Studies on the Acoustico-Lateralis System of Beloniform Fishes in Connection with Their Systematics
1982; American Society of Ichthyologists and Herpetologists; Volume: 1982; Issue: 2 Linguagem: Inglês
10.2307/1444606
ISSN1938-5110
Autores Tópico(s)Fish biology, ecology, and behavior
ResumoComparisons are made among the lateralis systems of 32 species from 24 genera representing the four families of beloniform fishes-Scomberesocidae, Belonidae, Hemiramphidae and Exocoetidae. Characters of the lateralis system are diagnostic at levels from suborders to genera and subgenera. All Scomberesocoidei (except the Elassichthys) have a premaxillary canal, unique among teleosts. The Scomberesocidae differs from the Belonidae in 5 characters of the lateralis system such as the presence of a pectoral branch in the Belonidae and absence in the Scomberesocidae. Elassichthys has reduced cranial canals compared to other Scomberesocidae as do other dwarf genera of beloniforms, Belonion in the Belonidae, Dermogenys in the Hemiramphidae. Belone and Platybelone resemble each other and differ from Strongylura, Tylosurus and Ablennes in having connected instead of isolated parts of the canalis frontalis. The genera of Hemiramphidae are distinguished by a combination of characters. Hemiramphus and Rhynchorhamphus have two pectoral branches. The two subgenera of Hyporhamphus differ conspicuously in the shape of the lacrimal canal (simple tube in Hyporhamphus versus T-shaped in Reporhamphus) and other characters and may be worthy of full generic status. Fodiator is distinct from other Exocoetidae but shares some characters with Parexocoetus. The genera of Cypselurinae--Prognichthys, Cypselurus, Cheilopogon and Hirundichthys lack distinct differences.
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