Hansenocaris undetermined
publication ID |
https://doi.org/ 10.5852/ejt.2024.929.2479 |
publication LSID |
lsid:zoobank.org:pub:832192E7-A85A-4971-BA2F-D7420D299E8D |
DOI |
https://doi.org/10.5281/zenodo.10988726 |
persistent identifier |
https://treatment.plazi.org/id/6515E623-0A06-1E37-3994-63BCFBA99051 |
treatment provided by |
Plazi |
scientific name |
Hansenocaris undetermined |
status |
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Figs 2 View Fig , 19H View Fig
Material examined
JAPAN – Okinawa, Sesoko I. , laboratory pier, 26°38ʹ09.4ʺ N, 127°51ʹ55.2ʺ E • 1 LSN; 2018–2019 ( Tables 1 and S1 View Table 1 ). GoogleMaps
Description
LAST-STAGE NAUPLIUS (LSN). Lecithotrophic. Body lollipop-shaped in dorso-ventral view; about 1.6 times as long as wide; cephalic shield large and circular, with sharp discontinuity in body outline leading into trunk. In lateral view, longitudinal axes of cephalon, trunk and dorso-caudal spine in approximately same plane. Length 420 µm (without dorso-caudal spine), greatest width ca 260 µm, dorso-ventral thickness not measured but body apparently quite flattened. Labrum not examined in detail. Caudal end attenuate, terminating in ca 160 µm long, smooth dorso-caudal spine flanked ventrally at base by pair of small, thorn-like furcal spines ca 20 µm long.
CYPRID VIEWED THROUGH CUTICLE OF LSN. Body overall weakly brownish but with lateral margins of cephalon and terminal part of telson distinctly darker brown. Gut-like tube packed with yellow yolk granules, these being markedly concentrated in central part of cephalon. Telson about as long as wide and less than half as long as thorax.
Identification and variation
Easily recognizable by its general form, especially the large rounded cephalic shield and very long, smooth dorso-caudal spine, and by the cyprid’s distinct pattern of brown pigmentation. Only one specimen was available, so variation could not be checked.
Distribution
Japan (Sesoko Island, Okinawa); Taiwan (Green Island) (unpublished).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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