The rare porcelain crab Novorostrum decorocrus Osawa, 1998 (Anomura: Porcellanidae) from Indonesia

Luciane Augusto De Azevedo Ferreira,Marcos Tavares

doi:10.1590/2358-2936e2020007

Abstract

Abstract Novorostrum decorocrus Osawa, 1998, so far only known from its type locality, Iriomote Island, Ryukyu Islands, southern Japan, is herein recorded from much farther south, Ambon Island, Indonesia. Males and females of N. decorocrus differ from each other in some morphological traits and their morphological differences are also discussed and illustrated. The female of N. decorocrus is illustrated for the first time. The present record of N. decorocrus from Indonesia lends empirical support to a previous proposition, based on the duration of 12-14 days of the planktonic period of the zoeal phase, that the distribution range of N. decorocrus could possibly be wider than known at that time.

Highlights

Osawa (1998) established the genus Novorostrum for Petrolisthes indicus DeMan, 1893, a species originally described from the Flores Island, Indonesia, CORRESPONDING AUTHOR and subsequently found in Lombok (Indonesia), Mindanao (Philippines), Taiwan and south Japan
Novorostrum currently consists of four Indo-West Pacific species, namely N. decorocrus, N. indicum, N. phuketense, and N. securiger
The Indonesian specimens agree well with Novorostrum decorocrus from the Ryukyu Islands as described and illustrated by Osawa (1998): (i) cheliped propodus bluntly toothed along the extensor margin, and with a weak crenulated longitudinal ridge adjacent to the extensor margin on the dorsal surface (Figs. 1B; 2B, E); (ii) cheliped carpus with several, small, acute or blunt teeth on the dorsal flexor margin (Figs. 1B; 2B, E); and (iii) propodus and carpus of P2–P4 bluntly toothed on the extensor margins (Figs. 1C; 2C, F)

Summary

Introduction

Osawa (1998) established the genus Novorostrum for Petrolisthes indicus DeMan, 1893, a species originally described from the Flores Island, Indonesia, CORRESPONDING AUTHOR and subsequently found in Lombok (Indonesia), Mindanao (Philippines), Taiwan and south Japan. Osawa (1998) established the genus Novorostrum for Petrolisthes indicus De Osawa described two additional new species in Novorostrum, N. decorocrus Osawa, 1998

Results

Conclusion