Spiders of the KU Field Station
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Biogeography of the Caribbean Cyrtognatha Spiders Klemen Čandek1,6,7, Ingi Agnarsson2,4, Greta J
www.nature.com/scientificreports OPEN Biogeography of the Caribbean Cyrtognatha spiders Klemen Čandek1,6,7, Ingi Agnarsson2,4, Greta J. Binford3 & Matjaž Kuntner 1,4,5,6 Island systems provide excellent arenas to test evolutionary hypotheses pertaining to gene fow and Received: 23 July 2018 diversifcation of dispersal-limited organisms. Here we focus on an orbweaver spider genus Cyrtognatha Accepted: 1 November 2018 (Tetragnathidae) from the Caribbean, with the aims to reconstruct its evolutionary history, examine Published: xx xx xxxx its biogeographic history in the archipelago, and to estimate the timing and route of Caribbean colonization. Specifcally, we test if Cyrtognatha biogeographic history is consistent with an ancient vicariant scenario (the GAARlandia landbridge hypothesis) or overwater dispersal. We reconstructed a species level phylogeny based on one mitochondrial (COI) and one nuclear (28S) marker. We then used this topology to constrain a time-calibrated mtDNA phylogeny, for subsequent biogeographical analyses in BioGeoBEARS of over 100 originally sampled Cyrtognatha individuals, using models with and without a founder event parameter. Our results suggest a radiation of Caribbean Cyrtognatha, containing 11 to 14 species that are exclusively single island endemics. Although biogeographic reconstructions cannot refute a vicariant origin of the Caribbean clade, possibly an artifact of sparse outgroup availability, they indicate timing of colonization that is much too recent for GAARlandia to have played a role. Instead, an overwater colonization to the Caribbean in mid-Miocene better explains the data. From Hispaniola, Cyrtognatha subsequently dispersed to, and diversifed on, the other islands of the Greater, and Lesser Antilles. Within the constraints of our island system and data, a model that omits the founder event parameter from biogeographic analysis is less suitable than the equivalent model with a founder event. -
A Taxonomic Revision of the Orb Weaver Genus Acacesia (Araneae: Araneidae)
A TAXONOMIC REVISION OF THE ORB WEAVER GENUS ACACESIA (ARANEAE: ARANEIDAE) BY St3sAy GIt3Ec< ABSTRACT There are five species of Acacesia which range collectively from southern North America to Argentina. Two are previously known members of the genus, A. cornigera Petrunkevitch and A. hamata (Hentz). Three of these are new species: A. villalobosi and A. yacuiensis, from southern Brazil, and A. benigna from Bolivia and Peru. INTRODUCTION Acacesia is a genus of orb-weaving spiders common and endemic to the Americas, proposed by Simon in 1892. Hentz named the type species Epeira foliata in 1847. The genus con- tained the single species A. hamata until Petrunkevitch (1925) described A. cornigera. Subsequently published names, illustra- tions, and descriptions of new species of Acacesia have turned out to be synonyms of the two extant species (Chamberlin and Ivie 1936, Badcock 1932). Levi (1976) redescribed A. hamata in a revi- sion of Nearctic orb weaver genera, mentioning the Neotropical A. cornigera in passing. He hypothesized at the time that "there are three or four additional species of Acacesia, all Neotropical and all similar in appearance." The specimens I have examined for the current taxonomic revision corroborate this statement, and I expand the genus to include three new South American species. This study represents an addition to Levi's ongoing project of revising Neotropical orb weavers. I here report the results of my taxonomic project for which I examined and illustrated over 350 museum specimens. I describe factors I considered in delimiting new species such as their Harvard College, Harvard University, Cambridge, MA 02138 current address: Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY 14853 Manuscript received 7 July 1993. -
Cryptic Species Delimitation in the Southern Appalachian Antrodiaetus
Cryptic species delimitation in the southern Appalachian Antrodiaetus unicolor (Araneae: Antrodiaetidae) species complex using a 3RAD approach Lacie Newton1, James Starrett1, Brent Hendrixson2, Shahan Derkarabetian3, and Jason Bond4 1University of California Davis 2Millsaps College 3Harvard University 4UC Davis May 5, 2020 Abstract Although species delimitation can be highly contentious, the development of reliable methods to accurately ascertain species boundaries is an imperative step in cataloguing and describing Earth's quickly disappearing biodiversity. Spider species delimi- tation remains largely based on morphological characters; however, many mygalomorph spider populations are morphologically indistinguishable from each other yet have considerable molecular divergence. The focus of our study, Antrodiaetus unicolor species complex which contains two sympatric species, exhibits this pattern of relative morphological stasis with considerable genetic divergence across its distribution. A past study using two molecular markers, COI and 28S, revealed that A. unicolor is paraphyletic with respect to A. microunicolor. To better investigate species boundaries in the complex, we implement the cohesion species concept and employ multiple lines of evidence for testing genetic exchangeability and ecological interchange- ability. Our integrative approach includes extensively sampling homologous loci across the genome using a RADseq approach (3RAD), assessing population structure across their geographic range using multiple genetic clustering analyses that include STRUCTURE, PCA, and a recently developed unsupervised machine learning approach (Variational Autoencoder). We eval- uate ecological similarity by using large-scale ecological data for niche-based distribution modeling. Based on our analyses, we conclude that this complex has at least one additional species as well as confirm species delimitations based on previous less comprehensive approaches. -
Oak Woodland Litter Spiders James Steffen Chicago Botanic Garden
Oak Woodland Litter Spiders James Steffen Chicago Botanic Garden George Retseck Objectives • Learn about Spiders as Animals • Learn to recognize common spiders to family • Learn about spider ecology • Learn to Collect and Preserve Spiders Kingdom - Animalia Phylum - Arthropoda Subphyla - Mandibulata Chelicerata Class - Arachnida Orders - Acari Opiliones Pseudoscorpiones Araneae Spiders Arachnids of Illinois • Order Acari: Mites and Ticks • Order Opiliones: Harvestmen • Order Pseudoscorpiones: Pseudoscorpions • Order Araneae: Spiders! Acari - Soil Mites Characteriscs of Spiders • Usually four pairs of simple eyes although some species may have less • Six pair of appendages: one pair of fangs (instead of mandibles), one pair of pedipalps, and four pair of walking legs • Spinnerets at the end of the abdomen, which are used for spinning silk threads for a variety of purposes, such as the construction of webs, snares, and retreats in which to live or to wrap prey • 1 pair of sensory palps (often much larger in males) between the first pair of legs and the chelicerae used for sperm transfer, prey manipulation, and detection of smells and vibrations • 1 to 2 pairs of book-lungs on the underside of abdomen • Primitively, 2 body regions: Cephalothorax, Abdomen Spider Life Cycle • Eggs in batches (egg sacs) • Hatch inside the egg sac • molt to spiderlings which leave from the egg sac • grows during several more molts (instars) • at final molt, becomes adult – Some long-lived mygalomorphs (tarantulas) molt after adulthood Phenology • Most temperate -
Redescription and Generic Placement of the Spider Cryptachaea
Zootaxa 3507: 38–56 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2012 · Magnolia Press Article ISSN 1175-5334 (online edition) urn:lsid:zoobank.org:pub:8EDE33EB-3C43-4DFA-A1F4-5CC86DED76C8 Redescription and generic placement of the spider Cryptachaea gigantipes (Keyserling, 1890) (Araneae: Theridiidae) and notes on related synanthropic species in Australasia HELEN M. SMITH1,5, COR J. VINK2,3, BRIAN M. FITZGERALD4 & PHIL J. SIRVID4 1 Australian Museum, 6 College St, Sydney, New South Wales 2010, Australia. E-mail: [email protected] 2 Biosecurity & Biocontrol, AgResearch, Private Bag 4749, Christchurch 8140, New Zealand. E-mail: [email protected] 3 Entomology Research Museum, PO Box 84, Lincoln University, Lincoln 7647, New Zealand. 4 Museum of New Zealand Te Papa Tongarewa, PO Box 467, Wellington 6140, New Zealand. E-mail: [email protected], [email protected] 5 Corresponding author Abstract Cryptachaea gigantipes (Keyserling, 1890) n. comb. is redescribed from fresh material, the female is described for the first time and notes on biology are given. Cryptachaea gigantipes has been recorded from natural habitats in south-eastern Australia, but is also commonly encountered around houses and other built structures, there and in the North Island of New Zealand. The earliest New Zealand records are from the year 2000 and it would appear that the species has been accidentally introduced due to its synanthropic tendencies. The idea of a recent and limited initial introduction is supported by cytochrome c oxidase subunit 1 (COI) sequences, which are extremely homogeneous from New Zealand specimens compared to those from Australia. -
Molecular Insights Into the Phylogenetic Structure of the Spider
MolecularBlackwell Publishing Ltd insights into the phylogenetic structure of the spider genus Theridion (Araneae, Theridiidae) and the origin of the Hawaiian Theridion-like fauna MIQUEL A. ARNEDO, INGI AGNARSSON & ROSEMARY G. GILLESPIE Accepted: 9 March 2007 Arnedo, M. A., Agnarsson, I. & Gillespie, R. G. (2007). Molecular insights into the phylo- doi:10.1111/j.1463-6409.2007.00280.x genetic structure of the spider genus Theridion (Araneae, Theridiidae) and the origin of the Hawaiian Theridion-like fauna. — Zoologica Scripta, 36, 337–352. The Hawaiian happy face spider (Theridion grallator Simon, 1900), named for a remarkable abdominal colour pattern resembling a smiling face, has served as a model organism for under- standing the generation of genetic diversity. Theridion grallator is one of 11 endemic Hawaiian species of the genus reported to date. Asserting the origin of island endemics informs on the evolutionary context of diversification, and how diversity has arisen on the islands. Studies on the genus Theridion in Hawaii, as elsewhere, have long been hampered by its large size (> 600 species) and poor definition. Here we report results of phylogenetic analyses based on DNA sequences of five genes conducted on five diverse species of Hawaiian Theridion, along with the most intensive sampling of Theridiinae analysed to date. Results indicate that the Hawai- ian Islands were colonised by two independent Theridiinae lineages, one of which originated in the Americas. Both lineages have undergone local diversification in the archipelago and have convergently evolved similar bizarre morphs. Our findings confirm para- or polyphyletic status of the largest Theridiinae genera: Theridion, Achaearanea and Chrysso. -
Howard Associate Professor of Natural History and Curator Of
INGI AGNARSSON PH.D. Howard Associate Professor of Natural History and Curator of Invertebrates, Department of Biology, University of Vermont, 109 Carrigan Drive, Burlington, VT 05405-0086 E-mail: [email protected]; Web: http://theridiidae.com/ and http://www.islandbiogeography.org/; Phone: (+1) 802-656-0460 CURRICULUM VITAE SUMMARY PhD: 2004. #Pubs: 138. G-Scholar-H: 42; i10: 103; citations: 6173. New species: 74. Grants: >$2,500,000. PERSONAL Born: Reykjavík, Iceland, 11 January 1971 Citizenship: Icelandic Languages: (speak/read) – Icelandic, English, Spanish; (read) – Danish; (basic) – German PREPARATION University of Akron, Akron, 2007-2008, Postdoctoral researcher. University of British Columbia, Vancouver, 2005-2007, Postdoctoral researcher. George Washington University, Washington DC, 1998-2004, Ph.D. The University of Iceland, Reykjavík, 1992-1995, B.Sc. PROFESSIONAL AFFILIATIONS University of Vermont, Burlington. 2016-present, Associate Professor. University of Vermont, Burlington, 2012-2016, Assistant Professor. University of Puerto Rico, Rio Piedras, 2008-2012, Assistant Professor. National Museum of Natural History, Smithsonian Institution, Washington DC, 2004-2007, 2010- present. Research Associate. Hubei University, Wuhan, China. Adjunct Professor. 2016-present. Icelandic Institute of Natural History, Reykjavík, 1995-1998. Researcher (Icelandic invertebrates). Institute of Biology, University of Iceland, Reykjavík, 1993-1994. Research Assistant (rocky shore ecology). GRANTS Institute of Museum and Library Services (MA-30-19-0642-19), 2019-2021, co-PI ($222,010). Museums for America Award for infrastructure and staff salaries. National Geographic Society (WW-203R-17), 2017-2020, PI ($30,000). Caribbean Caves as biodiversity drivers and natural units for conservation. National Science Foundation (IOS-1656460), 2017-2021: one of four PIs (total award $903,385 thereof $128,259 to UVM). -
A Protocol for Online Documentation of Spider Biodiversity Inventories Applied to a Mexican Tropical Wet Forest (Araneae, Araneomorphae)
Zootaxa 4722 (3): 241–269 ISSN 1175-5326 (print edition) https://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2020 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4722.3.2 http://zoobank.org/urn:lsid:zoobank.org:pub:6AC6E70B-6E6A-4D46-9C8A-2260B929E471 A protocol for online documentation of spider biodiversity inventories applied to a Mexican tropical wet forest (Araneae, Araneomorphae) FERNANDO ÁLVAREZ-PADILLA1, 2, M. ANTONIO GALÁN-SÁNCHEZ1 & F. JAVIER SALGUEIRO- SEPÚLVEDA1 1Laboratorio de Aracnología, Facultad de Ciencias, Departamento de Biología Comparada, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Colonia Copilco el Bajo. C. P. 04510. Del. Coyoacán, Ciudad de México, México. E-mail: [email protected] 2Corresponding author Abstract Spider community inventories have relatively well-established standardized collecting protocols. Such protocols set rules for the orderly acquisition of samples to estimate community parameters and to establish comparisons between areas. These methods have been tested worldwide, providing useful data for inventory planning and optimal sampling allocation efforts. The taxonomic counterpart of biodiversity inventories has received considerably less attention. Species lists and their relative abundances are the only link between the community parameters resulting from a biotic inventory and the biology of the species that live there. However, this connection is lost or speculative at best for species only partially identified (e. g., to genus but not to species). This link is particularly important for diverse tropical regions were many taxa are undescribed or little known such as spiders. One approach to this problem has been the development of biodiversity inventory websites that document the morphology of the species with digital images organized as standard views. -
Sand Transport and Burrow Construction in Sparassid and Lycosid Spiders
2017. Journal of Arachnology 45:255–264 Sand transport and burrow construction in sparassid and lycosid spiders Rainer Foelix1, Ingo Rechenberg2, Bruno Erb3, Andrea Alb´ın4 and Anita Aisenberg4: 1Neue Kantonsschule Aarau, Biology Department, Electron Microscopy Unit, Zelgli, CH-5000 Aarau, Switzerland. Email: [email protected]; 2Technische Universita¨t Berlin, Bionik & Evolutionstechnik, Sekr. ACK 1, Ackerstrasse 71-76, D-13355 Berlin, Germany; 3Kilbigstrasse 15, CH-5018 Erlinsbach, Switzerland; 4Laboratorio de Etolog´ıa, Ecolog´ıa y Evolucio´n, Instituto de Investigaciones Biolo´gicas Clemente Estable, Avenida Italia 3318, CP 11600, Montevideo, Uruguay Abstract. A desert-living spider sparassid (Cebrennus rechenbergi Ja¨ger, 2014) and several lycosid spiders (Evippomma rechenbergi Bayer, Foelix & Alderweireldt 2017, Allocosa senex (Mello-Leita˜o, 1945), Geolycosa missouriensis (Banks, 1895)) were studied with respect to their burrow construction. These spiders face the problem of how to transport dry sand and how to achieve a stable vertical tube. Cebrunnus rechenbergi and A. senex have long bristles on their palps and chelicerae which form a carrying basket (psammophore). Small balls of sand grains are formed at the bottom of a tube and carried to the burrow entrance, where they are dispersed. Psammophores are known in desert ants, but this is the first report in desert spiders. Evippomma rechenbergi has no psammophore but carries sand by using a few sticky threads from the spinnerets; it glues the loose sand grains together, grasps the silk/sand bundle and carries it to the outside. Although C. rechenbergi and E. rechenbergi live in the same environment, they employ different methods to carry sand. -
Araneae, Theridiidae)
Phelsuma 14; 49-89 Theridiid or cobweb spiders of the granitic Seychelles islands (Araneae, Theridiidae) MICHAEL I. SAARISTO Zoological Museum, Centre for Biodiversity University of Turku,FIN-20014 Turku FINLAND [micsaa@utu.fi ] Abstract. - This paper describes 8 new genera, namely Argyrodella (type species Argyrodes pusillus Saaristo, 1978), Bardala (type species Achearanea labarda Roberts, 1982), Nanume (type species Theridion naneum Roberts, 1983), Robertia (type species Theridion braueri (Simon, 1898), Selimus (type species Theridion placens Blackwall, 1877), Sesato (type species Sesato setosa n. sp.), Spinembolia (type species Theridion clabnum Roberts, 1978), and Stoda (type species Theridion libudum Roberts, 1978) and one new species (Sesato setosa n. sp.). The following new combinations are also presented: Phycosoma spundana (Roberts, 1978) n. comb., Argyrodella pusillus (Saaristo, 1978) n. comb., Rhomphaea recurvatus (Saaristo, 1978) n. comb., Rhomphaea barycephalus (Roberts, 1983) n. comb., Bardala labarda (Roberts, 1982) n. comb., Moneta coercervus (Roberts, 1978) n. comb., Nanume naneum (Roberts, 1983) n. comb., Parasteatoda mundula (L. Koch, 1872) n. comb., Robertia braueri (Simon, 1898). n. comb., Selimus placens (Blackwall, 1877) n. comb., Sesato setosa n. gen, n. sp., Spinembolia clabnum (Roberts, 1978) n. comb., and Stoda libudum (Roberts, 1978) n. comb.. Also the opposite sex of four species are described for the fi rst time, namely females of Phycosoma spundana (Roberts, 1978) and P. menustya (Roberts, 1983) and males of Spinembolia clabnum (Roberts, 1978) and Stoda libudum (Roberts, 1978). Finally the morphology and terminology of the male and female secondary genital organs are discussed. Key words. - copulatory organs, morphology, Seychelles, spiders, Theridiidae. INTRODUCTION Theridiids or comb-footed spiders are very variable in general apperance often with considerable sexual dimorphism. -
Arthropods of Elm Fork Preserve
Arthropods of Elm Fork Preserve Arthropods are characterized by having jointed limbs and exoskeletons. They include a diverse assortment of creatures: Insects, spiders, crustaceans (crayfish, crabs, pill bugs), centipedes and millipedes among others. Column Headings Scientific Name: The phenomenal diversity of arthropods, creates numerous difficulties in the determination of species. Positive identification is often achieved only by specialists using obscure monographs to ‘key out’ a species by examining microscopic differences in anatomy. For our purposes in this survey of the fauna, classification at a lower level of resolution still yields valuable information. For instance, knowing that ant lions belong to the Family, Myrmeleontidae, allows us to quickly look them up on the Internet and be confident we are not being fooled by a common name that may also apply to some other, unrelated something. With the Family name firmly in hand, we may explore the natural history of ant lions without needing to know exactly which species we are viewing. In some instances identification is only readily available at an even higher ranking such as Class. Millipedes are in the Class Diplopoda. There are many Orders (O) of millipedes and they are not easily differentiated so this entry is best left at the rank of Class. A great deal of taxonomic reorganization has been occurring lately with advances in DNA analysis pointing out underlying connections and differences that were previously unrealized. For this reason, all other rankings aside from Family, Genus and Species have been omitted from the interior of the tables since many of these ranks are in a state of flux. -
The Generic and Specific Status of Four Ohio Spiders of the Genus Agelenopsis
THE OHIO JOURNAL OF SCIENCE VOL. XLI MARCH, 1941 No. 2 THE GENERIC AND SPECIFIC STATUS OF FOUR OHIO SPIDERS OF THE GENUS AGELENOPSIS PAUL J. SEYLER, Ohio State University INTRODUCTION Every taxonomist sooner or later faces a situation in which he must determine whether he is dealing with a single highly variable species, or with several species which appears to intergrade. This problem confronting us has been recognized by Petrunkevitch, Emerton, Comstock, Chamberlin, Ivie, Gertsch and others. Arachnologists have been perplexed by the variability of a species which has been considered Agelena naevia Walckenaer as the following quotations will indicate. Petrunkevitch (1925) on page 561 states: "It does not require prolonged study to show that variation in size in A gelena naevia is very great. Specimens collected in the same locality, often under the same piece of loose bark, guarding their cocoons with eggs, and therefore in the same stage of maturity, are occasionally twice the size of others. The fact that two such distinguished arachnologists as Graf Keyserling and Becker have described two new species of Agelena from North America, which long since have been recognized as synonyms of A. naevia, shows that the variation in structure is also sufficient to be considered as specific in absence of intergradient forms." Emerton (1890) recognized the great variation that exists in both the palpus of the male and epigynum of the female. He has illustrated four types of palps and seven variations in the atrial opening of the epigynum. He says that, "The shape of the external opening of the epigynum is even more variable than that of the palpal organ." Comstock (1912), page 586, in his spider book: "This species is either a variable one in the form of the palpi of the males and 51 52 PAUL J.