Chasmagnathus Explained

Chasmagnathus convexus is a common mud-flat crab of the family Varunidae, which is endemic to East Asia.[1] [2] In Japan, this crab is commonly called hamagani. This crab has two forms that differ in color; one is olive green and the other is purple.[1] Differences in diet are believed to be responsible for the color variation between the two forms. C. convexus is large, relative to related crabs, and can reach 4.5cmto5cmcm (01.8inchesto02inchescm) wide across its carapace.[3] It is predominantly nocturnal.[1]

Notes and References

  1. Hsi-Te Shih . Hiroshi Suzuki . 2008 . Taxonomy, phylogeny, and biogeography of the endemic mudflat crab Helice/Chasmagnathus complex (Crustacea: Brachyura: Varunidae) from East Asia . . 47 . 1 . 114–125 . 2014-08-18 . 2017-08-09 . https://web.archive.org/web/20170809075913/http://zoolstud.sinica.edu.tw/Journals/47.1/114.pdf . dead .
  2. Web site: Chasmagnathus convexus . Crabs of Japan . Katsushi Sakai . January 16, 2009.
  3. Miyasaka . Hitoshi . Genkai-Kato . Motomi . Goda . Yukiko . Yukiko Goda . Omori . Koji . 2007 . Length-weight relationships of two varunid crab species, Helice tridens and Chasmagnathus convexus, in Japan . . 8 . 1 . 81–83 . 10.1007/s10201-006-0195-8 . 23289023.

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