By Philip A. Hastings, H. J. Walker Jr., Grantly R. Galland
There are greater than 33,000 species of dwelling fishes, accounting for greater than half the extant vertebrate variety in the world. This special and entire reference showcases the fundamental anatomy and variety of all eighty two orders of fishes and greater than one hundred fifty of the main in most cases encountered households, concentrating on their unique features.
Accurate identity of every staff, together with its distinguishing features, is supported with transparent photos of preserved specimens, essentially from the information of the Marine Vertebrate assortment at Scripps establishment of Oceanography. This diagnostic details is supplemented by means of radiographs, extra illustrations of quite various lineages, and key references and ecological info for every group.
An perfect spouse to fundamental ichthyology texts, Fishes: A consultant to Their variety provides a huge evaluate of fish morphology prepared in a latest category approach for college students, fisheries scientists, marine biologists, vertebrate zoologists, and daily naturalists. This survey of the main speciose staff of vertebrates on the earth will extend the appreciation of and curiosity within the notable variety of fishes.
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Extra resources for Fishes: A Guide to Their Diversity
SELACHII—Sharks The Selachii includes all species of sharks and is characterized by lateral gill openings and pectoral fins separate from the head (Nelson, 2006). , 2012). , 2005; Shirai, 1996; Vélez-Zuazo and Agnarsson, 2011), including Maisey et al. (2004), who recognized two major lineages, the Squalomorphii and the Galeomorphii. Hypothesized phylogenetic relationships of the Selachii (sharks) after Maisey et al. (2004) and Musick and Ellis (2005). 24 Chondrichthyes HETERODONTIFORMES: HETERODONTIDAE—Bullhead Sharks DIVERSITY: 1 genus, 9 species REPRESENTATIVE GENUS : Heterodontus DISTRIBUTION : Indian and Pacific oceans HABITAT: Marine; tropical to warm temperate; continental shelf (one species on continental slope), benthic to demersal including shallow rocky or coral reefs REMARKS : Members of the family of bullhead sharks are characterized by their distinctive dorsal fins and blunt snouts.
ORECTOLOBIFORMES : GINGLYMOSTOMATIDAE— Nurse Sharks DIVERSITY: 1 family, 3 genera, 3 species REPRESENTATIVE GENERA : Ginglymostoma, Nebrius, Pseudoginglymostoma DISTRIBUTION : Atlantic, Indian, and Pacific oceans HABITAT: Marine; tropical to subtropical; continental shelf, benthic on shallow reefs and adjacent sandy areas REMARKS : Nurse sharks are characterized by their brownish coloration and by dorsal fins located far back on the body. They are generally nocturnal and can be observed resting in small groups on the reef or sandy surfaces during the day.
Extant members lack pelvic fins, have pore-like rather than slit-like gill openings and an elongate, eel-like body. Agnathans have a well-developed notochord; a rudimentary vertebral column is present only in the lampreys. The group has a rich fossil record, and many of the extinct members had a bony external skeleton that is lacking in living representatives whose entire skeleton is cartilaginous. Extant agnathans include two major lineages, the hagfishes (Myxiniformes) and the lampreys (Petromyzontiformes).