Leucon (Crymoleucon) longirhinus Mühlenhardt-Siegel 2011, sp. n.
Leucon ( C. ) longirhinus sp. n. (Figures 23–25) Material. Holotype non-ovigerous female, ZMH: K 42945; 10 March 2002. Type locality. Antarctica, western Weddell Sea, 65° 00.85’ S 43° 03.03’ W, 4678 m depth, ANT XIX, #135, epibenthic sledge. Paratypes: Peninsula: ANT XIX #105: 2 non-ovigerous female...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2011
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| Online Access: | https://doi.org/10.5281/zenodo.5245259 http://treatment.plazi.org/id/03EE87EEFFD7FF93FF1FFA97FB4C9BC9 |
| Summary: | Leucon ( C. ) longirhinus sp. n. (Figures 23–25) Material. Holotype non-ovigerous female, ZMH: K 42945; 10 March 2002. Type locality. Antarctica, western Weddell Sea, 65° 00.85’ S 43° 03.03’ W, 4678 m depth, ANT XIX, #135, epibenthic sledge. Paratypes: Peninsula: ANT XIX #105: 2 non-ovigerous females (1 damaged, 1 dissected), ANT XIX #129: 1 non-ovigerous female; E Weddell Sea: ANT XV #130: 1 juvenile male, 2 subadult females, 4 females with empty oostegites, 2 mancas; ANDEEP III #78: 1 male, 3 mancas. ZMH: K 42946. Etymology. The new species is named “ longirhinus ” because of the long pseudorostrum. Diagnosis. Pseudorostrum more than half as long as remainder of carapace, with two teeth ventrally; two teeth laterally at posterior part of carapace; accessory flagellum longer than basal article of main flagellum; three to four teeth above the antennal notch; uropod endopod longer than exopod; the proportion endopod to peduncle is 0.8 to 0.9. Description. Holotype, 4.8 mm long (Fig. 23). Carapace longer than free thoracic segments; dorsomedian line serrate with about 10 teeth up to 2/3 of the carapace; pseudorostral lobes long, 0.6 times as long as carapace measured from ocular lobe to the posterior margin, with two teeth ventrally at pseudorostrum; siphonal tube longer than pseudorostrum; ocular lobe reduced; eyes missing. Antennal notch indistinct, shallow; anterolateral tooth not pronounced, three to four teeth above antennal notch at anterolateral margin of carapace; anteroventral margin of carapace not strongly serrate. Integument smooth and shiny, white coloured, weakly calcified. Five free thoracic segments visible. Pleon slightly longer than carapace and free thoracic segments combined. Pleotelson as long as wide, anal valves visible from above, slightly produced between uropod peduncles, 0.7 times as long as uropod peduncle. Appendages: female (paratype). Antenna 1 (Fig. 24, A 1): relative length of peduncle articles 1 to 3: 45/36/20; slightly geniculate between article 2 and 3; accessory flagellum ... |
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