Discoconchoecia elegans Sars 1965
Discoconchoecia elegans (Sars, 1965) Conchoecia elegans Sars, 1865; Paraconnchoenia elegans Poulsen, 1973 Material examined. Lectotype— female, station N- 2. Allolectotype— (station N- 2). P aralectotype —nine female, stations N- 1, N- 2, N- 3, N- 9, ICE 1, eight males, stations N- 1, N- 9, (Table 2...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://zenodo.org/record/6103180 https://doi.org/10.5281/zenodo.6103180 |
| Summary: | Discoconchoecia elegans (Sars, 1965) Conchoecia elegans Sars, 1865; Paraconnchoenia elegans Poulsen, 1973 Material examined. Lectotype— female, station N- 2. Allolectotype— (station N- 2). P aralectotype —nine female, stations N- 1, N- 2, N- 3, N- 9, ICE 1, eight males, stations N- 1, N- 9, (Table 2). Description Female (collected in vicinity of Svalbard). Carapace (Figs 2 A–B; 4 A; Table 3). The carapace is 1.9–2.3 mm long, with a height of 0.82–0.98 mm (37.3 % ± 2.3 %) (N. B. all values have been standardized by expressing them as percentages of the carapace length (CL) of the individual) and breadth of 0.7 mm (31.5 % ± 3.0%). There is a sculpture consisting of a few striae running parallel to ventral margin. The posterior dorsal corner of the right valve bears two spines (Fig. 2 C), whereas on the left valve there is one small spine at the PDC. The maximum carapace height is at about mid-length. The rostra are similar in length (11.7 % ± 0.4 % CL), and similar in length to the incisures, which show some disparity in length - the left incisure is 11.3 % ± 1.5 % CL and the right incisure is 10.0% ± 0.5 % CL. There is a shallow sulcus between the shoulder vaults. The left asymmetrical gland opens anterior to the posterior end of the hinge between the two carapace valves. The gland on the right valve is on the curve of posterior ventral corner. Frontal organ (Fig. 2 D; Table 3). The FO is straight, (37 % CL) and extended just beyond the end of the limb of the first antenna. There is no clear division between stem and capitulum and the whole organ is bare without spines or setae and its tip is rounded. Its total length is 23.8 % ± 2.2 % CL. First antenna (Fig. 2 D; Table 3). The limb consists of five segments and its overall length is 17.8 ± 2.0% CL. Its segments are differentiated; the first being 35 % of the total antennal length, and the second segment 50 %. Both segments are bare. The fourth segment carries two sensory setae (a- and b-setae), and the fifth segment carries three, two of which are sensory (c- ... |
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