Sensiava secunda, Markhaseva, Elena L., 2014
publication ID |
https://doi.org/10.11646/zootaxa.3802.2.5 |
publication LSID |
lsid:zoobank.org:pub:EC2A5610-9C2C-4F9A-A998-DFD389542652 |
DOI |
https://doi.org/10.5281/zenodo.6140726 |
persistent identifier |
https://treatment.plazi.org/id/03A88795-476F-FFAA-CA9C-F8C3FE89F949 |
treatment provided by |
Plazi |
scientific name |
Sensiava secunda |
status |
sp. nov. |
Sensiava secunda sp. nov.
( Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )
Holotype. Adult female, dissected, body length 3.30 mm. ZMH Reg. no. K–42161. Collected on 20 March 2005 by the DIVA –II expedition above the sea bed at abyssal depths ( 5142 m).
Paratype, Body length 3.00 mm. ZMH Reg. no. K–42162, 1 adult female, dissected, the same label data as for the holotype.
Description. Female. Body length 3.30–3.00 mm. Prosome 3.9–3.8 times as long as urosome ( Fig. 1 View FIGURE 1 A–B). Rostrum as 2 filaments ( Fig. 1 View FIGURE 1 C). Cephalosome and pedigerous somite 1 incompletely separate, and pedigerous somites 4 and 5 completely separate; posterior corners in dorsal view triangular; as short rounded lobes in lateral view ( Fig. 1 View FIGURE 1 A–B). Urosome of 4 somites ( Fig. 1 View FIGURE 1 D, F). Spermathecae of moderate size, slightly upturned anteriorly ( Fig. 1 View FIGURE 1 E–G). Caudal rami with 1 dorsal seta, 1 ventral seta, and 4 terminal setae.
Antennule ( Fig. 2 View FIGURE 2 A–B) nearly as long as body, or extending to caudal rami, of 24 articulating segments; armature as follows: I–3 s, II– IV–6 s + 1ae, V–2 s + 1ae, VI–2 s, VII–2 s + 1ae, VIII–2 s, IX–2 s + 1ae, X– XI–4 s + 1ae, XII–1 s, XIII–1? (scar, setal element was broken) XIV–2s + 1ae, XV–1s, XVI–2s + 1ae, XVII–1?, XVIII–1s + 1?, XIX–1s, XX–2s, XXI–1s + 1ae, XXII–1s, XXIII–1s, XXIV–2s, XXV–2s, XXVI–2s, XXVII–XXVIII–5s + 1ae.
Antenna ( Fig. 2 View FIGURE 2 C), coxa with 1 seta, basis with 2 setae, one seta very short; exopod of 7 segments with 0, 0-0- 1, 1, 1, 1, 1, 1, and 3 setae; first endopodal segment with 1 seta, second with 8 + 6 setae.
Mandible ( Fig. 2 View FIGURE 2 D–E), gnathobase without crest, cutting edge with 4 large and 4 small teeth near dorsal seta; basis with 3 setae; exopod 5-segmented with 1, 1, 1, 1, and 2 setae; endopod segment 1 with 2 setae, segment 2 with 9 setae.
Maxillule ( Fig. 3 View FIGURE 3 A–B), praecoxal arthrite with 9 marginal, 4 posterior and 1 anterior setae, distalmost praecoxal arthrite terminal seta curved at apex; coxal endite with 4 setae; coxal epipodite with 7 long and 2 short setae; proximal basal endite with 4 setae, distal basal endite with 4 setae; endopod with 9 (3+6) setae; exopod with 8 setae.
Maxilla ( Fig. 3 View FIGURE 3 C–D), praecoxal endite (previously considered as proximal praecoxal endite) with 5 setae; coxal endite (previously considered as distal praecoxal endite) with 3 setae; basal endites (previously considered as coxal endites) with 3 setae each, 1 seta of proximal basal endite sensory, worm-like; enditic-like lobe of proximal endopodal segment (previously considered as proximal basal endite) with 4 setae, 2 sensory, worm-like; setae of the maxilla basal endites and enditic-like lobe of endopod are similar in shape and size, curved and curled distally; endopod with 3 worm-like and 5 brush-like sensory setae and 1 small sclerotized seta.
Maxilliped ( Fig. 3 View FIGURE 3 E, 4A), syncoxa with 1 sclerotized seta on proximal praecoxal endite, 2 sclerotized setae on middle praecoxal endite and 3 sclerotized setae, distalmost with poorly developed brush on distal praecoxal endite; coxal lobe with 3 setae. Basis with 3 proximal setae and 2 distal setae. Endopod 5-segmented with 4, 4, 3, 3+1, and 4 setae.
Swimming legs. P1 ( Fig. 2 View FIGURE 2 F), coxa with medial spinules; basis with medial spinules and small posterior denticles at base of medial distal seta curved with setules; endopod 1-segmented with lateral lobe, lateral margin without spinules; exopod segments 1 to 3 with 1 lateral spine each, spines of exopod segments 1 and 2 thin distally. P2–P4 ( Fig. 4 View FIGURE 4 B–D), coxa with 1 seta; basis without seta, with small denticles distomedially; endopod 2-segmented in P2, with posterior spinules, 3-segmented in P3–P4 with posterior spinules; exopods 3-segmented. Posterior surface of P4 coxo-, basi, and exopod spinulated.
P5 ( Fig. 1 View FIGURE 1 H) 3-segmented, composed of coxa, basis and 1-segmented exopod; coxa slightly more elongate than basis; coxa with sparse small spinules distolaterally, basis with distolateral patch of spinules, exopod ornamented with dense surface spinules, 4 distal spines partly or completely separate from segment, medial spine longest.
Type locality. South Atlantic ( 00º45’S 05º35’W).
Etymology. The species name refers to the chronological sequence in which this species was discovered for the genus.
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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