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Type: Articles
Published: 2012-11-28
Page range: 31–43
Abstract views: 75
PDF downloaded: 3

A new species of Trichonotus (Perciformes: Trichonotidae) from Somalia and redescription of Trichonotus cyclograptus (Alcock, 1890) with designation of a lectotype

Department of Zoology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
The Kagoshima University Museum, 1-21-30 Korimoto, Kagoshima 890-0065, Japan
Laboratory of Marine Biology, Faculty of Science, Kochi University, 2–5–1 Akebono–cho, Kochi 780–8520, Japan
Fish Trichonotidae Trichonotus cyclograptus Trichonotus somaliensis new species sand diver redescription Somalia

Abstract

A new sand diver Trichonotus somaliensis n. sp. (Trichonotidae) is described on the basis of 13 specimens collected offthe coast of Somalia at a depth of 38−78m. The new species is most similar to T. arabicus and T. cyclograptus in lackingelongated anterior dorsal-fin spines and having dark markings on the lateral body surface in males. However, the new spe-cies differs from the others in having the following characters: lateral-line scales 54−57; gill rakers on first arch5−6+18−24; 12–14 blotches on upper half of body in both sexes; first dorsal-fin soft ray length in males 19–28% of stan-dard length; and no free dorsal pterygiophores. Trichonotus cyclograptus, a poorly known species, is redescribed on the basis of the newly-designated lectotype and paralectotypes.

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