DOCSLIB.ORG

Lecture 6 – Euteleostei “Modern” Fishes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Lecture 6 – Euteleostei “Modern” Fishes Lecture 6 – Euteleostei “Modern” Fishes - Most advanced group of teleosts - ~ 200 mybp - 20,220 spp or ~60% of all fishes • Euteleostei • Protacanthopterygii • “Others” • Paracanthopterygii • Acanthopterygii Modern Fishes Division Subdivision Superorder Teleostei Osteoglossomorpha Elopomorpha Ostarioclupeomorpha Clupeomorpha Ostaryophysi Euteleostei Protacanthopterygii “Others” Paracanthopterygii Acanthopterygii Subdivision Euteleostei Synapomorphy: Retractor dorsalis – RAB • muscle connects upper pharyngeal jaws to vertebral column • hinged jaw teeth capable of posterior depression The latest classifications (2013) Superorder Protacanthopterygii Osmeriformes (argentines, spookfishes, smelts, salamanderfishes) Superorder Protacanthopterygii Salmoniformes (Salmon, Trout, Grayling) Esociformes (pikes) “Others” Major orders include: • Stomiiformes • Ateleopodiformes • Aulopiformes • Myctophiformes • Lampriformes • Polymixiiformes “Others” Stomiiformes Ateleopodiformes Aulopiformes Lizardfish Hatchetfish jellynose hatchetfish Myctophiformes Lampriformes Polymixiiformes Lanternfish Beardfishes Opah CIMI - Toyon Bay – 10-13-2013 Superorder Paracanthopterygii Major orders include: • Percopsiformes • Gadiformes • Ophidiiformes • Batrachoidiformes • Lophiiformes Superorder Paracanthopterygii Percopsiformes Gadiformes Ophidiiformes Cod Pirate perch -anus by head Lophiiformes Batrachoidiformes Anglerfish, Frogfish mate Midshipman Superorder Acanthopterygii Series Order Mugilomorpha Mugiliformes Atherinomorpha Atheriniformes Beloniformes Cyprinodontiformes Percomorpha 9 orders including Perciformes Acanthopterygii • Most modern fishes belong to this single advanced superorder • Taxonomic work on most groups is ongoing and often unsettled • Dominate shallow, productive habitats of marine and many freshwater environments • not very well represented in the deep Mugilomorpha Mugiliformes (grey mullets) Atherinomorpha – surface champs Melanotaenia spp. Atheriniformes Menidia menidia Cyprinodontiformes Beloniformes Exocoetus Anableps Out of the frying pan…. and into the fire Beloniformes Percomorpha The most advanced Euteleostan clade • diverse and varied • mostly marine • >13,000 spp. or ~39% of all fishes Percomorpha Stephanoberyciformes Beryciformes soldierfishes pricklefishes Beryciformes squirrelfishes - most shallow orange roughy Percomorpha Zeiformes Gasterosteiformes John Dory Syngnathiformes Synbranchiformes Percomorpha Scorpaeniformes Cottids Scorpaenids Hexagrammids Agonids Percomorpha Perciformes Perciformes • currently 11,207 spp. in 164 families • ~ 1/3 of all fishes • largest vertebrate order • six of the eight largest families are predominantly coral reef fishes Percomorpha - Pleuronectiformes Begin life as billaterally symmetrical Percomorpha - Tetraodontiformes Pinnacle of teleostean evolution • lineage with most derived traits • reduced genome size Coral reef fishes past and present Major groups of extant fishes Amazon River & coral reefs hold 70% of all fishes… Near et al. 2013.
Load more

Recommended publications
  • Zoology Marine Ornamental Fish Biodiversity of West Bengal ABSTRACT
    Research Paper Volume : 4 | Issue : 8 | Aug 2015 • ISSN No 2277 - 8179 Zoology Marine Ornamental Fish Biodiversity of KEYWORDS : Marine fish, ornamental, West Bengal diversity, West Bengal. Principal Scientist and Scientist-in-Charge, ICAR-Central Institute of Fisheries Education, Dr. B. K. Mahapatra Salt Lake City, Kolkata-700091, India Director and Vice-Chancellor, ICAR-Central Institute of Fisheries Education, Versova, Dr. W. S. Lakra Mumbai- 400 061, India ABSTRACT The State of West Bengal, India endowed with 158 km coast line for marine water resources with inshore, up-shore areas and continental shelf of Bay of Bengal form an important fishery resource and also possesses a rich wealth of indigenous marine ornamental fishes.The present study recorded a total of 113 marine ornamental fish species, belonging to 75 genera under 45 families and 10 orders.Order Perciformes is represented by a maximum of 26 families having 79 species under 49 genera followed by Tetraodontiformes (5 family; 9 genus and 10 species), Scorpaeniformes (2 family; 3 genus and 6 species), Anguilliformes (2 family; 3 genus and 4 species), Syngnathiformes (2 family; 3 genus and 3 species), Pleuronectiformes (2 family; 2 genus and 4 species), Siluriformes (2 family; 2 genus and 3 species), Beloniformes (2 family; 2 genus and 2 species), Lophiformes (1 family; 1 genus and 1 species), Beryciformes(1 family; 1 genus and 1 species). Introduction Table 1: List of Marine ornamental fishes of West Bengal Ornamental fishery, which started centuries back as a hobby, ORDER 1: PERCIFORMES has now started taking the shape of a multi-billion dollar in- dustry.
    [Show full text]
  • Order BERYCIFORMES ANOPLOGASTRIDAE Fangtooths (Ogrefish) by J.A
    click for previous page 1178 Bony Fishes Order BERYCIFORMES ANOPLOGASTRIDAE Fangtooths (ogrefish) by J.A. Moore, Florida Atlantic University, USA iagnostic characters: Small (to about 160 mm standard length) beryciform fishes.Body short, deep, and Dcompressed, tapering to narrow peduncle. Head large (1/3 standard length). Eye smaller than snout length in adults, but larger than snout length in juveniles. Mouth very large and oblique, jaws extend be- hind eye in adults; 1 supramaxilla. Bands of villiform teeth in juveniles are replaced with large fangs on dentary and premaxilla in adults; vomer and palatines toothless. Deep sensory canals separated by ser- rated ridges; very large parietal and preopercular spines in juveniles of one species, all disappearing with age. Gill rakers as clusters of teeth on gill arch in adults (lath-like in juveniles). No true fin spines; single, long-based dorsal fin with 16 to 20 rays; anal fin very short-based with 7 to 9 soft rays; caudal fin emarginate; pectoral fins with 13 to 16 soft rays; pelvic fins with 7 soft rays. Scales small, non-overlapping, spinose, goblet-shaped in adults; lateral line an open groove partially bridged by scales; no enlarged ventral keel scutes. Colour: entirely dark brown or black in adults. Habitat, biology, and fisheries: Meso- to bathypelagic, at depths of 75 to 5 000 m. Carnivores, with juveniles feeding on mainly crustaceans and adults mainly on fishes. May sometimes swim in small groups. Uncommon deep-sea fishes of no commercial importance. Remarks: The family was revised recently by Kotlyar (1986) and contains 1 genus with 2 species throughout the tropical and temperate latitudes.
    [Show full text]
  • The Phylogeny of Oncorhynchus (Euteleostei: Salmonidae) Based on Behavioral and Life History Characters
    Copeia, 2007(3), pp. 520–533 The Phylogeny of Oncorhynchus (Euteleostei: Salmonidae) Based on Behavioral and Life History Characters MANU ESTEVE AND DEBORAH A. MCLENNAN There is no consensus between morphological and molecular data concerning the relationships within the Pacific basin salmon and trout clade Oncorhynchus. In this paper we add another source of characters to the discussion. Phylogenetic analysis of 39 behavioral and life history traits produced one tree structured (O. clarki (O. mykiss (O. masou (O. kisutch (O. tshawytscha (O. nerka (O. keta, O. gorbuscha))))))). This topology is congruent with the phylogeny based upon Bayesian analysis of all available nuclear and mitochondrial gene sequences, with the exception of two nodes: behavior supports the morphological data in breaking the sister-group relationship between O. mykiss and O. clarki, and between O. kisutch and O. tshawytscha. The behavioral traits agreed with molecular rather than morphological data in placing O. keta as the sister-group of O. gorbuscha. The behavioral traits also resolve the molecular-based ambiguity concerning the placement of O. masou, placing it as sister to the rest of the Pacific basin salmon. Behavioral plus morphological data placed Salmo, not Salvelinus, as more closely related to Oncorhynchus, but that placement was only weakly supported and awaits collection of missing data from enigmatic species such as the lake trout, Salvelinus namaycush. Overall, the phenotypic characters helped resolve ambiguities that may have been created by molecular introgression, while the molecular traits helped resolve ambiguities introduced by phenotypic homoplasy. It seems reasonable therefore, that systematists can best respond to the escalating biodiversity crisis by forming research groups to gather behavioral and ecological information while specimens are being collected for morphological and molecular analysis.
    [Show full text]
  • Atheriniformes : Atherinidae
    Atheriniformes: Atherinidae 2111 Atheriniformes: Atherinidae Order ATHERINIFORMES ATHERINIDAE Silversides by L. Tito de Morais, IRD/LEMAR, University of Brest, Plouzané, France; M. Sylla, Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal and W. Ivantsoff (retired), Biology Science, Macquarie University NSW 2109, North Ryde, Australia iagnostic characters: Small, elongate fish, rarely exceeding 15 cm in length. Body elongate and Dsomewhat compressed. Short head, generally flattened dorsally, large eyes, sharp nose, mouth small, oblique and in terminal position, jaws subequal, reaching or slightly exceeding the anterior margin of the eye; premaxilla with ascending process of variable length, with lateral process present or absent; ramus of dentary bone elevated posteriorly or indistinct from anterior part of lower jaw; fine, small and sharp teeth on the jaws, on the roof of mouth (vomer, palatine, pterygoid) or on outside of mouth; 10 to 26 gill rakers long and slender on lower arm of first gill arch. Two well-separated dorsal fins, the first with 6 to 10 thin, flexible spines, located approximately in the middle of the body; the second dorsal and anal fins with a single small weak spine, 1 unbranched soft ray and a variable number of soft rays. Anal fin always originating slightly in advance of second dorsal fin; pectoral fins inserted high on the flanks, directly behind posterior rim of gill cover, with spine greatly reduced and first ray much thicker than those following. Abdomninal pelvic fins with 1 spine and 5 soft rays; forked caudal fin; anus away from the origin of the anal fin. Relatively large scales, cycloid (smooth).
    [Show full text]
  • BONY FISHES 602 Bony Fishes
    click for previous page BONY FISHES 602 Bony Fishes GENERAL REMARKS by K.E. Carpenter, Old Dominion University, Virginia, USA ony fishes constitute the bulk, by far, of both the diversity and total landings of marine organisms encoun- Btered in fisheries of the Western Central Atlantic.They are found in all macrofaunal marine and estuarine habitats and exhibit a lavish array of adaptations to these environments. This extreme diversity of form and taxa presents an exceptional challenge for identification. There are 30 orders and 269 families of bony fishes presented in this guide, representing all families known from the area. Each order and family presents a unique suite of taxonomic problems and relevant characters. The purpose of this preliminary section on technical terms and guide to orders and families is to serve as an introduction and initial identification guide to this taxonomic diversity. It should also serve as a general reference for those features most commonly used in identification of bony fishes throughout the remaining volumes. However, I cannot begin to introduce the many facets of fish biology relevant to understanding the diversity of fishes in a few pages. For this, the reader is directed to one of the several general texts on fish biology such as the ones by Bond (1996), Moyle and Cech (1996), and Helfman et al.(1997) listed below. A general introduction to the fisheries of bony fishes in this region is given in the introduction to these volumes. Taxonomic details relevant to a specific family are explained under each of the appropriate family sections. The classification of bony fishes continues to transform as our knowledge of their evolutionary relationships improves.
    [Show full text]
  • §4-71-6.5 LIST of CONDITIONALLY APPROVED ANIMALS November
    §4-71-6.5 LIST OF CONDITIONALLY APPROVED ANIMALS November 28, 2006 SCIENTIFIC NAME COMMON NAME INVERTEBRATES PHYLUM Annelida CLASS Oligochaeta ORDER Plesiopora FAMILY Tubificidae Tubifex (all species in genus) worm, tubifex PHYLUM Arthropoda CLASS Crustacea ORDER Anostraca FAMILY Artemiidae Artemia (all species in genus) shrimp, brine ORDER Cladocera FAMILY Daphnidae Daphnia (all species in genus) flea, water ORDER Decapoda FAMILY Atelecyclidae Erimacrus isenbeckii crab, horsehair FAMILY Cancridae Cancer antennarius crab, California rock Cancer anthonyi crab, yellowstone Cancer borealis crab, Jonah Cancer magister crab, dungeness Cancer productus crab, rock (red) FAMILY Geryonidae Geryon affinis crab, golden FAMILY Lithodidae Paralithodes camtschatica crab, Alaskan king FAMILY Majidae Chionocetes bairdi crab, snow Chionocetes opilio crab, snow 1 CONDITIONAL ANIMAL LIST §4-71-6.5 SCIENTIFIC NAME COMMON NAME Chionocetes tanneri crab, snow FAMILY Nephropidae Homarus (all species in genus) lobster, true FAMILY Palaemonidae Macrobrachium lar shrimp, freshwater Macrobrachium rosenbergi prawn, giant long-legged FAMILY Palinuridae Jasus (all species in genus) crayfish, saltwater; lobster Panulirus argus lobster, Atlantic spiny Panulirus longipes femoristriga crayfish, saltwater Panulirus pencillatus lobster, spiny FAMILY Portunidae Callinectes sapidus crab, blue Scylla serrata crab, Samoan; serrate, swimming FAMILY Raninidae Ranina ranina crab, spanner; red frog, Hawaiian CLASS Insecta ORDER Coleoptera FAMILY Tenebrionidae Tenebrio molitor mealworm,
    [Show full text]
  • Phylogeny Classification Additional Readings Clupeomorpha and Ostariophysi
    Teleostei - AccessScience from McGraw-Hill Education http://www.accessscience.com/content/teleostei/680400 (http://www.accessscience.com/) Article by: Boschung, Herbert Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama. Gardiner, Brian Linnean Society of London, Burlington House, Piccadilly, London, United Kingdom. Publication year: 2014 DOI: http://dx.doi.org/10.1036/1097-8542.680400 (http://dx.doi.org/10.1036/1097-8542.680400) Content Morphology Euteleostei Bibliography Phylogeny Classification Additional Readings Clupeomorpha and Ostariophysi The most recent group of actinopterygians (rayfin fishes), first appearing in the Upper Triassic (Fig. 1). About 26,840 species are contained within the Teleostei, accounting for more than half of all living vertebrates and over 96% of all living fishes. Teleosts comprise 517 families, of which 69 are extinct, leaving 448 extant families; of these, about 43% have no fossil record. See also: Actinopterygii (/content/actinopterygii/009100); Osteichthyes (/content/osteichthyes/478500) Fig. 1 Cladogram showing the relationships of the extant teleosts with the other extant actinopterygians. (J. S. Nelson, Fishes of the World, 4th ed., Wiley, New York, 2006) 1 of 9 10/7/2015 1:07 PM Teleostei - AccessScience from McGraw-Hill Education http://www.accessscience.com/content/teleostei/680400 Morphology Much of the evidence for teleost monophyly (evolving from a common ancestral form) and relationships comes from the caudal skeleton and concomitant acquisition of a homocercal tail (upper and lower lobes of the caudal fin are symmetrical). This type of tail primitively results from an ontogenetic fusion of centra (bodies of vertebrae) and the possession of paired bracing bones located bilaterally along the dorsal region of the caudal skeleton, derived ontogenetically from the neural arches (uroneurals) of the ural (tail) centra.
    [Show full text]
  • Age, Growth and Body Condition of Big-Scale Sand Smelt Atherina Boyeri Risso, 1810 Inhabiting a Freshwater Environment: Lake Trasimeno (Italy)
    Knowledge and Management of Aquatic Ecosystems (2015) 416, 09 http://www.kmae-journal.org c ONEMA, 2015 DOI: 10.1051/kmae/2015005 Age, growth and body condition of big-scale sand smelt Atherina boyeri Risso, 1810 inhabiting a freshwater environment: Lake Trasimeno (Italy) M. Lorenzoni(1), D. Giannetto(2),,A.Carosi(1), R. Dolciami(3), L. Ghetti(4), L. Pompei(1) Received September 24, 2014 Revised January 29, 2015 Accepted January 29, 2015 ABSTRACT Key-words: The age, growth and body condition of the big-scale sand smelt (Athe- Population rina boyeri) population of Lake Trasimeno were investigated. In total, dynamics, 3998 specimens were collected during the study and five age classes Lee’s (from 0+ to 4+) were identified. From a subsample of 1017 specimens, phenomenon, there were 583 females, 411 males and 23 juveniles. The equations = − fishery between total length (TL) and weight (W) were: log10 W 2.326 + = − management, 3.139 log10 TL for males and log10 W 2.366 + 3.168 log10 TL for fe- introduced males. There were highly significant differences between the sexes and species, for both sexes the value of b (slope of the log (TL-W regression) was Lake Trasimeno greater than 3 (3.139 for males and 3.168 for females), indicating positive allometric growth. The parameters of the theoretical growth curve were: −1 TLt = 10.03 cm; k = 0.18 yr , t0 = −0.443 yr and Φ = 1.65. Monthly trends of overall condition and the gonadosomatic index (GSI) indicated that the reproductive period occurred from March to September. Analy- sis of back-calculated lengths indicated the occurrence of a reverse Lee’s phenomenon.
    [Show full text]
  • Appendix 1. (Online Supplementary Material) Species, Gliding Strategies
    Appendix 1. (Online Supplementary Material) Species, gliding strategies, species distributions, geographic range sizes, habitat, and egg buoyancy characteristics used for concentrated changes tests. Species Gliding strategy Species distribution (reference #) Geographic range size Habitat (reference #) Egg buoyancy (reference #) Cheilopogon abei (Parin, 1996) 4 wings Indian, Indo-Pacific (1) 2 or more ocean basins meroepipelagic (1) Buoyant (2) Cheilopogon atrisignis (Jenkins, 1903) 4 wings Indian, Pacific (1) 2 or more ocean basins meroepipelgic (3) Buoyant (4) Cheilopogon cyanopterus (Valenciennes, 1847) 4 wings Atlantic, Indo-Pacific (2) 2 or more ocean basins meroepipelgic (3) Non-Buoyant (5) Cheilopogon dorsomacula (Fowler, 1944) 4 wings Pacific (1) within 1 ocean basin holoepipelagic (1) Buoyant (2) Cheilopogon exsiliens (Linnaeus, 1771) 4 wings Atlantic (2) within 1 ocean basin holoepipelagic (3) Buoyant (2,5) Cheilopogon furcatus (Mitchill, 1815) 4 wings Atlantic, Indian, Pacific (6) 2 or more ocean basins holoepipelagic (3) Non-Buoyant (5) Cheilopogon melanurus (Valenciennes, 1847) 4 wings Atlantic (7) within 1 ocean basin meroepipelagic (7) Non-Buoyant (5,8) Cheilopogon pinnatibarbatus (californicus) (Cooper, 1863) 4 wings eastern tropical Pacific (9) within 1 ocean basin meroepipelgic (3) Non-Buoyant (10) Cheilopogon spilonotopterus (Bleeker, 1865) 4 wings Indian and Pacific (1) 2 or more ocean basins meroepipelgic (3) Buoyant (4) Cheilopogon xenopterus (Gilbert, 1890) 4 wings eastern tropical Pacific (11) within 1 ocean basin
    [Show full text]
  • CHECKLIST and BIOGEOGRAPHY of FISHES from GUADALUPE ISLAND, WESTERN MEXICO Héctor Reyes-Bonilla, Arturo Ayala-Bocos, Luis E
    ReyeS-BONIllA eT Al: CheCklIST AND BIOgeOgRAphy Of fISheS fROm gUADAlUpe ISlAND CalCOfI Rep., Vol. 51, 2010 CHECKLIST AND BIOGEOGRAPHY OF FISHES FROM GUADALUPE ISLAND, WESTERN MEXICO Héctor REyES-BONILLA, Arturo AyALA-BOCOS, LUIS E. Calderon-AGUILERA SAúL GONzáLEz-Romero, ISRAEL SáNCHEz-ALCántara Centro de Investigación Científica y de Educación Superior de Ensenada AND MARIANA Walther MENDOzA Carretera Tijuana - Ensenada # 3918, zona Playitas, C.P. 22860 Universidad Autónoma de Baja California Sur Ensenada, B.C., México Departamento de Biología Marina Tel: +52 646 1750500, ext. 25257; Fax: +52 646 Apartado postal 19-B, CP 23080 [email protected] La Paz, B.C.S., México. Tel: (612) 123-8800, ext. 4160; Fax: (612) 123-8819 NADIA C. Olivares-BAñUELOS [email protected] Reserva de la Biosfera Isla Guadalupe Comisión Nacional de áreas Naturales Protegidas yULIANA R. BEDOLLA-GUzMáN AND Avenida del Puerto 375, local 30 Arturo RAMíREz-VALDEz Fraccionamiento Playas de Ensenada, C.P. 22880 Universidad Autónoma de Baja California Ensenada, B.C., México Facultad de Ciencias Marinas, Instituto de Investigaciones Oceanológicas Universidad Autónoma de Baja California, Carr. Tijuana-Ensenada km. 107, Apartado postal 453, C.P. 22890 Ensenada, B.C., México ABSTRACT recognized the biological and ecological significance of Guadalupe Island, off Baja California, México, is Guadalupe Island, and declared it a Biosphere Reserve an important fishing area which also harbors high (SEMARNAT 2005). marine biodiversity. Based on field data, literature Guadalupe Island is isolated, far away from the main- reviews, and scientific collection records, we pres- land and has limited logistic facilities to conduct scien- ent a comprehensive checklist of the local fish fauna, tific studies.
    [Show full text]
  • Edna Assay Development
    Environmental DNA assays available for species detection via qPCR analysis at the U.S.D.A Forest Service National Genomics Center for Wildlife and Fish Conservation (NGC). Asterisks indicate the assay was designed at the NGC. This list was last updated in June 2021 and is subject to change. Please contact [email protected] with questions. Family Species Common name Ready for use? Mustelidae Martes americana, Martes caurina American and Pacific marten* Y Castoridae Castor canadensis American beaver Y Ranidae Lithobates catesbeianus American bullfrog Y Cinclidae Cinclus mexicanus American dipper* N Anguillidae Anguilla rostrata American eel Y Soricidae Sorex palustris American water shrew* N Salmonidae Oncorhynchus clarkii ssp Any cutthroat trout* N Petromyzontidae Lampetra spp. Any Lampetra* Y Salmonidae Salmonidae Any salmonid* Y Cottidae Cottidae Any sculpin* Y Salmonidae Thymallus arcticus Arctic grayling* Y Cyrenidae Corbicula fluminea Asian clam* N Salmonidae Salmo salar Atlantic Salmon Y Lymnaeidae Radix auricularia Big-eared radix* N Cyprinidae Mylopharyngodon piceus Black carp N Ictaluridae Ameiurus melas Black Bullhead* N Catostomidae Cycleptus elongatus Blue Sucker* N Cichlidae Oreochromis aureus Blue tilapia* N Catostomidae Catostomus discobolus Bluehead sucker* N Catostomidae Catostomus virescens Bluehead sucker* Y Felidae Lynx rufus Bobcat* Y Hylidae Pseudocris maculata Boreal chorus frog N Hydrocharitaceae Egeria densa Brazilian elodea N Salmonidae Salvelinus fontinalis Brook trout* Y Colubridae Boiga irregularis Brown tree snake*
    [Show full text]
  • Acanthopterygii, Bone, Eurypterygii, Osteology, Percomprpha
    Research in Zoology 2014, 4(2): 29-42 DOI: 10.5923/j.zoology.20140402.01 Comparative Osteology of the Jaws in Representatives of the Eurypterygian Fishes Yazdan Keivany Department of Natural Resources (Fisheries Division), Isfahan University of Technology, Isfahan, 84156-83111, Iran Abstract The osteology of the jaws in representatives of 49 genera in 40 families of eurypterygian fishes, including: Aulopiformes, Myctophiformes, Lampridiformes, Polymixiiformes, Percopsiformes, Mugiliformes, Atheriniformes, Beloniformes, Cyprinodontiformes, Stephanoberyciformes, Beryciformes, Zeiformes, Gasterosteiformes, Synbranchiformes, Scorpaeniformes (including Dactylopteridae), and Perciformes (including Elassomatidae) were studied. Generally, in this group, the upper jaw consists of the premaxilla, maxilla, and supramaxilla. The lower jaw consists of the dentary, anguloarticular, retroarticular, and sesamoid articular. In higher taxa, the premaxilla bears ascending, articular, and postmaxillary processes. The maxilla usually bears a ventral and a dorsal articular process. The supramaxilla is present only in some taxa. The dentary is usually toothed and bears coronoid and posteroventral processes. The retroarticular is small and located at the posteroventral corner of the anguloarticular. Keywords Acanthopterygii, Bone, Eurypterygii, Osteology, Percomprpha following method for clearing and staining bone and 1. Introduction cartilage provided in reference [18]. A camera lucida attached to a Wild M5 dissecting stereomicroscope was used Despite the introduction of modern techniques such as to prepare the drawings. The bones in the first figure of each DNA sequencing and barcoding, osteology, due to its anatomical section are arbitrarily shaded and labeled and in reliability, still plays an important role in the systematic the others are shaded in a consistent manner (dark, medium, study of fishes and comprises a major percent of today’s and clear) to facilitate comparison among the taxa.
    [Show full text]