Styloptocuma anae, Petrescu, 2018

Petrescu, Iorgu, 2018, On the Family Nannastacidae (Crustacea, Cumacea) from the Australian Museum Collection, Records of the Australian Museum 70 (1), pp. 1-111 : 48

Styloptocuma anae sp. nov.

Fig. 54

Holotype ♀, 6.7 mm, P.90705, Australia, NSW, east of Newcastle , -33.06° 152.81°, 2632–2698 m, Menzies trawl, 8 Oct 1982, R. T. Springthorpe, W.F. Ponder, RV Tangaroa , U216, in AM.

Etymology. The species is dedicated to my daughter, Ana- Maria, with all the love of her father.

Diagnosis. Carapace 0.3 entire body length, densely spiny, 3 pairs of longer spines on pseudorostrum and 4 pairs in posterior extremity; pereopod 1 carpus 1.5 propodus length; pereopod 2 carpus 2nd longest article, longer than propodus and dactylus together; 1 uropod peduncle broken, other one without rami, peduncle 3.3 pleonite 6 length.

Description. Carapace 0.33 body length, 1.6 longer than high; upturned pseudorostrum, 0.4 carapace length; densely spiny, 4 pairs of longer spines on pseudorostrum and in posterior extremity; anterolateral margin densely serrated; large antennal notch ( Fig. 54 A ). — Pereonites and pleonites with similar integument, pleonites with 1, 2, 2, 4, 3, 2 spines dorsally and 1, 1, 3, 0, 3, 0 spines ventrally. — Antenna 1 peduncle article 1 1.4 rest of article’s length, serrate margins; article 2 1.4 article 3 length, with 2 pedunculate setae; main flagellum 0.7 article 3; accessory flagellum with 1 article; aesthetascs 2.3 main flagellum length ( Fig. 54 B ). — Maxilliped 3 basis 1.1 rest of article’s length, with 2 plumose setae; basis to carpus with serrate margins; merus 3.3 ischium length, with 1 plumose seta; carpus 1.6 merus length, with 2 plumose setae; propodus as long as carpus, with 1 simple and 2 pappose setae; dactylus 0.4 propodus length, with 3 simple setae; with exopod ( Fig. 54 C ). — Pereopod 1 basis 0.7 rest of article’s length, with serrated medially; merus 3 ischium length; carpus 2.6 merus length, with 2 simple setae; propodus 0.6 carpus length, with 1 simple seta; dactylus broken; with exopod ( Fig. 54 D ). — Pereopod 2 basis 0.6 rest of article’s length; merus 7 ischium length; carpus 2.7 merus length, with 4 simple setae; basis to carpus serrated medially; dactylus 2.3 propodus length; with exopod ( Fig. 54 E ). — Pereopod 3 –5 with decreasing basis and increasing carpus length; dactylus fused with terminal seta ( Fig. 54 F–H ). — Uropod peduncle 3.3 pleonite 6 length, with broken, missing, rami, the other peduncle, broken ( Fig. 54 A ).

Remarks. Styloptocuma anae sp. nov. is closely related to Styloptocuma sp. in its spiny integument. It differs in the: less densely spinose integument of body and appendices, shorter spines, antenna 1 with peduncle article 1 shorter, pereopod 1 with longer carpus than propodus, pereopod 2 with shorter dactylus, uropod with longer peduncle.

Distribution. Australia: NSW—east of Newcastle, at 2698 m depth.

Figures

Figure 54. Styloptocuma anae sp. nov. Holotype female (A) body, lateral view; (B) antenna 1; (C) maxilliped 3; (D) pereopod 1; (E) pereopod 2; (F) pereopod 3; (G) pereopod 4; (H) pereopod 5. Scales:A 1 mm; B–H 0.5 mm.