Paranotodelphys scutiformis Schellenberg, 1922
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publication ID |
https://doi.org/ 10.11646/megataxa.4.1.1 |
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DOI |
https://doi.org/10.5281/zenodo.5828384 |
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persistent identifier |
https://treatment.plazi.org/id/03C487CB-EF61-3A01-FCEF-FAFFFF1FFA8A |
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treatment provided by |
Plazi |
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scientific name |
Paranotodelphys scutiformis Schellenberg, 1922 |
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Paranotodelphys scutiformis Schellenberg, 1922 ( Figs. 31 View FIGURE 31 , 32 View FIGURE 32 )
Material examined. 1 ♀ (dissected) from Phallusia obesa , Vanuatu, Stn 581, Debitus coll., 1996.
Supplementary description of female. Body ( Fig. 31A View FIGURE 31 ) dorsoventrally depressed, 2.09 mm long, with relatively large prosome and small urosome. Prosome withparallellateral margins.Cephalosome short, 385×618 μm, with concave posterodorsal margin. First pedigerous somiteshort, lacking epimera.Secondandthirdpedigerous somites with well-developed epimera, 138×618 and 153×611 μm, respectively. Fourthpedigerous somite forming brood pouch incorporating fifth pedigerous somite, about 1.9 times as long as wide (1171×611 μm), with rounded posterior margin. Free urosome ( Fig. 31B View FIGURE 31 ) 5-segmented; somites much wider than long, 42×141, 53×124, 47×108, 44×92, and 45×82 μm, respectively. Anal somite telescoped into third abdominal somite in observed specimen; anal operculum well-developed, extending beyond posterior margin of somite ( Fig. 31C View FIGURE 31 ). Caudal ramus ( Fig. 31C View FIGURE 31 ) short, about 1.3 times longer than wide (45×34 μm), armedwith 6 setae (setae II and III omitted in Fig. 31C View FIGURE 31 ) and ornamented with 2 dorsal setules and short, tapering tube pore (indicated by arrowhead).
Rostrum ( Fig. 31D View FIGURE 31 ) directed posteriorly, tapering towards blunt apex. Large triangular tubercle present posterior to rostrum ( Fig. 31D View FIGURE 31 ). Antennule slender; segmentation and setation not observed due to damage. Antenna ( Fig. 31E View FIGURE 31 ) slender: coxa obscure; basiswith 2 large pinnate exopodal setae of equal length; endopod 2-segmented; first segment with 1 inner seta; compound distal segment elongate, about 5 times longer than wide, and armed with 10 setae plus terminal claw about onethirdaslongas segment.
Labrum ( Fig. 31F View FIGURE 31 ) with straight posterior margin bearing setules. Mandible ( Fig. 31G View FIGURE 31 ) consistingof coxa and palp: coxa with 4 teeth and 1 setaon gnathobase: palp consistingof basis, exopod and endopod; basis with setules on outer and medial margins and armed with 1 setaonmedial margin; exopodwith 5 setae, distalmost markedly larger than other 4; endopod 2-segmented and armed with 2 and 7 setae on first and second segments, respectively; suture line obscure between basis and first endopodal segment. Maxillule ( Fig. 31H View FIGURE 31 ) with 10 setae on arthrite, 1 on coxal endite, 2 on epipodite, 3 onmedial margin of basis (2 small proximal and 1 larger distal), 4 on small exopod, and 5 on incompletely 2-segmented endopod (2 on first and 3 on second segment). Maxilliped ( Fig. 31J View FIGURE 31 ) with 9, 0, and 2 setae on first to third segments; second segment with prominent bulbous swelling distally; third segment small, tapering, 1 seta fused with segment, lacking articulation at base.
Leg 1–4 with 3-segmented rami; coxa narrow; basis obliquely elongated. Inner coxal seta pinnate in leg 1 ( Fig. 32A View FIGURE 32 ) and leg 3, but naked in leg 2 ( Fig. 32B View FIGURE 32 ) and leg 4. Outer seta on basis small and naked in legs 1 and 4 but pinnate in legs 2 and 3. Armature formula as in generic diagnosis although third exopodal segment of leg 4 not observed due to damage.
Leg 5 ( Figs. 31B View FIGURE 31 , 32C View FIGURE 32 ) represented by 2 knobs on posterior margin of brood pouch, each tipped by naked seta, inner (exopodal) knob articulated at base.
Male. Not found.
Remarks. This is the type species of the genus ( Illg, 1958). This single female from Vanuatu is tentatively identified as P. scutiformis on the basis of the following shared characteristics: the prosome of the female has parallel lateral margins and the caudal ramus is short, only slightly longer than wide (1.25 times longer than wide, according to Schellenberg, 1922) and as long as anal somite.
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.