fin ray counts
see the fin concerned; see also fin formula

Dictionary of ichthyology. 2009.

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  • anal fin ray count — enumeration of the soft anal fin rays. In fishes where the smaller rays in front gradually grade into larger rays, these smaller anterior rays are included in the count, e.g. Ictaluridae, Esocidae, Gadidae. Where the first small rays abruptly… …   Dictionary of ichthyology

  • dorsal fin ray count — enumeration of the soft dorsal fin rays. In fishes where the smaller rays in front gradually grade into larger rays, these smaller anterior rays are included in the count, e.g. Ictaluridae, Esocidae, Gadidae. Where the first small rays abruptly… …   Dictionary of ichthyology

  • ray — 1) a ray (excluding spines) is a flexible, rod like segmented and often branched, bilaterally paired fin support of dermal origin. Rays may be divided into soft rays (as just described) and hard rays or pseudacanths which are ossified, inflexible …   Dictionary of ichthyology

  • fin formula — in old works the dorsal, ventral, and anal fin counts were each presented as a formula with the spine count the numerator above the ray count, e.g. D. 20 /14 15 means 20 spines and 14 to 15 rays in the fin …   Dictionary of ichthyology

  • pectoral fin — the paired fin borne by the pectoral girdle, usually just behind the gill opening or slightly dorsal or ventral to this position. Also called omopterygium or homopterygium. This fin is generally larger than the pelvic fin and less variable in… …   Dictionary of ichthyology

  • rudimentary ray — a simple fin ray usually an unbranched, unsegmented soft ray, often too small or obscure to include in counts …   Dictionary of ichthyology

  • Coachwhip trevally — Scientific classification Kingdom: Animalia Phylum …   Wikipedia

  • African threadfish — Taxobox name = African threadfish regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes subordo = Percoidei superfamilia = Percoidea familia = Carangidae genus = Alectis species = A. alexandrinus binomial = Alectis… …   Wikipedia

  • homopterygium — (plural homopterygia)) pectoral fin (the paired fin born by the pectoral girdle, usually just behind the gill opening or slightly dorsal or ventral to this position. Also called omopterygium or homopterygium. This fin is generally larger than the …   Dictionary of ichthyology

  • omopterygium — (plural omopterygia)) pectoral fin (the paired fin born by the pectoral girdle, usually just behind the gill opening or slightly dorsal or ventral to this position. Also called homopterygium. This fin is generally larger than the pelvic fin and… …   Dictionary of ichthyology

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