Campylaspis elenaionuti, 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 : 12-13

Campylaspis elenaionuti sp. nov.

Figs 9 , 10

Holotype subadult ♀, 4.21 mm, P.88262, Tasman Sea, Lord Howe Rise , -27.9832° 162.8592°, 1250 m, epibenthic sled, coarse sediment with pumice, 6 May 1989, J.K. Lowry & party, RV Franklin, FR 0589-28, in AM . Paratypes: allotype ♂, P.88261; 1♀, P.88263, both same data as holotype .

Etymology. The species is dedicated to my younger colleagues, Drs Ionuţ and Elena Iorgu, renown orthopteran specialists.

Diagnosis. Carapace, depressed in lateral view, elongated; integument of carapace, pereon and pleon densely covered with small acute tubercles and pits; maxilliped 2 carpus with a big tooth medially dactylus with 3 dactylar teeth.

Description of female. Carapace depressed in lateral view, 2.42 as long as high, 1.74 as long as wide; very small antennal notch; pseudorostrum, 0.32 carapace length, part of siphon exceeding carapace as long as pseudorostrum; pseudorostrum 0.3 carapace length; carapace integument, pereon and pleon densely covered with small acute tubercles and small pits ( Fig. 9 A, B, C ). — Antenna 1 peduncle with serrate margins, article 1 0.83 rest of article’s length, with 2 sensory setae, article 2 0.68 article 1, with 3 simple setae, article 3 with 1 small tooth; main flagellum 0.8 peduncle article 3, accessory flagellum with 1 article; aesthetascs as long as main flagellum ( Fig. 9 D ). — Maxilliped 1 basis with 3 pappose, 2 hook setae and 1 simple seta; carpus with 2 pappose and 6 simple setae; dactylus 0.2 carpus length, with hyaline fringe ( Fig. 9 E ). — Maxilliped 2 basis with 1 plumose long seta; merus 2 ischium length, short plumose seta; carpus 1.2 merus length, with 1 plumose and 1 strong tooth; propodus 0.75 carpus length, with 1 simple robust seta; dactylus with 3 dactylar teeth ( Fig. 9 F ). — Maxilliped 3 basis 0.64 rest of article’s length, with 5 pappose setae; ischium with 1 pappose seta; merus 5.33 ischium length, with 1 simple and 3 pappose setae, 2 teeth laterally; carpus 0.56 merus length, with 1 simple, 1 long plumose seta and 3 pappose setae, 3 strong teeth; propodus as long as carpus, with 2 pappose setae, 1 plumose seta and 3 teeth; dactylus 0.8 propodus length, terminal seta 1.41 dactylus length; with exopod ( Fig. 9 G ). — Pereopod 1 basis 0.7 rest of article’s length, 2 pappose and 2 simple short setae; ischium to propodus with serrate margins, 1 pappose seta; merus 2.35 ischium length, with 4 pappose and 2 simple setae; carpus 1.23 merus length, with 1 simple and 4 pappose setae; propodus 0.68 carpus length, with 1 simple seta and 6 pappose setae; dactylus 0.54 propodus length, with 4 simple and 2 pappose setae; with exopod ( Fig. 9 H ). — Pereopod 2 basis 0.6 rest of article’s length, with 1 simple and 2 pappose setae; ischium with 1 tooth; merus 2.4 ischium length, with 2 pappose setae; carpus 2.2 merus length, with 4 pappose setae; dactylus 2.77 propodus length, with 3 plumose, 3 pappose, 4 simple setae on lateral margin and 1 terminal plumose seta 0.8 dactylus length; with exopod ( Fig. 9 I ). — Pereopods 3–5 with decreasing basis and increasing carpus; dactylus fused with terminal robust long seta ( Fig. 9 J-L). — Uropod peduncle 2.71 pleonite 6 length, 2.05 endopod length, serrate margins and medially; exopod 0.8 endopod length, with 1 simple and 2 microserrate setae; endopod with 3 simple and 2 microserrate setae ( Fig. 9 M ).

Description of male. Body length 3.95 mm. — Carapace 0.45 body length, elongated, 2 as long as high, 2 posterior crests; pseudorostrum 0.34 carapace length, with serrate anterior margin; 0.5 of ventral margin serrate; eyeless ocular lobe ( Fig. 10 A ). — Pereonites 3–5 with mid-dorsal spines. — Pleonites 1–5 with mid-dorsal spines. — Antenna 1 basal article of peduncle 0.68 rest of article’s length, serrate medial margin of basal article and both margins of other 2 articles; main flagellum 1.29 apical article of peduncle length, short aesthetascs ( Fig. 10 B ). — Maxilliped 3 basis 0.53 rest of article’s length, 3 pappose setae on medial margin, other 2 on lateral margin; 2 pappose setae on serrate margin of ischium; merus 2.5 ischium length, 1 simple seta on medial margin, 1 pappose seta on lateral; carpus 0.68 merus length, 4 simple and 3 pappose setae; propodus 0.76 carpus length, with 2 teeth and 3 pappose setae; dactylus 0.85 propodus length, 2 setae longer than dactylus; with exopod ( Fig. 10 C ). — Pereopod 1 basis 0.56 rest of article’s length, 2 pappose and 2 setae; merus 2.5 ischium length, with 2 pappose and 3 simple setae; carpus as long as merus, 1 simple and 4 pappose setae; propodus 0.6 carpus length, with 7 pappose setae; dactylus with 3 pappose and 3 simple setae; with exopod ( Fig. 10 D ). — Pereopod 2 basis 0.85 rest of article’s length, 2 long pappose setae on lateral margin; ischium with 1 pappose seta; merus 6.5 ischium length, with 1 pappose seta; carpus 2.3 merus length, with 3 pappose and 1 simple seta; propodus 0.33 carpus length, with 1 simple seta; dactylus broken; with exopod ( Fig. 10 E ). — Pereopods 3–5 with decreasing basis decreasing and increasing carpus; pereopod carpus with serrate margins, pereopod 5 only medially; propodus with annulate seta; dactylus fused with terminal seta; pereopods 3 and 4 with exopods ( Fig. 10 F-H). — Uropod peduncle 3 pleonite 6 length, with serrate margins, 1.58 endopod length; exopod 0.81 endopod length, both rami with serrate margins, with 4 simple and 1 microserrate terminal seta; endopod with 1 simple, 2 short robust simple and 1 terminal microserrate seta ( Fig. 10 I ).

Remarks. Campylaspis elenaionuti sp. nov. is similar to C. wardi Băcescu, 1991 , C. oanalexandru sp. nov., C. mioarae sp. nov., C. paucai sp. nov. and C. grossui Petrescu, 2006 in having 1 strong tooth medially on the margin of the carpus (much stronger in C. elenaionuti ). Campylaspis elenaionuti also has a similar slender maxilliped 3 merus as in C. aureliani sp. nov., C. chisamerai sp. nov., C. echinata Hale , C. grossui Petrescu , C. guerragarciai sp. nov., C. johnstoni Hale, 1937 , C. longidentata Petrescu , C. lynseyae Petrescu , C. nowrae Petrescu , C. oanalexandru sp. nov., C. paucai sp. nov., C. pustulosa Hale, 1945 , C. serrata Petrescu , C. stanae sp. nov., C. tasmaniensis Petrescu , C. trisulcata Petrescu, 2006 , C. udrescui sp. nov. and C. wardi Băcescu. It differs mainly in the longer carapace with longer pseudorostrum, pereopod 2 dactylus with 3 terminal plumose setae equal in length, uropod endopod 1 seta in female and 2 in male.

Distribution. Tasman Sea—Lord Howe Rise, at 1250 m depth.

Figures

Figure 9. Campylaspis elenaionuti sp. nov. Holotype female (A) body, lateral view; (B) carapace, dorsal view; (C) detail of carapace integument; (D) antenna 1; (E) maxilliped 1; (F) maxilliped 2; (G) maxilliped 3; (H) pereopod 1; (I) pereopod 2; (J) pereopod 3; (K) pereopod 4; (L) pereopod 5; (M) uropod. Scales: A,B 1 mm; D 0.25 mm; E–K,M 0.5 mm; L 0.5 mm.

Figure 10. Campylaspis elenaionuti sp. nov. Paratype male (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; (I) uropod. Scales: A 1 mm; B 0.25 mm; C–I 0.5 mm.