Campylaspis gherasimi, 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 : 15

Campylaspis gherasimi sp. nov.

Fig. 13

Holotype subadult ♂, 6.14 mm, P.64834, Australia, NSW, east of Long Reef , -33.72° 151.77°, 174 m, epibenthic sled, 20 Dec 1985, J.K. Lowry, R. T. Springthorpe, FRV Kapala , K85-21-08, in AM . Paratype: 1♂, P.88246.

Etymology. The species is dedicated in honour of Paul Gherasim, famous Romanian painter, as a sign of love and highly respect for all he has done for me and my family.

Diagnosis. Carapace, 0.44 body length, almost rectangular in dorsal view; maxilliped 3 basis, 0.83 rest of article’s length; pereopod 2 dactylus 2.6 propodus length; uropodal peduncle 2.4 pleonite 6, 1.85 endopod length; exopod 0.8 endopod length.

Description. Carapace, 0.44 body length, 2 as long as high, 1.38 as long as wide, almost rectangular in dorsal view, anterior margin rectangular, with median elevation, rounded anteroventral corner; large lateral sulcus opening posteriorly, transverse ridge on anterior part; pair of large crests on posterior end; eyelobe very small, without lenses; pseudorostrum 0.21 carapace length; carapace covering first 2 pereonites ( Fig. 13 A, B ). — Pleonites 1–4 each with pair of dorsal tubercles and pair of lateral crests, pleonite 5 with mid-dorsal ridge, 2 pairs of oblique ridges towards dorsal ridge, 1 pair of lateral crests, pleonite 6 without ornamentation. — Antenna 1 peduncle article 1 0.74 rest of article’s length; main flagellum 1.2 peduncle articles 1 and 2 length, accessory flagellum with 1 article; aesthetascs 0.7 main flagellum length ( Fig. 13 C ). — Maxilliped 3, basis, 0.83 rest of article’s length, with 3 plumose setae; ischium 0.08 basis length, with 1 tooth; merus 6.4 ischium length, serrate margins, with 2 plumose setae; carpus, 0.65 merus length, with serrate margins, with 2 pappose setae, 1 plumose seta; propodus 0.37 carpus length, with 5 pappose setae; dactylus 0.5 propodus length, with 3 simple setae; with exopod ( Fig. 13 D ). — Pereopod 1 basis 0.9 rest of article’s length; merus 6.6 ischium length; carpus 1.25 merus length, with 6 simple setae; propodus 0.6 carpus length, 5 simple setae; dactylus 0.6 propodus length, with 3 simple setae; with exopod ( Fig. 13 E ). — Pereopod 2, basis 0.6 rest of article’s length; ischium to dactylus much slender than basis; merus 5.5 ischium length, with 1 simple seta; carpus 1.5 merus length, with 5 simple setae; dactylus 2.6 propodus length, with 10 microserrate setae; with exopod ( Fig. 13 F ). — Pereopod 3, basis 1.4 rest of article’s length, with 1 simple seta; ischium with 1 simple seta; merus 1.6 ischium length, with 1 simple seta; carpus 2.25 merus length, with 2 simple setae; propodus 0.44 carpus length, with 1 annulate seta; dactylus 0.5 propodus length, fused with terminal robust seta; with exopod ( Fig. 13 G ). — Pereopod 4, basis 1.04 rest of article’s length; ischium with 1 simple seta; merus 2.2 ischium length, with 1 simple seta; carpus 2.18 merus length, with 2 simple setae; propodus 0.6 carpus length; dactylus 0.5 propodus length, fused with terminal robust seta; with exopod ( Fig. 13 H ). — Pereopod 5, basis 0.6 rest of article’s length; ischium 0.18 basis length, with 1 simple seta; merus 3 ischium length, with 1 simple seta; carpus 1.13 merus length, with 1 simple seta; propodus 0.4 carpus length, with 1 annulate seta; dactylus 0.5 propodus length, fused with terminal robust seta ( Fig. 13 I ). — Uropod peduncle 2.4 pleonite 6 length, 1.85 endopod length, serrate medially; exopod 0.8 endopod length, 1 subterminal simple and 1 terminal microserrate simple seta, 0.57 exopod length; endopod with 8 microserrate setae, 1 robust terminal microserrate seta, 0.57 endopod length ( Fig. 13 J ).

Remarks. The carapace of C. gherasimi sp. nov. is more rectangular in dorsal view than C. rectangulata Petrescu, 2006 , but has a transverse ridge anteriorly as in C. dumitrumurariui sp. nov. and C. edenensis Petrescu (2006) . The new species has a massive merus and carpus of maxilliped 3 as in C. mioarae sp. nov., but without a process on the medial margin of the basis; pereopod 2 dactylus without a digitiform tip like in C. dumitrumurariui , C. mioarae , not like in C. rectangulata ; the new species has an uropodal endopod with 8 medial setae, not like in other Australian species with 9 or 10 setae.

Distribution. Australia: NSW—east of Long Reef, at 174 m depth.

Figures

Figure 13. Campylaspis gherasimi sp. nov. Holotype subadult male (A) body, lateral view; (B) body, dorsal view; (C) antenna 1; (D) maxilliped 3; (E) pereopod 1; (F) pereopod 2; (G) pereopod 3; (H) pereopod 4; (I) pereopod 5; (J) uropod. Scales: A,B 1 mm; C 0.25; D–J 0.5 mm.