Cyclaspoides erugatus, Corbera, 2008

Corbera, Jordi, 2008, Deep-sea Bodotriidae (Crustacea: Cumacea) from New Caledonia, Fiji and Indonesia, Zoological Journal of the Linnean Society 152 (2), pp. 227-254 : 241-243

CYCLASPOIDES ERUGATUS SP. NOV. ( FIGS 14 , 15 )

Type material: Holotype: preadult female dissected in two slides, New Caledonia, BIOCAL, stn CP72, 22°09.02′S, 167°33.18′E, 2100–2110 m, 4.ix.1985 (MNHN-Cu1088) . Paratypes: same station as holotype, 2 preadult females (MNHN-Cu1089); stn DS98, 21°24.60′S, 166°30.16′E, 2365–2470 m, 7.ix.1985, 1 preadult female (MNHN-Cu1090); stn DS04, 21°15.88′S, 166°39.38′E, 2340 m, 11.viii.1985, 1 preadult female (MNHN-Cu1091).

Diagnosis: Mandible with 17 setae between pars inscisiva and pars molaris. Uropods slightly shorter than pleonite 6, peduncle with a small tooth on inner distal margin; endopod 1-articulated, slightly longer than peduncle, with 2–3 setae on inner margin.

Description: Preadult female 4.6 mm total length. Carapace ( Fig. 14A ) slightly shorter than one-third total length, globose. Pseudorostral lobes relatively long, with long siphons (broken in the holotype and in most specimens). Eyelobe without optical elements. Antennal notch deep, anterolateral angle acute; anterolateral margin serrate (six teeth on lower margin and one in antennal notch). Pereonite 1 not visible, pereonites 2 and 3 fused dorsally with carapace.

Antennule ( Fig. 14B ), peduncle article 1 longest; article 3 longer than article 2; main flagellum 2-articulate, with one aesthetasc, accessory flagellum rudimentary. Right mandible ( Fig. 14C ) with three teeth on the pars incisiva, 17 setae between pars incisiva and pars molaris (also 17 setae on left mandible). Maxillule ( Fig. 14D ) palp with a single filament, inner endite with five setae, three simple, one trifid and one serrulate. Maxilla ( Fig. 14E ), endites with simple and serrulate setae.

Maxilliped 1 ( Fig. 14F ) basis with four setae on inner margin, distally produced reaching carpus; carpus with five bi-dentate flattened setae on the inner margin and a pappose seta on distal outer corner; propodus with two flattened comb-like and a plumose setae on distal inner corner. Maxilliped 2 ( Fig. 14G ) basis slightly longer than rest of appendage; carpus longer than merus, with a plumose and a forked setae on inner margin. Maxilliped 3 ( Fig. 15A ), basis nearly twice long as rest of appendage, expanded distally reaching half merus length, with three plumose setae on inner margin of projection and two long plumose setae on the tip; merus produced distally over carpo-propodial articulation with a long plumose seta on its tip; carpus and propodus of similar length, the first with a plumose seta on distal outer corner. Pereopod 1 ( Fig. 15B ), basis as long as rest of appendage; ischium and merus short; carpus and propodus of the same length; dactylus half length of propodus. Pereopod 2 ( Fig. 15C ), basis longer than rest of appendage, with a plumose seta on the margin; ischium fused with basis; merus with a seta distally; carpus and propodus of similar length; dactylus as long as merus, with five long cuspidate setae terminally. Pereopods 3 and 4 ( Fig. 15D, E ), basis slightly shorter than rest of appendage; merus longer than ischium and shorter than carpus, with a simple distal seta; propodus with a long simple seta on distal corner. Pereopod 5 ( Fig. 15F ), basis rather shorter than rest of appendage; merus nearly as long as carpus, both with a long simple seta on distal corner.

Uropods ( Fig. 15G ) slightly shorter than pleonite 6, peduncle with a small tooth on inner distal margin; endopod 1-articulated, slightly longer than peduncle, with 2–3 setae on inner margin; exopod longer than endopod, with four setae on the magin and a longer one distally.

Etymology: From the Latin erugo, meaning clear of wrinkles, referring to its smooth carapace.

Remarks: Three species of Cyclaspoides are known, C. sarsi Bonnier, 1896 , C. pellucidus Day, 1978 and C. bacescui Petrescu, 1995 . C. pellucidus has the uropod endopod 2-articulated and in C. bacescui the uropod is longer than pleonite 6, the uropod peduncle being half length of endopod. C. erugatus is closely related to C. sarsi but differs mainly from it by a lower number of setae on the uropod endopod and the small tooth on inner distal margin of uropod peduncle.

Figures

Figure 14. Cyclaspoides erugatus sp. nov. preadult female holotype: A, whole animal in lateral view; B, antenna 1; C, right mandible; D, maxilla 1; E, maxilla 2; F, maxilliped 1; G, maxilliped 2.

Figure 15. Cyclaspoides erugatus sp. nov. preadult female holotype: A, maxilliped 3; B, pereopod 1; C, pereopod 2; D, pereopod 3; E, pereopod 4; F, pereopod 5; G, uropod.