Petalosarsia longicauda, Akiyama, Tadashi & Gerken, Sarah, 2012
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publication ID |
https://doi.org/ 10.5281/zenodo.212026 |
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DOI |
https://doi.org/10.5281/zenodo.6168538 |
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persistent identifier |
https://treatment.plazi.org/id/576687B4-707A-F633-08BE-FA9EB779BFB1 |
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treatment provided by |
Plazi |
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scientific name |
Petalosarsia longicauda |
| status |
sp. nov. |
Petalosarsia longicauda View in CoL sp. nov.
( Fig. 18 View FIGURE 18 )
Material examined. Holotype subadult male, 4.25 mm (NSMT-Cr 22089), 06°18.41ˏN, 119°10.82ˏ– 06°18.65ˏN, 119°11.34ˏE, 1131–1392 m (KH-00-1, St. B2-5), 23 February 2000.
Description. Subadult male ( Fig. 18 View FIGURE 18 ). Carapace length 0.28 times total body length ( Fig. 18 View FIGURE 18 A), length 1.78 times greatest width and 1.89 times depth; anterior portion with lateral carina, with 4 teeth; very weak dorsolateral carina with 4 teeth present on anterior portion ( Fig. 18 View FIGURE 18 B); dorsal surface arched; transverse ridge near hind margin absent; frontal margin between lateral carina 0.73 times greatest width of carapace; pseudorostrum 0.20 times length of carapace; width of eye lobe 0.18 times width of carapace. Pereon 0.51 times carapace. Pleon 0.58 times total body length, with 2 pairs of pleopods ( Fig. 18 View FIGURE 18 A).
Antenna 1 ( Fig. 18 View FIGURE 18 C) 1st article of peduncle 1.3 times combined length of 2nd and 3rd; main flagellum of 5 articles; accessory flagellum of 3 articles, 0.27 times main flagellum. Antenna 2 ( Fig. 18 View FIGURE 18 D) peduncle with plumose seta; flagellum of 21 articles. Maxilliped 3 ( Fig. 18 View FIGURE 18 E) basis 1.25 times remaining distal articles, without seta on inner margin.
Pereopod 1 ( Fig. 18 View FIGURE 18 F) basis 1.3 times combined length of ischium and carpus; carpus length 1.9 times its width, 3.1 times dactylus length, 0.66 times basis length. Pereopod 2 ( Fig. 18 View FIGURE 18 G) basis 0.94 times remaining distal articles. Pereopods 3, 4 ( Fig. 18 View FIGURE 18 H, I) basis broad at base, 2.05 and 1.4 times length of remaining distal articles respectively. Pereopod 5 ( Fig. 18 View FIGURE 18 J) basis 0.95 times length of remaining distal articles. Pleopod 1 ( Fig. 18 View FIGURE 18 K) undeveloped, with a few short setae on tip of rami. Pleopod 2 with minute rami ( Fig. 18 View FIGURE 18 L).
Uropod ( Fig. 18 View FIGURE 18 M) peduncle 1.13 times pleonite 6 length, 0.53 times exopod length,0.45 times endopod length; exopod 0.84 times endopod length, with 7 short setae on inner margin, 2 short setae on outer margin, terminal setae lost during collection; endopod with 4 spiniform setae on inner margin, 2 terminal setae. Telson ( Fig. 18 View FIGURE 18 M) semicircular, 0.41 times pleonite 6.
Etymology. The species name refers to the elongate pleon.
Distribution. South of the Sulu Sea, Philippine, 1131–1392 m.
Remarks. This species is separated from other members of the genus by the combination of (1) dorsal surface of carapace arched, anterior portion of lateral margin with very weak ridge with four teeth, (2) pleon rather long, 0.58 times total body length, (3) inner margin of basis of maxilliped 3 and pereopods without plumose setae, (4) uropod exopod with a row of several thin setae on inner margin.
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.