Hansenocaris cristalabri Olesen & Grygier, 2022
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.10954156 |
persistent identifier |
https://treatment.plazi.org/id/6515E623-0A20-1E1D-3AFA-64DCFD969307 |
treatment provided by |
Plazi |
scientific name |
Hansenocaris cristalabri Olesen & Grygier, 2022 |
status |
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Hansenocaris cristalabri Olesen & Grygier, 2022
Figs 2 View Fig , 5C View Fig , 9A–B View Fig
Hansenocaris cristalabri Olesen & Grygier, 2022: 304 View Cited Treatment , figs 1–5, tables 1–2.
Hansenocaris cristalabri – Dreyer et al. 2023b: fig. 1d.
One of “three known larval types of ‘y-larvae’” – Olesen 2024: fig. in upper right corner on p. 17.
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 spoon-shaped in dorso-ventral view; about twice as long as wide (without dorso-caudal spine); cephalic shield broadly rounded, with sharp discontinuity in body outline leading into trunk. In lateral view, body only slightly bent, trunk axis downturned 15–20° relative to cephalic axis. Length ca 330 µm (ventral view in life, without dorso-caudal spine), greatest width 180 µm, greatest dorso-ventral thickness ca 100 µm. Labrum with goblet-shaped outline in ventral view and posterior margin free; labral surface divided into facets by cuticular ridges; midline of labrum extending ventrally as huge, cockscomb-like, spine-bearing crest. Cephalic shield with spines bordering pair of pits at postero-lateral corners. Trunk dorsum with two longitudinal rows of spines. Caudal end attenuate, terminating in 120 µm long, robust, and conical dorso-caudal spine armed with smaller spines and accompanied ventrally at base by pair of curved, 15 µm long furcal spines; dorso-caudal spine upturned 20° relative to trunk axis.
CYPRID VIEWED THROUGH CUTICLE OF LSN. Body weakly brownish with darker brown pigmentation in parts of thorax and telson. Telson less than half as long as thorax.
Identification and variation
Easily recognizable by its huge and unique labral crest-like process, the spines near the postero-lateral corners of the cephalic shield, the two longitudinal rows of spines dorsally on the trunk and the very long, robust and distinctly spinose dorso-caudal spine.
Distribution
Japan (Sesoko Island, Okinawa).
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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Facetotecta |
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Hansenocaris cristalabri Olesen & Grygier, 2022
Olesen, Jørgen & Grygier, Mark J. 2024 |