Morphology of the first three zoeal stages of the deep-sea caridean shrimp Heterocarpus fascirostratus Yang, Chan & Kumar, 2018 (Crustacea, Decapoda, Pandalidae).

Guo-Chen Jiang,Tin-Yam Chan

doi:10.3897/zookeys.1042.64407

Abstract

The larvae of the deep-sea pandalid shrimp Heterocarpus fascirostratus Yang, Chan & Kumar, 2018 were successfully hatched and cultured to the third zoeal stage. The larvae reached the third zoeal stage nine days after hatching at a water temperature of 21 ± 1 °C. Although members of Heterocarpus A. Milne-Edwards, 1881 have rather diverse body forms and are often separated into many species groups, the early zoeal morphology of H. fascirostratus follows the general developmental pattern of the species in Heterocarpus. The main differences amongst these larvae are body size, spines on the anteroventral margin of the carapace, and the endopod setation of the third maxilliped.

Highlights

The deep-sea pandalid shrimp genus Heterocarpus A
An ovigerous female of H. fascirostratus was captured by the research vessel ‘Ocean Researcher I’ with a French beam trawl at depths of 420–444 m off Dongsha Island (Pratas, Taiwan, 20°44.857'N, 116°08.010'E) in the South China Sea
About 80% of the larvae developed to Zoea II, but only two larvae moulted to Zoea III and the rearing terminated

Summary

Introduction

The deep-sea pandalid shrimp genus Heterocarpus A. Milne-Edwards, 1881 is often considered as having fishery potential (Holthuis 1980; Chan 1998). Thirty species are known in the genus (Yang et al 2018) and they have rather high morphological. Guo-Chen Jiang & Tin-Yam Chan / ZooKeys 1042: 23–34 (2021). Larval development has only been reported in four species of Heterocarpus; namely H. abulbus Yang, Chan & Chu, 2010 (Jiang et al 2014 [Zoea I]; 2016 [ZI–ZIX]), H. ensifer A. Milne-Edwards, 1881 (Landeira et al 2010 [ZI–ZIV]), H. hayashii Crosnier, 1988 (Jiang et al 2014 [ZI]), and H. sibogae de Man, 1917 (Iwata et al 1986 [ZI–ZV]; Jiang et al 2014 [ZI])

Methods

Results

Conclusion