Descriptions of phyllosoma larvae of Scyllarus bicuspidatus and S. cultrifer (Decapoda, Scyllaridae) collected in Japanese waters

概要

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For understanding larval recruitment processes of Scyllarus and Panulirus lobsters, exact species identification of field-caught phyllosoma larvae, particularly those of the early stages, is essential. Using ichthyoplankton samples from waters along the west coast of Kyushu to the Japan Sea coast of Honshu and the Kuroshio and Kuroshio-Counter Current regions, we described morphological features of the I to VIII (final) stage phyllosoma larvae of S. bicuspidatus and the IV to VIII stage larvae of S. cultrifer. The larvae of equivalent stages of two Scyllarus species are distinguishable from each other by using the combinations of body lengths and morphological features of antennules, pereiopods and pleopods. In addition, a) equivalent larval stages in S. cultifer are always larger than in S. bicuspidatus; b) cephalic shield of S. bicuspidatus is rounder than in S. cultrifer; c) relative to antennule length, the eyestalk is longer in S. cultrifer than in S. bicuspidatus.
日本プランクトン学会、日本ベントス学会の論文
2006-02-01