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Author:
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ISBN:
Category : Fisheries
Languages : en
Pages : 798
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 798
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Book Description
Author: Lee C. Thorson
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 36
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Book Description
Author: David M. Damkaer
Publisher:
ISBN:
Category : Calanoida
Languages : en
Pages : 560
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Book Description
Author: John Laurence McHugh
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 60
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Book Description
Author: Labbish Ning Chao
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 76
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Book Description
Sciaenidae of the western Atlantic consist of 21 genera and at least 57 species, and are placed in 11 suprageneric groups: Cynoscion, Larimus, Lonchurus, Menticirrhus, Micropogonias, Nebria, Pogonias, Sciaena, Sciaenops, Stellifer, and Umbrina groups. The phylogenetic relationships of all western Atlantic genera are assessed on the basis of swim bladder, otoliths (sagitta and lapillus), and external morphology. The stellifer group differs from all other western Atlantic sciaenids in having a two-chambered swim bladder and an enlarged lapillus. Phylogenetic and ontogenetic trends of the swim bladder range from a simple carrot-shape, to a more complicated structure with anterior projections and horns, to a very complicated lateral diverticula system. The sagitta is usually oval or elongate in shape. The thickness and the impression of the sulcus on the inner surface of the sagitta are diagnostic among genera. External morphology is adaptive, especially in relation to feeding habits and habitat, but a trend is evident in that closely related genera often have similar body shapes, mouth positions, and other external features. Species of the genus Stellifer are exceptions in having diverse mouth positions and feeding habits. The synopsis section of the paper includes a diagnosis, a primary synonymy, and lists of types of nominal species for each taxonomic category. Four genera and 22 nominal species of New World freshwater sciaenids are also included. Nomenclatural changes in regard to the genus Micropogon (to Micropogonias) and for the species Bairdiella chrysura (to B. chrysoura) is given. A tested key to species and genera of all western Atlantic sciaenids is included. This paper is designed to serve as a basis for further revision of western Atlantic sciaenids.
Author: Stephen A. Bortone
Publisher:
ISBN:
Category : Sea basses
Languages : en
Pages : 60
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Book Description
Author: David Leo Pawson
Publisher:
ISBN:
Category : Echinodermata
Languages : en
Pages : 24
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Book Description
Author: Bruce C. Coull
Publisher:
ISBN:
Category : Copepoda
Languages : en
Pages : 56
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Book Description
Author: James Edwin Morrow
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 294
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Book Description
Author: Daniel M. Cohen
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 84
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Book Description
Objectives of the paper are to provide dichotomous keys for the identification of ophidiiform genera. For each genus a brief account is presented including synonymy, a short diagnosis, a list of species, distribution, references, when possible comments on relationships, and for most an outline drawing. The genera are organized into an hierarchical classification which divides them into two suborders, Ophidioidei, which contains oviparous fishes with a high anterior nostril, and Bythitoidei which contains viviparous fishes with a low anterior nostril. Ophidioidei is divided into two families. Carapidae, with a vexillifer larval stage, has two subfamilies: Pyramodontinae with two genera and Carapinae with four. Ophidiidae has four subfamilies: Brotulinae, with a single genus; Brotulotaeniinae (new family) with a single genus; Ophidiinae, the cusk eels, with eight genera in two tribes; and Neobythitinae, with 38 genera (Epetriodus and Spottobrotula are new genera based on new species from the Indian Ocean) in two tribes. Bythitoidei contains two families, one of which, Aphyonidae has five genera characterized by many neotenic features. Bythitidae is divided into the free-tailed Brosmophycinae with 13 genera in two tribes and Bythitinae with 15 genera.
