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Calanoida ( Order ) |
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Clausocalanoidea ( Superfamily ) |
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Diaixidae ( Family ) |
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Sensiava ( Genus ) |
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Sensiava longiseta Markheseva & Schulz, 2006 (M, ?F) | |
| | | | | | | Ref.: | | | Markhaseva & Schulz, 2006 (p.1, Descr.M, figs.M, Rem.: Phylogeny); Markhaseva & Renz, 2011 (p.67, Fig.M); Andronov, 2014 (p.33, fig.M) |  issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.4, Fig.1]. Male (from 63°44'S, 33°48'W): A-B, habitus (dorsal and lateral, respectively); C, forehead (right lateral); D, right caudal ramus (dorsal); E, idem (lateral view). Scale bars: 0.1 mm. Nota : Prosome 2.5-2.9 times longer than urosome. Rostrum with 2 long filaments. Cephalosome and 1st pedigerous somite incompletely separated, 4th and 5th incompletely fused (suture clearly visible laterally). Caudal rami with 4 terminal setae, 1 ventral seta and 1 small dorsal seta.
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.5, Fig.2]. Male: A, right A1, segments1-14 (ancestral segments I-XVII); B, idem, segments 15-23 (ancestral segments XVIII-XXVIII); C, idem, segments 15-20 (ancestral segments XVIII-XXIV). Scale bars: 0.1 mm. Nota: Right A1 geniculate, 23-segmented. Segment 2 is a complex of ancestral segments II-IV.
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.6, Fig.3]. Male: A, left A1, segments 1-7 (ancestral segments I-IX); B, idem, segments 8-17 (ancestral segments X-XX); C, idem, segments, 18-24 ( ancestral segments XXI-XXVIII); D, P1; E, basis of P1; F, endopod endopod of P1 (other position); G, P5; H, right P5 exopod; I-K, left P5 exopod (different positions); L, left P5 exopodite segment 2. Scale bars: 0.1 mm. Nota: Left A1 24-segmented, differs in setation from right one.
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.8, Fig.4]. Male: A, exopod of A2; B, A2 (coxa, basis and endopod); C, Md (mandibular palp); D-E, Md (gnathobase; different positions); F, Mx1 (posterior view); G, praecoxal endite of Mx1 (anterior view). Scale bars: 0.1 mm. Nota : Left A1 24-segmented, exceeding caudal rami by distal segment. A2 : coxa with 1 seta ; basis with 2 setae ; exopod 8-segmented with 0,1, 1, 1, 1, 1, 1, and 3 setae ( the 2nd proximal segment is a compound segment of 3 fused segments (coma represents an arthropodial membrane, dash represents absence of an arthropodial membrane, see Markhaseva & Ferrari, 2005), about 1.5 times as long as endopod ; 1st endopodal segment with 1 seta, 2nd with 6 and 6+2 setae. Md : gnathobase with 5 large and 3 small spine-like teeth plus dorsal seta. Mx1 : praecoxal endite with 9 terminal spines, 1 anterior and 4 dorsal setae ; coxal endite with 3 setae ; proximal basal and distal basal endites with 4 setae each ; endopod with 9 setae ; exopod with 8 setae ; coxal epipodite with 9 setae. P1 : basis with medial distal seta strongly curved ; endopod 1-segmented with lateral lobe ornamented with denticles and 4 pores. P5 asymmetrical, right leg uniramous, left leg biramous ; coxae fused, of similar size ; right leg exopod 3-segmented ; left endopod 1-segmented
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.9, Fig.5]. Male: A, Mx2 (sensory setae partly figured); B-C, sensory setae of Mx2 endopod. Scale bars: 0.1 mm. Nota : Mx2 : proximal praecoxal endite with 5 setae ; distal praecoxal endite with 3 setae ; proximal coxal endite with 3 setae (1 worm-like sensory seta and 1 seta more sclerotized) ; distal coxal endite with 3 setae, 2 setae more sclerotized ; proximal basal endite with 4 setae (2 more sclerotized, 2 worm-like, sensory) ; distal basal endite plus endopod with 8 sensory setae (3 longer, worm-like, 5 shorter, brush-like).
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.10, Fig.6]. Male: A, Mxp (setae partly figured); B, syncoxa of Mxp; C, basis and endopod of Mxp. Scale bars: 0.1 mm. Nota : Mxp : syncoxa with 1 sclerotized seta on proximal praecoxal lobe, 2 setae on middle lobe and 3 setae (2 sclerotized, 1 poorly sclerotized) on distal praecoxal lobe ; coxal lobe with 3 setae ; basis with 3 medial and 2 distal setae ; endopod 5-segmented with 4, 4, 3, 3+1 and 4 setae, 2 setae on segment 5 thicker and very long.
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 issued from : E.L. Markhaseva & K. Schulz in Zootaxa, 2006, 1368. [p.11, Fig.7]. Male: A, P2; B, P3; C, P4. All posterior views. Scale bars: 0.1 mm.
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 issued from : E.L. Markhaseva & J. Renz in Zootaxa, 2011, 2889. [p.67, F]. Changed and schematized after Markhaseva & Schulz (2006). Male: F, P5 (Nota: right basis in grey).
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 Issued from : E.L. Markhaseva in Zootaxa, 2014, 3802 (2). [p.235, Fig.13]. As Sensiava cf. longiseta. Female (from 14°59'S, 29°56'W): A, spermatheca (lateral view); B, A2, coxa, basis, senopodal segment 1; C, Md, cutting edge; D, Mx1 (arrow marks distalmost terminal seta curved at the apex); E, Mx2; F, Mxp syncoxa; G, Mxp, basis, distal setae not figured ; I, P1. Scale bars: 0.1 mm.
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 Issued from : V.N. Andronov in Russian Acad. Sci. P.P. Shirshov Inst. Oceanol. Atlantic Branch, Kaliningrad, 2014. [p.33, 8a, 8b]. Sensiava longiseta after Markhaseva & Schulz, 2006 : segments XVIII- XXIV of left and right A1 male, respectively.
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Distribution map of Sensiava longiseta by geographical zones
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| | | | | | | Loc: | | | Antarct. (Weddell Sea) | | | | N: | 2 | | | | Lg.: | | | (959) M: 4,6-4,8; (1171) F: 4,8; {F: 4,80; M: 4,60-4,80} | | | | Rem.: | epibenthic (4745-4975 m)
Provisionally placed within Diaixidae.
For Markhaseva & Schulz (2006, p.9) the male has sensory setae on Mx2 endopod, as do species in the clausocalanoidean Bradfordian families Diaixidae, Parkiidae, Phaennidae, Scolecitrichidae and Tharybidae. It also shares with Bradfordian families the following plesiomorphies : setation patterns (1, 2, 3 setae) of Mxp praecoxal endite and the praecoxal endite of Mx2 (5 setae). However, S. longiseta is unique among the clausocalanoidean families in possessing another plesiomorphic calanoid character : the well developed geniculate right A1. | | | Last update : 18/04/2016 | |
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 Any use of this site for a publication will be mentioned with the following reference :
Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed April 27, 2024] © copyright 2005-2024 Sorbonne University, CNRS
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