Bulletin of the Mizunami Fossil Museum No. 45
Establishment of a new genus for Callianassa (s.l.) sakakuraorum Karasawa, 2000 (Decapoda: Axiidea)
- BMFM45-006Karasawa&Ohara, 2019（PDF 4.98MB）
Karasawa & Ohara (2019) print-version
Published: 2019/3/15 Page: 33–42
Re-examination of the type and additional specimens of Callianassa (s.l.) sakakuraorum Karasawa, 2000, from the Arida Formation (Barremian, Lower Cretaceous) of Japan, shows that Callianassa (s.l.) sakakuraorum is moved to Micheleidae Sakai, 1992, from Callianassidae Dana, 1852. Amatukamius, a new monotypic genus is proposed for Callianassa (s.l.) sakakuraorum. A re-description is given for the species. The occurrence of Amatukamius from the Barremian of Japan represents the oldest record for Micheleidae.