DOCSLIB.ORG

Decapod Crustaceans from the Paleocene of Central Texas, USA

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Decapod Crustaceans from the Paleocene of Central Texas, USA Revista Mexicana de Ciencias Geológicas,Decapod v. crustaceans 26, núm. 3, from2009, the p. 745-763Paleocene of Central Texas, USA 745 Decapod crustaceans from the Paleocene of Central Texas, USA Adam Armstrong1, Torrey Nyborg2, Gale A. Bishop3, Àlex Ossó-Morales4, and Francisco J. Vega5,* 1 306 Hilltop Road, Keene, TX 76059, U.S.A. 2 Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, California 92350, U.S.A. 3 Department of Geology and Geography, Georgia Southern University, Statesboro, GA 30460, U.S.A. 4 Josep Vicenç Foix, 12-H, 1er-1ª 43007 Tarragona, Catalonia, Spain. 5 Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, México DF 04510, Mexico. * [email protected] ABSTRACT Fourteen species of decapods crustaceans are described from a single locality near Mexia, Texas, where Paleocene sediments of the Mexia Clay Member of the Wills Point Formation crop out. The species are represented by Hoploparia sp., Linuparus wilcoxensis Rathbun, 1935, an unnamed paguroid, Kierionopsis nodosa Davidson, 1966, Pithonoton cardwelli new species, Caloxanthus sp., Macroacaena johnsoni (Rathbun, 1935), new combination, Raninoides bournei (Rathbun, 1928), R. treldenaesensis (Collins and Jakobsen, 2003), Prehepatus sp., Tehuacana americana (Rathbun, 1935), new combination, Costacopluma texana new species, Paraverrucoides alabamensis (Rathbun, 1935) and Viapinnixa mexiaensis new species. Morphological details unknown for previously described species are included. New systematic placements are offered based on recent research. Intraspecifi c morphological variation is documented for the goneplacoid crab Tehuacana americana. Costacopluma texana is the second Paleogene species of that genus in southeastern USA, and because of its abundance represents the most completely described species for the genus. This fauna represents one of the most diverse assemblages of Paleocene crustacean decapods. Key words: Paleocene, Crustacea, Mexia, Texas. RESUMEN Se describen catorce especies de crustáceos decápodos colectados en una sola localidad cercana a Mexia, Texas, en donde afl oran sedimentos del Miembro Arcilloso Mexia de la Formación Wills Point. Las especies están representadas por Hoploparia sp., Linuparus wilcoxensis Rathbun, 1935, un paguroideo indeterminado, Kierionopsis nodosa Davidson, 1966, Pithonoton cardwelli especie nueva, Caloxanthus sp., Macroacaena johnsoni (Rathbun, 1935), combinación nueva, Raninoides bournei (Rathbun, 1928), R. treldenaesensis (Collins y Jakobsen, 2003), Prehepatus sp., Tehuacana americana (Rathbun, 1935) combinación nueva, Costacopluma texana especie nueva, Paraverrucoides alabamensis (Rathbun, 1935) y Viapinnixa mexiaensis especie nueva. Se incluyen detalles morfológicos, no descritos para especies previamente reportadas. Se ofrece una sistemática actualizada, basada en investigaciones recientes. Armstrong, A., Nyborg, T., Bishop, G.A., Ossó-Morales À., Vega, F.J., 2009, Decapod crustaceans from the Paleocene of Central Texas, USA: Revista Mexicana de Ciencias Geológicas, v. 26, núm. 3, p. 745-763. 746 Armstrong et al. Se documenta la variación morfológica intraespecífi ca para el cangrejo goneplacoideo Tehuacana americana. Costacopluma texana es la segunda especie del género en el Paleógeno del sureste de EUA, y debido a la abundancia de ejemplares, es la especie descrita con mayor detalle del género Costacopluma. Esta fauna representa una de las asociaciones más diversas de crustáceos decápodos del Paleoceno. Palabras clave: Paleoceno, Crustacea, Mexia, Texas. INTRODUCTION decapods herein reported. Biostratigraphy is primarily based on foraminifera with good index foraminifera indicative of Decapod crustaceans were collected from a quarry site a Paleocene age (Kellough, 1959; 1965). about two miles west of Mexia, Texas from the Paleocene Specimens, referred to in this study, are deposited Mexia Clay Member of the Wills Point Formation (Figure at the Texas Natural Science Center, Austin (previously 1). The Wills Point Formation is part of the Paleocene Paleontological Collection of the Bureau of Economic Midway Group of the East Texas Basin (McGowen et al., Geology, University of Texas), under acronym NPL, and 1972; Oldani, 1988; Barnes et al., 1992). Deposition of Museu de Geologia del Seminari de Barcelona, under acro- the Midway Group occurred during the Early Paleocene nym MGSB. Classifi cation follows that of Ng et al. (2008) (Danian) associated with a major transgression following and Števčić (2005). the Cretaceous-Tertiary event. The maximum advance of this transgression is represented by the outer neritic deposits of the Mexia Clay Member (Kellough, 1965; Oldani, 1988). SYSTEMATIC PALEONTOLOGY The Midway Group is the lowermost stratigraphic Tertiary unit within the East Texas Basin, separated from the underly- Order Decapoda Latreille, 1802 ing Gulfi an Cretaceous Navarro Group by a biostratigraphic Infraorder Astacidea Latreille, 1802 and depositional hiatus. The Mexia Clay Member is con- Superfamily Nephropoidea Dana, 1852 formably overlain by the Paleocene-Eocene Wilcox Group Family Nephropidae Dana, 1852 (Oldani, 1988). In east Texas, the Midway Group consists Genus Hoploparia McCoy, 1849 of two formations (Kincaid and Wills Point formations), each with three members (Oldani, 1988) (Figure 2). The Type species. Astacus longimanus Sowerby, 1826, by sub- thickness of the Midway Group, within the East Texas Basin, sequent designation of Rathbun, 1926. varies between 120 and 550 m; it is more than 300 m at the border of Limestone and Navarro counties, near the town of Hoploparia sp. Tehuacana (Figure 1), and thins to about 120 m at the study Figures 3.1, 3.2 quarry (Oldani, 1988). The Wills Point Formation consists of the basal clays of the Mexia Clay Member, overlain by Description of study material. Cephalothorax small, the silty shales of the Kerens Member, which grade into the elongated, surface covered by small scale-like tubercles, interbedded sands and shales of the Solomon Creek Member much fi ner toward ventral and posterior margins; posterior (Oldani, 1988). Like the Midway Group, the thickness of margin curved, rimmed; postcervical groove deep, slightly the Wills Point Formation varies between 60 and 300 m sinuous; cervical groove one-third the length of postcervi- (Oldani, 1988). In Navarro County it averages 150 to 200 cal groove. m (Oldani, 1988). The Mexia Clay Member consists of dark Material examined. One incomplete cephalothorax and gray, thinly laminated clay shale, bearing pyrite nodules, one fragment of a cheliped, hypotypes NPL31148 and limonite, siderite and calcareous concretions (Kellough, NPL31149. 1965; Oldani, 1988). The Mexia Clay Member averages Measurements (in mm). Hypotype NPL31148 cephalotho- 50 meters making up the bottom quarter of the Wills Point rax length = about 26.0, height = 15.9; hypotype NPL31149 Formation (Kellough, 1965). partial palm length = >21.6, height = >22.0. Abundant decapods, horn corals, scaphopods, pelecy- Discussion. The carapace fragment differs from Hoploparia pods, gastropods, nautiloids, foraminifera, fi sh teeth, and johnsoni Rathbun, 1935 from the middle Eocene of Alabama, some shark teeth occur within the lower part of the Mexia in bearing bigger tubercles directed forward. H. buntingi Clay Member (Kellough, 1965), 6-10 meters above the (Feldmann and Holland, 1971) from the Paleocene of North Tehuacana Limestone. At the study quarry, the basal Mexia Dakota is larger and has a straight postcervical groove. Clay Member is represented by a series of siltstone/claystone H. klebsi Noetling, 1885 from the Paleogene of northern lenses with abundant yellow, brown, and black calcareous Germany is larger and shows coarser tubercles (see also nodules that preserve abundant fossils, including the fossil Förster and Mundlos, 1982). The specimens are too incom- Decapod crustaceans from the Paleocene of Central Texas, USA 747 Discussion. Carapace fragment most resembles the cara- pace features as seen in Linuparus wilcoxensis from the Lower Eocene of Wilcox, Alabama. Compared with the type specimen figured by Rathbun (1935, fig. 16.13), the specimen from Mexia is smaller and ridges of the gastric area define a lanceolate shape, instead of being subparallel. A more complete specimen reported by Vega et al. (2007, fig. 4.9) from the Paleocene of Coahuila, northeastern Mexico, show a lanceolate shape for the ridges of the gastric area. More complete specimens are necessary to define a specific affinity. Infraorder Anomura MacLeay, 1838 Superfamily Paguroidea Latreille, 1802 Paguroidea, gen. and sp. indet. Figures 3.4, 3.5 Figure 1. Location map of fossil locality east of Mexia, Limestone County, Texas. Description of study material. Right palm small, rectan- gular, one-third longer than high, narrow at junction with plete to confirm species affinity. carpus; outer surface convex, covered by coarse punctae; Although most species of Hoploparia are docu- inner surface flat, covered with aerolations that become mented from Cretaceous deposit, it survived in Paleogene scarce toward lower margin; fixed finger incomplete, tropical and subtropical areas. According to Schweitzer and slightly curved inwards, outer surface covered by strong Feldmann (2005), the nearly cosmopolitan distribution, tubercles, inner surface with punctae. Occlusal surface particularly in higher latitudes during Cretaceous times, covered by punctae. was an important fact to buffer the effects of the K/P event Material examined.
Load more

Recommended publications
  • A Classification of Living and Fossil Genera of Decapod Crustaceans
    RAFFLES BULLETIN OF ZOOLOGY 2009 Supplement No. 21: 1–109 Date of Publication: 15 Sep.2009 © National University of Singapore A CLASSIFICATION OF LIVING AND FOSSIL GENERA OF DECAPOD CRUSTACEANS Sammy De Grave1, N. Dean Pentcheff 2, Shane T. Ahyong3, Tin-Yam Chan4, Keith A. Crandall5, Peter C. Dworschak6, Darryl L. Felder7, Rodney M. Feldmann8, Charles H. J. M. Fransen9, Laura Y. D. Goulding1, Rafael Lemaitre10, Martyn E. Y. Low11, Joel W. Martin2, Peter K. L. Ng11, Carrie E. Schweitzer12, S. H. Tan11, Dale Tshudy13, Regina Wetzer2 1Oxford University Museum of Natural History, Parks Road, Oxford, OX1 3PW, United Kingdom [email protected] [email protected] 2Natural History Museum of Los Angeles County, 900 Exposition Blvd., Los Angeles, CA 90007 United States of America [email protected] [email protected] [email protected] 3Marine Biodiversity and Biosecurity, NIWA, Private Bag 14901, Kilbirnie Wellington, New Zealand [email protected] 4Institute of Marine Biology, National Taiwan Ocean University, Keelung 20224, Taiwan, Republic of China [email protected] 5Department of Biology and Monte L. Bean Life Science Museum, Brigham Young University, Provo, UT 84602 United States of America [email protected] 6Dritte Zoologische Abteilung, Naturhistorisches Museum, Wien, Austria [email protected] 7Department of Biology, University of Louisiana, Lafayette, LA 70504 United States of America [email protected] 8Department of Geology, Kent State University, Kent, OH 44242 United States of America [email protected] 9Nationaal Natuurhistorisch Museum, P. O. Box 9517, 2300 RA Leiden, The Netherlands [email protected] 10Invertebrate Zoology, Smithsonian Institution, National Museum of Natural History, 10th and Constitution Avenue, Washington, DC 20560 United States of America [email protected] 11Department of Biological Sciences, National University of Singapore, Science Drive 4, Singapore 117543 [email protected] [email protected] [email protected] 12Department of Geology, Kent State University Stark Campus, 6000 Frank Ave.
    [Show full text]
  • Lobsters-Identification, World Distribution, and U.S. Trade
    Lobsters-Identification, World Distribution, and U.S. Trade AUSTIN B. WILLIAMS Introduction tons to pounds to conform with US. tinents and islands, shoal platforms, and fishery statistics). This total includes certain seamounts (Fig. 1 and 2). More­ Lobsters are valued throughout the clawed lobsters, spiny and flat lobsters, over, the world distribution of these world as prime seafood items wherever and squat lobsters or langostinos (Tables animals can also be divided rougWy into they are caught, sold, or consumed. 1 and 2). temperate, subtropical, and tropical Basically, three kinds are marketed for Fisheries for these animals are de­ temperature zones. From such partition­ food, the clawed lobsters (superfamily cidedly concentrated in certain areas of ing, the following facts regarding lob­ Nephropoidea), the squat lobsters the world because of species distribu­ ster fisheries emerge. (family Galatheidae), and the spiny or tion, and this can be recognized by Clawed lobster fisheries (superfamily nonclawed lobsters (superfamily noting regional and species catches. The Nephropoidea) are concentrated in the Palinuroidea) . Food and Agriculture Organization of temperate North Atlantic region, al­ The US. market in clawed lobsters is the United Nations (FAO) has divided though there is minor fishing for them dominated by whole living American the world into 27 major fishing areas for in cooler waters at the edge of the con­ lobsters, Homarus americanus, caught the purpose of reporting fishery statis­ tinental platform in the Gul f of Mexico, off the northeastern United States and tics. Nineteen of these are marine fish­ Caribbean Sea (Roe, 1966), western southeastern Canada, but certain ing areas, but lobster distribution is South Atlantic along the coast of Brazil, smaller species of clawed lobsters from restricted to only 14 of them, i.e.
    [Show full text]
  • (Campanian) of the Moyenne Moulouya, Northeast Morocco
    Revista Mexicana de CienciasNew Geológicas, crabs from v. 27,the núm.Upper 2, Cretaceous 2010, p. 213-224 of the Moyenne Moulouya, Morocco 213 New crabs (Crustacea, Decapoda) from the Upper Cretaceous (Campanian) of the Moyenne Moulouya, northeast Morocco Àlex Ossó-Morales1, Pedro Artal2, and Francisco J. Vega3,* 1 Josep Vicenç Foix, 12-H, 1er-1ª 43007 Tarragona, Catalonia, Spain, 2 Museo Geológico del Seminario de Barcelona, Diputación 231, E-08007 Barcelona, Spain. 3 Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Del. Coyoacán, 04510, México D. F., Mexico. * [email protected] ABSTRACT The presence of the genera Costacopluma and Ophthalmoplax in Upper Cretaceous (Campanian) Moroccan strata is documented on the basis of specimens collected from the Calcaires à slumps de Taghit Formation, Moyenne Moulouya (Morocco). Two new species are described, Ophthalmoplax minimus and Costacopluma maroccana. The first record for Opthalmoplax in the west Tethyan realm is reported, and systematic affinities of this genus and its species are discussed. An absolute age of the late Campanian was obtained for this assemblage from 87Sr/86Sr analysis applied to well preserved cuticle calcitic remains of Ophthalmoplax minimus. Costacopluma maroccana represents the 14th species for this genus and the fourth Cretaceous species. Its morphology reinforces hypothesis of two main phyletic groups for this genus. Key words: Crustacea, Decapoda, Ophthalmoplax, Costacopluma, Campanian, Morocco. RESUMEN Se documenta la presencia de los géneros Ophthalmoplax y Costacopluma con base en especímenes recolectados en sedimentos del Cretácico Superior (Campaniano) de la Moyenne Mouluya (Marruecos). Se describen dos nuevas especies: Ophthalmoplax minimus y Costacopluma maroccana. Se identifíca y localiza (por primera vez en la parte occidental del dominio del Tethys) el género Ophthalmoplax, discutiéndose las afinidades sistemáticas de este género y sus especies.
    [Show full text]
  • A Large Hadrosaurid Dinosaur from Presa San Antonio, Cerro Del Pueblo Formation, Coahuila, Mexico
    A large hadrosaurid dinosaur from Presa San Antonio, Cerro del Pueblo Formation, Coahuila, Mexico ROGELIO ANTONIO REYNA-HERNÁNDEZ, HÉCTOR E. RIVERA-SYLVA, LUIS E. SILVA-MARTÍNEZ, and JOSÉ RUBÉN GUZMAN-GUTIÉRREZ Reyna-Hernández, R.A., Rivera-Sylva, H.E., Silva-Martínez, L.E., and Guzman-Gutiérrez, J.R. 2021. A large hadro- saurid dinosaur from Presa San Antonio, Cerro del Pueblo Formation, Coahuila, Mexico. Acta Palae onto logica Polonica 66 (Supplement to x): xxx–xxx. New hadrosaurid postcranial material is reported, collected near Presa San Antonio, Parras de la Fuente municipality, Coahuila, Mexico, in a sedimentary sequence belonging to the upper Campanian of the Cerro del Pueblo Formation, in the Parras Basin. The skeletal remains include partial elements from the pelvic girdle (left ilium, right pubis, ischium, and incomplete sacrum), a distal end of a left femur, almost complete right and left tibiae, right metatarsals II and IV, cervical and caudal vertebrae. Also, partially complete forelimb elements are present, which are still under preparation. The pubis shows characters of the Lambeosaurinae morphotypes, but the lack of cranial elements does not allow us to directly differentiate this specimen from the already described hadrosaurid taxa from the studied area, such as Velafrons coahuilensis, Latirhinus uitstlani, and Kritosaurus navajovius. This specimen, referred as Lambeosaurinae indet., adds to the fossil record of the hadrosaurids in southern Laramidia during the Campanian. Key words: Dinosauria, Hadrosauridae, Lambeosaurinae, Cretaceous, Campanian, Mexico. Rogelio Antonio Reyna-Hernández [[email protected]], Luis E. Silva-Martínez [[email protected]], Laboratorio de Paleobiología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Av.
    [Show full text]
  • Part I. an Annotated Checklist of Extant Brachyuran Crabs of the World
    THE RAFFLES BULLETIN OF ZOOLOGY 2008 17: 1–286 Date of Publication: 31 Jan.2008 © National University of Singapore SYSTEMA BRACHYURORUM: PART I. AN ANNOTATED CHECKLIST OF EXTANT BRACHYURAN CRABS OF THE WORLD Peter K. L. Ng Raffles Museum of Biodiversity Research, Department of Biological Sciences, National University of Singapore, Kent Ridge, Singapore 119260, Republic of Singapore Email: [email protected] Danièle Guinot Muséum national d'Histoire naturelle, Département Milieux et peuplements aquatiques, 61 rue Buffon, 75005 Paris, France Email: [email protected] Peter J. F. Davie Queensland Museum, PO Box 3300, South Brisbane, Queensland, Australia Email: [email protected] ABSTRACT. – An annotated checklist of the extant brachyuran crabs of the world is presented for the first time. Over 10,500 names are treated including 6,793 valid species and subspecies (with 1,907 primary synonyms), 1,271 genera and subgenera (with 393 primary synonyms), 93 families and 38 superfamilies. Nomenclatural and taxonomic problems are reviewed in detail, and many resolved. Detailed notes and references are provided where necessary. The constitution of a large number of families and superfamilies is discussed in detail, with the positions of some taxa rearranged in an attempt to form a stable base for future taxonomic studies. This is the first time the nomenclature of any large group of decapod crustaceans has been examined in such detail. KEY WORDS. – Annotated checklist, crabs of the world, Brachyura, systematics, nomenclature. CONTENTS Preamble .................................................................................. 3 Family Cymonomidae .......................................... 32 Caveats and acknowledgements ............................................... 5 Family Phyllotymolinidae .................................... 32 Introduction .............................................................................. 6 Superfamily DROMIOIDEA ..................................... 33 The higher classification of the Brachyura ........................
    [Show full text]
  • 09-Innocenti 123-135
    Atti Soc. Tosc. Sci. Nat., Mem., Serie B, 120 (2013) pagg. 123-135, tab. 1; doi: 10.2424/ASTSN.M.2013.09 GIANNA INNOCENTI & GIANLUCA STASOLLA (*) COLLECTIONS OF THE NATURAL HISTORY MUSEUM ZOOLOGICAL SECTION «LA SPECOLA» OF THE UNIVERSITY OF FLORENCE XXXI. Crustacea, Class Malacostraca, Order Decapoda. Superfamilies Dromioidea, Homoloidea, Aethroidea, Bellioidea, Calappoidea, Cancroidea, Carpilioidea, Cheiragonoidea, Corystoidea, Dairoidea, Dorippoidea, Eriphioidea Abstract - Collections of the Natural History Museum Zoological 1952). The first specimens were two species collected Section «La Specola» of the University of Florence. XXXI. Crustacea, during the cruise of the R/N «Magenta» (1865-1868), Class Malacostraca, Order Decapoda. Superfamilies Dromioidea, Homo- loidea, Aethroidea, Bellioidea, Calappoidea, Cancroidea, Carpilioidea, reported also by Targioni Tozzetti (1877) in his ca- Cheiragonoidea, Corystoidea, Dairoidea, Dorippoidea, Eriphioidea.A talogue. list of the specimens belonging to the order Decapoda, belonging Besides past collections, a good part of the Museum to the following families: Dromiidae, Dynomenidae, Homolidae, holdings consist of specimens collected in Somalia and Aethridae, Belliidae, Calappidae, Matutidae, Atelecyclidae, Can- cridae, Pirimelidae, Carpiliidae, Cheiragonidae, Corystidae, Dacry- other East African countries, during research missions opilumnidae, Dairidae, Dorippidae, Ethusidae, Eriphiidae, Menip- conducted by the Museum itself, by the «Spedizione pidae, Oziidae, Platyxanthidae preserved in the
    [Show full text]
  • 1 Crustaceans in Cold Seep Ecosystems: Fossil Record, Geographic Distribution, Taxonomic Composition, 2 and Biology 3 4 Adiël A
    1 Crustaceans in cold seep ecosystems: fossil record, geographic distribution, taxonomic composition, 2 and biology 3 4 Adiël A. Klompmaker1, Torrey Nyborg2, Jamie Brezina3 & Yusuke Ando4 5 6 1Department of Integrative Biology & Museum of Paleontology, University of California, Berkeley, 1005 7 Valley Life Sciences Building #3140, Berkeley, CA 94720, USA. Email: [email protected] 8 9 2Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, CA 92354, USA. 10 Email: [email protected] 11 12 3South Dakota School of Mines and Technology, Rapid City, SD 57701, USA. Email: 13 [email protected] 14 15 4Mizunami Fossil Museum, 1-47, Yamanouchi, Akeyo-cho, Mizunami, Gifu, 509-6132, Japan. 16 Email: [email protected] 17 18 This preprint has been submitted for publication in the Topics in Geobiology volume “Ancient Methane 19 Seeps and Cognate Communities”. Specimen figures are excluded in this preprint because permissions 20 were only received for the peer-reviewed publication. 21 22 Introduction 23 24 Crustaceans are abundant inhabitants of today’s cold seep environments (Chevaldonné and Olu 1996; 25 Martin and Haney 2005; Karanovic and Brandão 2015), and could play an important role in structuring 26 seep ecosystems. Cold seeps fluids provide an additional source of energy for various sulfide- and 27 hydrocarbon-harvesting bacteria, often in symbiosis with invertebrates, attracting a variety of other 28 organisms including crustaceans (e.g., Levin 2005; Vanreusel et al. 2009; Vrijenhoek 2013). The 29 percentage of crustaceans of all macrofaunal specimens is highly variable locally in modern seeps, from 30 0–>50% (Dando et al. 1991; Levin et al.
    [Show full text]
  • A New Classification of the Xanthoidea Sensu Lato
    Contributions to Zoology, 75 (1/2) 23-73 (2006) A new classifi cation of the Xanthoidea sensu lato (Crustacea: Decapoda: Brachyura) based on phylogenetic analysis and traditional systematics and evaluation of all fossil Xanthoidea sensu lato Hiroaki Karasawa1, Carrie E. Schweitzer2 1Mizunami Fossil Museum, Yamanouchi, Akeyo, Mizunami, Gifu 509-6132, Japan, e-mail: GHA06103@nifty. com; 2Department of Geology, Kent State University Stark Campus, 6000 Frank Ave. NW, North Canton, Ohio 44720, USA, e-mail: [email protected] Key words: Crustacea, Decapoda, Brachyura, Xanthoidea, Portunidae, systematics, phylogeny Abstract Family Pilumnidae ............................................................. 47 Family Pseudorhombilidae ............................................... 49 A phylogenetic analysis was conducted including representatives Family Trapeziidae ............................................................. 49 from all recognized extant and extinct families of the Xanthoidea Family Xanthidae ............................................................... 50 sensu lato, resulting in one new family, Hypothalassiidae. Four Superfamily Xanthoidea incertae sedis ............................... 50 xanthoid families are elevated to superfamily status, resulting in Superfamily Eriphioidea ......................................................... 51 Carpilioidea, Pilumnoidoidea, Eriphioidea, Progeryonoidea, and Family Platyxanthidae ....................................................... 52 Goneplacoidea, and numerous subfamilies are elevated
    [Show full text]
  • How to Become a Crab: Phenotypic Constraints on a Recurring Body Plan
    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 25 December 2020 doi:10.20944/preprints202012.0664.v1 How to become a crab: Phenotypic constraints on a recurring body plan Joanna M. Wolfe1*, Javier Luque1,2,3, Heather D. Bracken-Grissom4 1 Museum of Comparative Zoology and Department of Organismic & Evolutionary Biology, Harvard University, 26 Oxford St, Cambridge, MA 02138, USA 2 Smithsonian Tropical Research Institute, Balboa–Ancon, 0843–03092, Panama, Panama 3 Department of Earth and Planetary Sciences, Yale University, New Haven, CT 06520-8109, USA 4 Institute of Environment and Department of Biological Sciences, Florida International University, Biscayne Bay Campus, 3000 NE 151 Street, North Miami, FL 33181, USA * E-mail: [email protected] Summary: A fundamental question in biology is whether phenotypes can be predicted by ecological or genomic rules. For over 140 years, convergent evolution of the crab-like body plan (with a wide and flattened shape, and a bent abdomen) at least five times in decapod crustaceans has been known as ‘carcinization’. The repeated loss of this body plan has been identified as ‘decarcinization’. We offer phylogenetic strategies to include poorly known groups, and direct evidence from fossils, that will resolve the pattern of crab evolution and the degree of phenotypic variation within crabs. Proposed ecological advantages of the crab body are summarized into a hypothesis of phenotypic integration suggesting correlated evolution of the carapace shape and abdomen. Our premise provides fertile ground for future studies of the genomic and developmental basis, and the predictability, of the crab-like body form. Keywords: Crustacea, Anomura, Brachyura, Carcinization, Phylogeny, Convergent evolution, Morphological integration 1 © 2020 by the author(s).
    [Show full text]
  • The Eocene Decapod Crustacean Fauna of the "Main" Quarry in Arzignano (Vicenza - Ne Italy) with the Description of a New Species of Raninidae
    Lavori - Soc. Ven. Sc. Nat. - Vol. 29: 109-117, Venezia, 31 gennaio 2004 THE EOCENE DECAPOD CRUSTACEAN FAUNA OF THE "MAIN" QUARRY IN ARZIGNANO (VICENZA - NE ITALY) WITH THE DESCRIPTION OF A NEW SPECIES OF RANINIDAE CLAUDIO BESCHIN*, ALESSANDRA BUSULINI**, ANTONIO DE ANGELI***, GIULIANO TESSIER** Key words: Crustacea, Decapoda, Raninidae, Eocene, NE Italy. Abstract The Eocene crustacean fauna found in the "Main" quarry of Arzignano (Vicenza - NE Italy) has been studied for twenty years and the number of species is still increasing. Up to now the known species are 53 and belong to 20 families: Callianassidae, Albuneidae, Diogenidae, Dromiidac, Dynomenidae, Raninidae, Calappidae, Hepatidae, Majidae, Dairidae, Parthenopidae, Retroplumidae, Cheiragonidae, Portunidae, Carpiliidae, Goneplacidae, Pilumnidae, Xanthidae, Palicidae and Grapsidae. The new discovery of a very well preserved specimen of great size has allowed the creation of Lophoranina maxima sp. nov. and a better placement of the specimens previously known as L. cf. reussi. The new species is characterized by the number and the distribution of the transverse ridges on the dorsal surface of carapace and the shape and distribution of the little spines on the ridges which vary in the different phases of growth. The genus Lophoranina is widely spread in the Eocene deposits of Veneto. The great size of the studied specimen let us say that L. maxima sp. nov. is the greatest fossil Raninidae that has ever been found. Riassunto La fauna eocenica a crostacei decapodi delta cava "Main" di Arzignano (Vicenza - Italia nordorientale) con la descrizione di una nuova specie di Raninidae. La fauna a crostacei di eta eocenica rinvenuta nella cava "Main" di Arzignano (Vicenza - Italia nordorientale) viene studiata ormai da vent'anni e si arricchisce continuamente di nuove forme.
    [Show full text]
  • Checklist of Brachyuran Crabs (Crustacea: Decapoda) from the Eastern Tropical Pacific by Michel E
    BULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIOLOGIE, 65: 125-150, 1995 BULLETIN VAN HET KONINKLIJK BELGISCH INSTITUUT VOOR NATUURWETENSCHAPPEN, BIOLOGIE, 65: 125-150, 1995 Checklist of brachyuran crabs (Crustacea: Decapoda) from the eastern tropical Pacific by Michel E. HENDRICKX Abstract Introduction Literature dealing with brachyuran crabs from the east Pacific When available, reliable checklists of marine species is reviewed. Marine and brackish water species reported at least occurring in distinct geographic regions of the world are once in the Eastern Tropical Pacific zoogeographic subregion, of multiple use. In addition of providing comparative which extends from Magdalena Bay, on the west coast of Baja figures for biodiversity studies, they serve as an impor- California, Mexico, to Paita, in northern Peru, are listed and tant tool in defining extension of protected area, inferr- their distribution range along the Pacific coast of America is provided. Unpublished records, based on material kept in the ing potential impact of anthropogenic activity and author's collections were also considered to determine or con- complexity of communities, and estimating availability of firm the presence of species, or to modify previously published living resources. Checklists for zoogeographic regions or distribution ranges within the study area. A total of 450 species, provinces also facilitate biodiversity studies in specific belonging to 181 genera, are included in the checklist, the first habitats, which serve as points of departure for (among ever made available for the entire tropical zoogeographic others) studying the structure of food chains, the relative subregion of the west coast of America. A list of names of species abundance of species, and number of species or total and subspecies currently recognized as invalid for the area is number of organisms of various physical sizes (MAY, also included.
    [Show full text]
  • Phylogenetics of the Brachyuran Crabs (Crustacea: Decapoda): the Status of Podotremata Based on Small Subunit Nuclear Ribosomal RNA
    Available online at www.sciencedirect.com Molecular Phylogenetics and Evolution 45 (2007) 576–586 www.elsevier.com/locate/ympev Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): The status of Podotremata based on small subunit nuclear ribosomal RNA Shane T. Ahyong a,*, Joelle C.Y. Lai b, Deirdre Sharkey c, Donald J. Colgan c, Peter K.L. Ng b a Biodiversity and Biosecurity, National Institute of Water and Atmospheric Research, Private Bag 14901 Kilbirnie, Wellington, New Zealand b School of Biological Sciences, National University of Singapore, Kent Ridge, Singapore c Australian Museum, 6 College Street, Sydney, NSW 2010, Australia Received 26 January 2007; revised 13 March 2007; accepted 23 March 2007 Available online 13 April 2007 Abstract The true crabs, the Brachyura, are generally divided into two major groups: Eubrachyura or ‘advanced’ crabs, and Podotremata or ‘primitive’ crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognised by the possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphyletic, or even as non-brachyuran. For the first time, the phylogenetic positions of the podotreme crabs were studied by cladistic analysis of small subunit nuclear ribosomal RNA sequences. Eight of 10 podotreme families were represented along with representatives of 17 eubr- achyuran families. Under both maximum parsimony and Bayesian Inference, Podotremata was found to be significantly paraphyletic, comprising three major clades: Dromiacea, Raninoida, and Cyclodorippoida. The most ‘basal’ is Dromiacea, followed by Raninoida and Cylodorippoida. Notably, Cyclodorippoida was identified as the sister group of the Eubrachyura.
    [Show full text]