Notonyx musuppocenta, Clark, Paul F. & Ng, Peter K. L., 2011

Clark, Paul F. & Ng, Peter K. L., 2011, A new species of Notonyx A. Milne-Edwards, 1873 (Crustacea: Decapoda: Brachyura: Goneplacidae) from the Philippines, Zootaxa 2982, pp. 27-32 : 27-30

publication ID	https://doi.org/ 10.5281/zenodo.205267
DOI	https://doi.org/10.5281/zenodo.6182656
persistent identifier	https://treatment.plazi.org/id/03A88000-FFD8-4A60-E8CE-F94DFCE0AD19
treatment provided by	Plazi
scientific name	Notonyx musuppocenta
status	sp. nov.

Treatment

Notonyx musuppocenta View in CoL n. sp.

( Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Material. Holotype, 3 (8.09 × 6.71 mm) ( USNM 46323), station 5159, ca. Tinakta I., (N), N 82°W, 2.3 km (5° 11ʹ 50ʺ N, 119° 54ʹ E), Tawi Tawi Group, Sulu Archipelago, Philippines, 18–22 m depth coll. Albatross Philippine Expedition 1907–9, U.S. Bureau of Fisheries, 21 February 1908. Paratype: 1 Ƥ (6.64 × 5.10 mm) ( USNM 1150302), same data as holotype.

Diagnosis. Holotype 3: carapace subrectangular, about 1.2 times wider than long ( Figs. 1 View FIGURE 1 A, C), frontal margin gently sinuous, about a third carapace width ( Figs. 1 View FIGURE 1 A, C); dorsal surface smooth, gently convex anteriorly, posteriorly, without indication of regions ( Figs. 1 View FIGURE 1 A, C, 2B, C). Anterolateral margin short, entire, gently convex, unarmed; posterolateral margin gently concave ( Fig. 1 View FIGURE 1 A, C). Cornea pigmented, small ( Figs. 1 View FIGURE 1 A, C, 2A, C). Small gape present between third maxillipeds when closed; ischium subquadrate; merus quadrate, distinctly shorter than ischium, anteroexternal angle of distinctly right angled ( Fig. 3 View FIGURE 3 A). Chelipeds subequal ( Fig. 1 View FIGURE 1 A, C), outer surfaces smooth, with prominent keel on ventral margin extending almost to tip of finger ( Fig. 2 View FIGURE 2 B, C); dorsal margin of propodus smooth, unarmed; inner margin of carpus with low tooth, inner margin finely denticulate to almost smooth ( Figs. 1 View FIGURE 1 A, C, 2C). Ambulatory legs relatively long, surfaces smooth, margins lined with numerous setae ( Fig. 1 View FIGURE 1 A, C). Thoracic sternum relatively broad; surface microscopically pitted; sternites 1, 2 completely fused, separated from sternite 3 by distinct transverse suture; sternites 3, 4 fused except for lateral parts ( Fig. 1 View FIGURE 1 B). Abdomen relatively broad, somite 3 broadest; telson broadly triangular ( Figs. 1 View FIGURE 1 B, 3B). G1 gently curved outwards, relatively stout, inner margin of subdistal part with numerous long sharp setae ( Fig. 4 View FIGURE 4 A-D); G2 much longer than G1, distal segment longer than basal segment, distinctly sinuous with tip recurved ( Fig. 4 View FIGURE 4 E-H).

Female. The female agrees with the male in all major non-sexual characters. The abdomen is ovate, not covering entire thoracic sternal surface. The vulva is typical for members of the genus, being relatively large, occupying anterior half of thoracic sternite 6, without visible sternal vulvar cover.

Etymology. The name is arbitrarily derived from the Museum Sorting Centre of the Smithsonian Institution at Alexandria, Washington D.C. in acknowledgement to all the staff at Silver Hill for making our EDIT (European Distributed Institute of Taxonomy) group so welcome. It is used as a noun in apposition.

Remarks. Notonyx musuppocenta n. sp., is allied to N. nitidus A. Milne-Edwards, 1873 , but can be separated from it by the anteroexternal edge of the third maxilliped being more angular and the ischium relatively shorter ( Fig. 3 View FIGURE 3 A) (anteroexternal angle more rounded with a proportionately longer ischium in N. nitidus ; Clark & Ng 2006: fig. 3B), the male abdomen, especially somite 3 and telson, is relatively broader ( Fig. 3 View FIGURE 3 B) (somite 3 and telson of male abdomen relatively less broad; Clark & Ng 2006: fig. 3F); the G1 is relatively stouter with the inner margin of the subdistal part possessing numerous sharp setae ( Fig. 4 View FIGURE 4 A-D) (G1 relatively more slender with only short spines on the inner margin of the subdistal part in N. nitidus ; Clark & Ng 2006: fig. 3H, I), and the G2 has the distal segment distinctly sinuous with the tip recurved ( Fig. 4 View FIGURE 4 E-H) (strongly curved, appearing hook-like with leaflike distal part in N. nitidus ; Clark & Ng 2006: fig. 3G).