Sarsarietellus suluensis, Ohtsuka & Nishida & Machida, 2005
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publication ID |
https://doi.org/ 10.1080/00222930500087408 |
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persistent identifier |
https://treatment.plazi.org/id/03E0481B-FFCB-FF82-D7EA-5200FB2F2BD2 |
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treatment provided by |
Felipe |
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scientific name |
Sarsarietellus suluensis |
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Sarsarietellus suluensis n. sp. ( Figures 11–13 View Figure 11 View Figure 12 View Figure 13 ) Material examined
Adult female (holotype), collected from the central Sulu Sea (08 ° 57.319N, 120 ° 11.319E, 09 ° 03.829N, 120 ° 12.359E; wire out 3600 m; depth 0, 1516 m) with IKMT; 6–7 December 2002 GoogleMaps ; appendages mounted on glass slides, and body proper in vial; NHM 2005.161 View Materials .
Description
Female (holotype). Body ( Figure 11A, B View Figure 11 ) 3.08 mm, robust; prosome ca 3.1 times as long as urosome. Cephalosome with round papilla anterolaterally at each side ( Figure 11A, C View Figure 11 ); rostrum ( Figure 11D View Figure 11 ) possibly with pair of filaments (missing). Prosomal end asymmetrical, with right side more produced outward ( Figure 11B View Figure 11 ); dorsolateral and ventrolateral processes acutely pointed; ventrolateral process reaching beyond posterior margin of genital double-somite. Urosome four-segmented; genital double-somite ( Figure 11E–G View Figure 11 ) slightly asymmetrical from dorsal view ( Figure 11B View Figure 11 ), but highly from ventral view ( Figure 11E View Figure 11 ); genital system remarkably asymmetrical, with right gonopore larger and more anteriorly located than left one; copulatory pore opening beneath irregular ventral protrusion on right side; copulatory duct heavily chitinized, Y-shaped; seminal receptacle tubular, terminating at round tip, about half as long as genital double-somite; anal somite short; caudal rami ( Figure 11B View Figure 11 ) symmetrical, ornamented with fine setules along inner margin: seta I rudimentary; seta IV thickest (terminal part missing).
Antennules ( Figure 11H, I View Figure 11 ) symmetrical, 23-segmented, reaching posterior margin of pediger 3; fusion pattern and armature as follows: I– III 57+2 ae, IV 52, V 52+ae, VI 52+ae, VII52+ae, VIII 52+ae, IX52+ae, X52+ae, XI52+ae, XII52+ae, XIII52+ae, XIV52+ae, XV52+ae, XVI52+ae, XVII52+ae, XVIII52+ae, XIX52+ae, XX52+ae, XXI 5 2+ae, XXII51, XXIII 51, XXIV –XXV52+2+ae ( Figure 11I View Figure 11 ), XXVI– XXVIII 58+ae ( Figure 11I View Figure 11 ). First (I– III) to eight (X) segments fringed with long setules along posterior margin. Antenna ( Figure 11J View Figure 11 ) with unarmed coxa; basis with serrate seta at inner corner; endopod two-segmented, first segment with minute seta distally, second segment with three inner setae of unequal length and one reduced and five ordinary terminal setae; exopod indistinctly eight-segmented, setal formula 0, 1, 1, 1, 1, 1, 0, 3 (one vestigial).
Mandible ( Figures 11K View Figure 11 , 12A View Figure 12 ) with two mono- and one bicuspid teeth and two patches of setules along cutting edge; patch of long setules present near base of palp (not shown in Figure 11K View Figure 11 ); endopod unisegmented, with one well-developed and one rudimentary seta; exopod five-segmented, setal formula 1, 1, 1, 1, 2. Maxillule ( Figure 12C View Figure 12 ) with praecoxal arthrite bearing five naked spines, one process and patch of long setules; coxal endite bearing serrate seta; coxal epipodite with eight setae; basis with two rows of long setules and one vestigial seta; endopod one-segmented, bulbous, with two serrate unequal setae terminally; exopod one-segmented, lobate, with three long setae (one missing in Figure 12C View Figure 12 ) terminally. Maxilla ( Figure 12D, E View Figure 12 ) with first praecoxal endite bearing two setae and one vestigial element; second praecoxal to second coxal endites each with two serrate setae; basis elongated, bearing relatively short spine with two longitudinal rows of fine setules ( Figure 12E View Figure 12 ); endopod indistinctly four-segmented, with setal formula 1, 3, 2, 2. Maxilliped ( Figure 12F–H View Figure 12 ) with syncoxa bearing one middle and two subterminal serrate setae and subterminal patch of minute spinules; basis protruded midway, with two serrate setae and patch of fine spinules; first endopodal segment nearly incorporated into basis, with serrate seta; second to fifth endopodal segments bearing four, four, three, and three setae, respectively ( Figure 12F–H View Figure 12 ); second endopodal segment elongate; terminal endopodal segment with reduced seta a and long seta b.
Segmentation and seta/spine formula of legs 1–4 ( Figure 13A–F View Figure 13 ) as in Protoparamisophria biforaminis . Leg 1 ( Figure 13A, B View Figure 13 ) with basis bearing anterodistal row of minute spinules near base of endopod; first and third endopodal segments with patch of fine setules on anterior surface; outer spines on second and third exopodal segments well chitinized. Legs 2 ( Figure 13C, D View Figure 13 ) and 3 ( Figure 13E View Figure 13 ) similar except for acuteness of process at inner distal corner of basis. Leg 4 ( Figure 13F View Figure 13 ) with short basal seta on posterior surface; basal process moderately pointed at inner distal corner.
Leg 5 ( Figure 13G View Figure 13 ) almost symmetrical, with coxae and intercoxal sclerite completely fused to form common base; basis bearing plumose seta near outer middle margin on posterior surface; endopod represented by process carrying four plumose setae, acutely pointed at tip; exopod unisegmented, with one long, terminal and four short, outer spines; terminal right process of exopod slightly longer than left one.
Remarks
The new species is readily distinguished from the other congeners based on: (1) welldeveloped dorsolateral and ventrolateral processes of pediger 5; (2) remarkably asymmetrical genital system of the genital double-somite; (3) structure of leg 5 (in particular, the non-expression of suture lines on the exopod).
Phoront of possibly apostome ciliates were found also on the mandibular palp ( Figure 12A, B View Figure 12 ) of this species as well as in Metacalanalis hakuhoae (see Figure 3A, F, H, K View Figure 3 ).
Etymology
The specific name of the new species, suluensis , refers to the type locality, the Sulu Sea.
| V |
Royal British Columbia Museum - Herbarium |
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Mykotektet, National Veterinary Institute |
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.