Bythopussella
publication ID |
https://doi.org/ 10.5281/zenodo.183820 |
DOI |
https://doi.org/10.5281/zenodo.6233680 |
persistent identifier |
https://treatment.plazi.org/id/03B587E9-6C0C-FFC3-EB9A-FDE09122F86B |
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Plazi |
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Bythopussella |
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Bythopussella View in CoL sp. aff. B. brandtae
( Figs. 43 View FIGURE 43 , 45.D–O, 47.F, G)
1969? Anchistrocheles ? sp. aff. A. aculeata, Maddocks : 113, Fig. 60m.
Material. 1 A F (SNB 0295), ANDEEP I, # 129–2–S, ZMH K 41324.
Distribution. Scotia Sea, Southern Ocean (Altantic Sector), 3631 to 3637m.
Measurements ( Fig. 43 View FIGURE 43 ). LV, L 1.11mm, H 0.67mm.
Description. Valves large, with bairdiid outline in lateral view; entire lateral surface of valves strongly punctate, several conspicuous sensilla present. Dorsal margin of both valves trisegmented, but LV more smoothly rounded, posterodorsal segment concave; anterodorsal segment of RV also concave; anterodorsal segment of LV slightly convex; anterior margin of both valves with 4 or 5 small spines; ventral margin of RV sinuous with conspicuous concavity in mouth region and upswung posterior; ventral margin of LV fairly straight, except posteriorly. Adductor muscle scars pattern with 3 anterior and 1 posteroventral scars.
Labrum and hypostome anteroventrally prolonged. AI robust with 7 podomeres, all sutures between podomeres conspicuous or fairly conspicuous. AII elongated, especially podomeres V. Md and MxI also very elongate. AII and ApV to VII terminal claws with tiny terminal hook. AII with elongate, slender podomeres; exopodite with 1 long and 1 mediumsized setae; podomere VI with 1 long claw, and 1 mediumsized and 2 small setae, all setae articulated. Md with 3 bifurcate teeth on masticatory base, exopodite with 3 long setae. Vibratory plate of MxI with 7 strahlen and more than 20 feathered setae; palp with 2 dorsal, 1 ventral, and 3 or 4 distal, mediumsized setae. ApV robust, vibratory plate with 5 strahlen and around 8 feathered setae. Podomere V of ApV to VII with 2 distal setae on podomere II; 1 long terminal claw, and 1 vestigial seta on podomere V. Exopodite of ApVI and VII without setae. Fu with 1 large and 1 mediumsized claw, and 2 mediumsized setae; 1 short seta between both Fu rods.
Remarks. No genital lobe was present in the single female of Bythopussella sp. aff. B. brandtae studied herein. The presence of 5 strahlen on the vibratory plate is not typical of this genus (usually there are 4).
Bythopussella sp. aff. B. brandtae differs from Bythopussella brandtae because the former species presents: (1) one long spine (broken during dissection) on the anterior of LV; (2) longer spine on the posterior margin of LV; (3) greater length in relation to height of carapace; (4) more conspicuous ornamentation, which is present on the entire lateral surface of valves; (5) exopodite of antenna II with 1 long and 1 mediumsized setae (instead of 1 long and 1short setae); (6) vibratory plate of ApV with 5 strahlen (instead of 4).
Bythopussella sp. aff. B. brandtae similar to Anchistrocheles ? sp. aff. A. aculeata illustrated by Maddocks (1969: 113, Fig. 60m) from the continental slope off Peru.
ZMH |
Zoologisches Museum Hamburg |
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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