Echinoderes juliae Sørensen et al., 2018

Grzelak, Katarzyna & Sørensen, Martin V., 2022, Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand, European Journal of Taxonomy 844, pp. 1-108 : 96-98

publication ID

https://doi.org/ 10.5852/ejt.2022.844.1949

publication LSID

lsid:zoobank.org:pub:193EDD91-B24D-455C-B8AA-8133586A00A1

DOI

https://doi.org/10.5281/zenodo.7222157

persistent identifier

https://treatment.plazi.org/id/03B48788-5B73-2A72-FD9F-3B006468FE08

treatment provided by

Felipe

scientific name

Echinoderes juliae Sørensen et al., 2018
status

 

Echinoderes juliae Sørensen et al., 2018 View in CoL

Figs 38–39 View Fig View Fig ; Table 28

Material examined

NEW ZEALAND • 1 ♀, 1 ♂; Hikurangi Slope , stn TAN1004/4; 41.6837° S, 175.6642° E; 1046 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; 1 ♀ NHMD-921717 , GoogleMaps 1 ♂ NHMD-921715 . Mounted for LM in Fluoromount G on glass slides GoogleMaps 1 ♀, 1 ♂; Hikurangi Slope , stn TAN1004/17; 41.6288° S, 175.8682° E; 1514 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; 1 ♀ NHMD-921723 , GoogleMaps 1 ♂ NHMD-921724 . Mounted for LM in Fluoromount G on glass slides GoogleMaps 1 ♂; Hikurangi Slope , stn TAN1004/38; 41.5937° S, 175.8532° E; 1121 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; NHMD-921729 . Mounted for LM in Fluoromount G on HS slide GoogleMaps 1 ♀; Hikurangi Slope , stn TAN1004/44; 41.5258°S, 175.8003°E; 728m b.s.l.; Apr.2010; NIWA TAN1004Voyage; soft sediment; personal reference collection of MVS. Mounted for SEM GoogleMaps 1 ♀; Hikurangi Slope , stn TAN1004/76; 41.6833° S, 175.6500° E; 1282 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; personal reference collection of MVS. Mounted for SEM GoogleMaps 2 ♀♀, 2 ♂♂; Pahaua Canyon , stn TAN1004/12; 41.5508° S, 175.7250° E; 1350 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; 2 ♀♀ NHMD-921718-921729 , GoogleMaps 2 ♂♂ NHMD-921720-921721 . Mounted for LM in Fluoromount G on glass slide GoogleMaps 1 ♀; Pahaua Canyon , stn TAN1004/22; 41.5100° S, 175.7187° E; 1188 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; NHMD-921728 . Mounted for LM in Fluoromount G on HS slide GoogleMaps 1 ♂; Pahaua Canyon , stn TAN1004/27; 41.4983° S, 175.7043° E; 1013 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; personal reference collection of MVS. Mounted for SEM GoogleMaps 1 ♂; Pahaua Canyon , stn TAN1004/31; 41.4962° S, 175.6828° E; 730 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; NHMD-921725 . Mounted for LM in Fluoromount G on glass slide GoogleMaps 2 ♀♀; Honeycomb Canyon , stn TAN1004/58; 41.4080° S, 175.8977° E; 670 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; NHMD-921726 to 921727. Mounted for LM in Fluoromount G on glass slides GoogleMaps 2 ♀♀; same collection data as for preceding; personal reference collection of MVS. Mounted for SEM GoogleMaps 1 ♀; Honeycomb Canyon , stn TAN1004/62; 41.4760° S, 175.9477° E; 1171 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; personal reference collection of MVS. Mounted for SEM GoogleMaps 2 ♀♀; Seamount 766, stn TAN1004/132; 42.1345° S, 174.5850° E; 1453 m b.s.l.; Apr. 2010; NIWA TAN1004 Voyage; soft sediment; NHMD-921730 , NHMD-921732. Mounted for LM in Fluoromount G on HS slides GoogleMaps .

Distribution

Hikurangi slope, seamount, Honeycomb Canyon, Pahaua Canyon, 670–1514 m b.s.l. See Fig. 1 View Fig for a geographic overview of stations and Table 1 View Table 1 for station and specimen information.

Brief description and remarks

Echinoderes with middorsal spines on segments 4 to 8 and spines in lateroventral positions on segments 6 to 9. Tubes present in lateroventral position on segment 5 only. Glandular cell outlets type 2 present in subdorsal, laterodorsal, sublateral and ventrolateral positions on segment 2, in sublateral positions on segments 3 and 8, and in midlateral positions on segments 4 and 5 ( Figs 38–39 View Fig View Fig ). Tergal extensions long, with flexible tips ( Figs 38D View Fig , 39G View Fig ).

Echinoderes juliae is one of the deep-sea species originally found on the abyssal plain off Oregon and along the continental rise off California, in the Northeast Pacific at depths of 2702 to 3679 m ( Sørensen et al. 2018). Recently, its presence was also recorded on the abyssal plain, east of the Atacama Trench in the southeast Pacific at a depth of 2560 m ( Grzelak et al. 2021).

Despite a significant geographic distance, the Hikurangi Margin individuals examined for the present study follow the morphology and morphometrics of E. juliae from the northeast Pacific type locality closely. Differences were only detected for the glandular cell outlets type 2 on segment 4, which are displaced from sublateral to midlateral positions in the New Zealand specimens ( Figs 38B View Fig , 39C–D View Fig ), and the length of the lateral terminal accessory spines, which are twice as long in individuals from the US west coast (see Table 28). Nevertheless, the distribution and arrangement of the other cuticular structures were in line with the original description, and thus we feel confident that the recorded specimens are E. juliae .

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