Keysercypria obtusa ( Klie, 1940 ), 2011
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publication ID |
https://doi.org/ 10.11646/zootaxa.2820.1.1 |
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DOI |
https://doi.org/10.5281/zenodo.5294266 |
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persistent identifier |
https://treatment.plazi.org/id/03EB87C8-6F4B-FFFB-FF30-F943A0A477B6 |
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treatment provided by |
Felipe |
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scientific name |
Keysercypria obtusa ( Klie, 1940 ) |
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Keysercypria obtusa ( Klie, 1940)
( Figure 17 View FIGURE 17 )
1940 Cypria obtusa Klie : p. 225, Figs 17–19 View FIGURE 17 View FIGURE 18 View FIGURE 19 .
Redescription. Male: Carapace ovoid in lateral view, with dorsal margin almost evenly rounded. LV overlapping RV on all free margins. RV without marginal tubercles along free margin ( Figure 17F–H View FIGURE 17 ).
Prehensile palps ( Figures 17B, C View FIGURE 17 ): Right palp ( Figure 17C View FIGURE 17 ) much more robust than left one ( Figure 17B View FIGURE 17 ), finger with a triangular extension on dorsal margin and one terminal seta broad and well sclerified. Left palp with finger which is not so curved and long and one terminal seta distinguishable on the slide.
T2 ( Figure 17E View FIGURE 17 ): Basal seta missing. Setae “e” and “f” reaching distal end of following segments. Seta “h3” on terminal segment reaching half L of terminal claw. Terminal claw poorly serrated and as long as three distal segments combined. T2 covered with long and dense pseudochaetae, all endopodal setae plumose.
T3 ( Figure 17D View FIGURE 17 ): Basal segment without d2 seta, while seta d1 short. Setae “e”, “f” and “g” all being very short. Terminal segment almost as wide as long, L ratios between three distal setae (of which h1 and h2 being almost claw-like) 1: 2.2: 5.1.
Hemipenis ( Figure 17A View FIGURE 17 ): Lobe “a” distally rounded, lobe “b” pointed, and much lower than lobe “a”. Internal structure impossible to be observed in the original dissection.
Zenker organ: Consisting of seven whorls of spines.
Remarks and affinities. Keysercypria obtusa ( Klie, 1940) is closely related to K. pellucida ( Sars, 1901) and K. circinata ( Würdig & Pinto, 1993) , and in all three species the RV lacks marginal tubercles. In fact, the lack of the marginal tubercles prompted Klie (1940) to place Keysercypria obtusa into the genus Cypria Zenker, 1854 . However, this North Brazilian species is more closely related to other species of the genus Keysercypria gen. nov. than to Cypria because it has a typical morphology of the hemipenis and chaetotaxy of T2 and T3. Beside the lack of the tubercles on the RV, K. obtusa differs from other species of the genus where tubercles are present, by the appearance of the prehensile palps and/or length of “h3” seta on the T2.
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.