Bradyidius abyssalis, Markhaseva & Renz, 2021
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publication ID |
https://doi.org/ 10.11646/zootaxa.5004.2.5 |
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publication LSID |
lsid:zoobank.org:pub:419EF04D-DC25-4A75-AC8A-6C5BAFFC07F1 |
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persistent identifier |
https://treatment.plazi.org/id/03E73B78-FFF3-FFDB-FF0C-61F97FC7C225 |
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treatment provided by |
Plazi |
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scientific name |
Bradyidius abyssalis |
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sp. nov. |
Bradyidius abyssalis sp. nov.
( Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )
Holotype. Adult female, dissected, body length 2.80 mm. SMF 37266/1-4 (slides) and 37267 (vial) (Senckenberg). Collected above the sea bed at Sta. 636, Meteor Seamount, 29° 19.24’ N 28° 37.94’ W, on 18 August 2009 by the DIVA 3 expedition, Meteor cruise ME 79–1, at a depth of 4338 m. GoogleMaps
Paratype. One adult female, partly dissected, body length 2.45 mm. ZIN, 91149 the same label data as for holotype GoogleMaps .
Additional material. Four females from the Atlantic Ocean: 1 female, body length 2.90 mm, collected in the Guinea Basin , Sta. 64 (specimen 1), 15 March 2005, 00°13.27’ S 002°29.91’ W, by the DIVA 2 expedition, Meteor cruise ME 63–2, at a depth of 5055 m GoogleMaps ; 2 females, both body length 2.90 mm, collected in the Brazil Basin , Sta. 554 (specimen 2), 22 July 2009, 26°34.70’ S 35°12.79’ W, by the DIVA 3 expedition, Meteor cruise ME 79–1, at a depth of 4485 m GoogleMaps ; 1 female, body damaged, not measured, collected in the Brazil Basin , Sta. 561 (specimen 3), 23 July 2009, 26°34.78’ S 35°13.90’ W, by the DIVA –3 expedition, Meteor cruise ME 79–1, at a depth of 4484 m GoogleMaps ;
Description. Female. Body length 2.45–2.90 mm. Prosome 3.20–3.35 times as long as urosome ( Fig. 1A–B View FIGURE 1 ). Rostrum ( Fig. 1D–E View FIGURE 1 ) two-pointed, divergent. Cephalosome and pedigerous somite 1 partly fused and pedigerous somites 4–5 separate; posterior corners of prosome prolonged into short points, covering the proximal third of genital double-somite ( Fig. 1A–B, F–G View FIGURE 1 ). Urosome of 4 somites. Genital double-somite symmetrical, anterior third in dorsal view with lateral swellings and in lateral view with dorsal swelling ( Fig. 1F–G View FIGURE 1 ). Spermathecae narrowelongate and oval-widened in the distal part ( Fig. 1F View FIGURE 1 ). Caudal rami with 1 lateral seta, 1 ventral seta, and 4 terminal setae ( Fig. 1F–G View FIGURE 1 ).
Antennule ( Fig. 2A–D View FIGURE 2 ) reaching pedigerous somite 4, of 24 articulating segments; armature as follows: I–2s (holotype, paratype and additional specimens 2 and 3), or 3s in additional specimen 1, II–IV–6s+1ae, V –2s+1ae, VI –2s, VII –2s+1ae, VIII and IX–2s each, X–XI–4s+1ae, XII and XIII–2s each, XIV –1s+1? in holotype and 2s+1ae in paratype, XV–2s, XVI –2s+1ae, XVII to XX–2s each, XXI –2s in holotype and 2s+1ae in paratype, XXII and XXIII–1s each, XXIV –2s+1ae, XXV –XXVI–2s each, XXVII –XXVIII–4s+1ae in holotype and 5s+1ae in paratype.
Antenna ( Fig. 2E–F View FIGURE 2 ), coxa with 1 seta, basis with 2 setae; exopod of 8 segments, setation formula 1,1-1-1, 1, 1, 1, 1, 1, and 3 setae, endopod segment 1 with 2 setae, endopod segment 2 with 8 + 7 setae.
Mandible ( Fig. 2G–I View FIGURE 2 ), gnathobase with 7 teeth; basis with 3 setae, middle seta small; exopod 5-segmented with 1, 1, 1, 1, and 2 setae; endopod segment 1 with 3 setae, segment 2 with 9+2 setae.
Maxillule ( Fig. 3A–B View FIGURE 3 ), praecoxal arthrite with 9 terminal spiniform setae, 4 posterior and 1 anterior setae, coxal endite with 5 setae; coxal epipodite with 7 long+2 short setae; proximal basal endite with 4 setae, tubercle with pore and small denticles along the distal border present, distal basal endite with 5 setae; endopod with 15 setae (16 setae in paratype); exopod with 10 setae.
Maxilla ( Fig. 3C–E View FIGURE 3 ), praecoxal to basal endites with 3 setae each, all endites decorated with spinules; enditiclike lobe of proximal endopod segment with 3 setal elements, two of them thicker, spine-like; endopod with 9 (2+2+2+3) setae.
Maxilliped ( Fig. 4A–D View FIGURE 4 ), syncoxa with 1 seta on proximal praecoxal endite, 2 setae on middle praecoxal endite and 3 setae on distal praecoxal endite; coxal lobe with 3 setae and tubercle with a deep notch (arrowed at Fig. 4A View FIGURE 4 ). Basis with 3 setae. Endopod 6-segmented with 2, 4, 4, 3, 3+1, and 4 setae, first segment very small and fused to basis.
Legs. P1 ( Fig. 1H View FIGURE 1 ), coxa with lateral spinules; basis with medial distal seta curved with setules; endopod 1-segmented with lateral lobe, its lateral margin with spinules and anterior surface with distal spinules; exopod segment 1 with lateral setiform spine and segments 2 and 3 with 1 lateral spine each; lateral setiform spine of exopod segment 1 exceeding the base of the lateral spine at the exopod segment 2 and nearly reaching the base of exopod segment 3 third medial seta.
P2–P4 ( Fig. 4E–G View FIGURE 4 ), coxa with 1 medial seta, P2–P3 coxa with lateral spinules, at P4 coxa lateral spinules absent; basis without seta; endopod 2-segmented in P2, 3-segmented in P3–P4; posterior surface spinules present on P2 endopod segment 2 and P3–P4 endopod segments 2 and 3.
P5 absent.
Male unknown.
Type locality. 29° 19.24’ N 28° 37.94’ W.
Etymology. The species name “ abyssalis ” refers to the depth of the species’ habitat within the Atlantic Ocean.
Remarks. Differences from known congers are given in the remarks of the next species.
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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