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Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 742
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Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 742
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 834
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 708
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Author: David Leo Pawson
Publisher:
ISBN:
Category : Echinodermata
Languages : en
Pages : 24
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Author: Eugene C. Bovee
Publisher:
ISBN:
Category : Amoeba
Languages : en
Pages : 64
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Book Description
This manual contains a key to 15 families of freshwater and marine amoebae, of which one the Echinamoebidae, does not contain a known marine species. Diagnostic features for 49 genera, of which 34 include marine species, also are given. Descriptions and illustrations for 76 species of marine amoebae and an annotated systematic list are provided. The basic key is designed to assist the user in the identification of recognized species of marine amoebae that have been described from waters of the northeastern United States. However, certain well-known families and genera of freshwater forms are included to assist in their identification should they be discovered in seawater in future investigations. Information also is provided which includes comments on the general biology of the Amoebida, and techniques for microscopic observations and laboratory cultivation of many species. Most of the amoebae described in the key are free living, but a few are parasitic and known to be of considerable economic importance. One new free-living species, Vexillifera minutissima, was discovered in Chincoteague Bay, Va., and is described herein for the first time.
Author: Daniel M. Cohen
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 84
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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.
Author: H. Geoffrey Moser
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 84
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Author: Stewart Springer
Publisher:
ISBN:
Category : Scyliorhinidae
Languages : en
Pages : 162
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Author: John Laurence McHugh
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 60
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Author: Edward B. Cutler
Publisher:
ISBN:
Category : Marine animals
Languages : en
Pages : 16
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