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NamePoss, S.G. & H.T. Boschung (1996). Lancelets (Cephalochordata: Branchiostomatidae): How many species are valid? Isr. J. Zool 42 (Suppl):S13-S66
AuthorsPoss, S. G.; Boschung, H. T.
TitleLancelets (Cephalochordata: Branchiostomatidae): How many species are valid
JournalIsr. J. Zool
Type Publication
AbstractFifty specific and ten generic names have been applied to lancelets living in tropical and subtropical oceans. About 29 of the names represent valid taxa, distinguishable on the basis of meristic variation and assignable to the genera Branchiostoma and Epigonichthys. Branchiostoma has gonads on both sides of the body and its bilateral metapleural folds terminate immediately posterior to the atriopore. Epigonichthys normally has gonads present on the right side only and the metapleural fold of the left side is confluent with the anterior terminus of the caudal fin. Traditionally, myomere counts, counts of fin chambers, position of atriopore and anus, and qualitative differences in notochord and caudal fin shape have been used to distinguish species. Multivariate analysis of meristic variation, using primarily American species, reveals considerable intraspecific variability in key taxonomic features. Some species exhibit wide variation in countable segments, whereas others are characterized by a narrow range. This report includes primary synonymies, diagnoses, distributions, and nomenclatural remarks for all taxa recognized.
Checked: verified by a taxonomic editorBranchiostoma lanceolatum (Pallas, 1774) (additional source)
Aldabra for Branchiostoma arabiae Webb, 1957
East Africa for Branchiostoma lanceolatum (Pallas, 1774)
Madagascar for Branchiostoma belcheri Gray, 1847
Madagascar for Epigonichthys maldivensis (Forster Cooper, 1903)
Mozambique for Branchiostoma bazarutense Gilchrist, 1923
South Africa (country) for Branchiostoma belcheri Gray, 1847
South Africa (country) for Branchiostoma capense Gilchrist, 1902
Tanzania for Epigonichthys cultellus Peters, 1877
Tanzania for Epigonichthys maldivensis (Forster Cooper, 1903)
Tanzania for Heteropleuron maldivense Forster Cooper, 1903
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