Nuberis areolaticola Bamber & Marshall, 2015, sp. nov.
Creators: name: Bamber, Roger N.
name: Marshall, David J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Tanaidacea
Leptocheliidae
Nuberis
Nuberis areolaticola

description: Nuberis areolaticola sp. nov.
Figs 4–5
Material: Holotype. Brooding female, (NHMUK 2015. 2877), sample DAR, 05°54′28.5"N 114°38′23.3"E, 20 m depth, sand, March, 2009.
Paratypes. Two brooding ♀♀, (NHMUK 2015. 2878 - 2879), one ♀ (dissected, not retained), sample B13, 04°51′06"N 114°35′26"E, 20 m depth, sand; three ♀♀ (one brooding), (NHMUK 2015. 2880 - 2882), sample DA1; one ♀, one juvenile, (NHMUK 2015. 2883–2884), sample DA2; both 05°54′28.5"N 114°38′23.3"E, 20 m depth, sand, March, 2009.
Description of brooding female. Body (Fig. 4 A) slender, nine times as long as wide, holotype 2 mm long. Cephalothorax subrectangular, 1.5 times as long as wide, shorter than pereonites 1 and 2 together, with slight rostrum, eyelobes rounded, eyes present and brown (pigment absent in some preserved material). Pereonites with paired (pereonites 1–5) or single (pereonite 6) lateral setae; pereonite 1 half as long as cephalothorax and 1.3 times as wide as long; pereonites 2 to 4 subequal in length, 1.7 times as long as pereonite 1 and about 1.3 times as long as wide; pereonite 5 as long as wide, 1.4 times as long as pereonite 1; pereonite 6 shortest, half as long as pereonite 5 and 1.6 times as wide as long. Pleon as long as pereonite 5; each pleonite about six times as wide as long, naked. Pleotelson subrectangular, as long as last two pleonites together, twice as wide as long, with four fine distal setae.
Antennule (Fig. 4 B) of three articles, flagellum fused to third article; proximal article 3.4 times as long as wide, 1.8 times as long as distal two articles together, with proximal and distal single penicillate and single simple setae on outer margin; second article about twice as long as wide, one-quarter as long as first article, three simple distal setae all shorter than article; third article 1.3 times as long as second, with five distal setae and one aesthetasc.
Antenna (Fig. 4 C) proximal article compact, naked; second article as long as wide, distally with slender ventral and dorsal spines; third article shorter than second, with dorsodistal slender spine; fourth article longest, 4.5 times as long as wide and three times as long as third, with short mid-length seta and three distal simple setae; fifth article half as long as fourth, with two distal setae; flagellum minute, with five distal setae.
Labrum not recovered. Left mandible (Fig. 4 D) with crenulate lacinia mobilis bearing inner-distal extension, coarse distal crenulation on pars incisiva, pars molaris blunt without rugosity; right mandible (Fig. 4 E) similar but without lacinia mobilis, pars incisiva distally bifid and with twelve fine marginal crenulations. Labium (Fig. 4 F) wide, bilobed, distally finely setose. Maxillule (Fig. 4 G) endite with eight distal spines and sparse marginal setae, palp with two distal setae. Maxilliped (Fig. 4 H) palp first article naked, second article with three inner setae, no outer seta; third article with five inner marginal setae in distal half, proximal inner margin finely setulose; fourth article with distal row of four simple setae and one mesial and two outer subdistal setae; basis with one distal seta; endites distally with fine outer setules, outer simple seta, two pointed spines and one rounded inner blunt spine. Epignath (Fig. 4 I) slender, distally with marginal setules and one slender seta.
Cheliped (Fig. 5 A) with rounded, comparatively slender basis 2.8 times as long as wide, naked; merus triangular with one ventral seta; carpus 2.5 times as long as wide, with three ventral setae and two dorsal marginal setae; propodus 1.4 times as long as wide, with inner distal “comb” of one seta with adjacent microtrichia (Fig. 5 A ′), outer seta at base of dactylus; fixed finger with two ventral setae and three setae adjacent to slightly crenulate cutting edge; dactylus with inner proximal seta.
Pereopod 1 (Fig. 5 B) longer than other pereopods, coxa with seta; basis sinuous, four times as long as wide, with single dorsoproximal simple seta; ischium compact with one ventral seta; merus one-third as long as basis, naked; carpus 1.6 times as long as merus, with dorsal seta longer than width of carpus; propodus 1.9 times as long as carpus, with two setae on subdistal dorsal mound and one subdistal ventral seta; dactylus slender, extending into shorter slender unguis 0.6 times as long as dactylus, the two together 1.2 times as long as propodus. Pereopod 2 (Fig. 5 C) more compact than pereopod 1; basis three times as long as wide, with dorsoproximal simple seta; ischium with one ventral seta; merus 0.4 times as long as basis, naked; carpus 1.2 times as long as merus, with single fine ventrodistal seta; propodus 1.3 times as long as carpus, with two distal setae; dactylus and short unguis curved, together 0.6 times as long as propodus. Pereopod 3 (Fig. 5 D) as pereopod 2.
Pereopod 4 (Fig. 5 E) basis stout, 2.3 times as long as wide, naked; ischium with two ventrodistal setae; merus 0.3 times as long as basis, with paired ventrodistal spines; carpus 1.3 times as long as merus, with outer, ventral and inner distal spines (Fig. 5 E ′); propodus as long as carpus, with two ventrodistal spines, three dorsodistal setae two of which being as long as dactylus; dactylus and unguis apparently fused, half as long as propodus. Pereopod 5 (Fig. 5 F) as pereopod 4, but carpus shorter than merus, propodus nearly twice as long as carpus. Pereopod 6 (Fig. 5 G) as pereopod 5.
Pleopods (Fig. 5 H) all alike, all setae plumose; basis naked, endopod without inner seta but with five distal setae; exopod with seven distal and one proximal setae.
Uropod (Fig. 5 I) biramous, basis naked; exopod of two segments, 1.3 times as long as proximal endopod segment, setose as figured; endopod of four segments, distal segments slender.
Male unknown.
Etymology. From the Latin— areolata-icola —a dweller in small spaces, i.e. interstitial (adjectival).
Remarks. Nuberis areolaticola sp. nov. was taken sparsely in clean sands at 20 m depth. Aspects of its morphology attributed to its interstitial mode of life are similar to those discussed above under Brunarus colekanus. It is most-easily distinguished from that species at the whole-animal level by its proportionately longer first pereonite.
description: Published as part of Bamber, Roger N. & Marshall, David J., 2015, Tanaidaceans from Brunei, V. The Leptocheliidae (Crustacea: Peracarida: Tanaidacea), with four new species, pp. 342-360 in Zootaxa 3948 (3) on pages 348-349, DOI: 10.11646/zootaxa.3948.3.2, http://zenodo.org/record/233481