Arsipoda atra, Samuelson & Biondi, 2016

Samuelson, Allan & Biondi, Maurizio, 2016, Taxonomic revision of the genus Arsipoda Erichson, 1842 (Coleoptera, Chrysomelidae) in New Caledonia, European Journal of Taxonomy 230, pp. 1-61 : 8-10

Arsipoda atra sp. nov.

urn:lsid:zoobank.org:act:7BDC873B-2A3E-453B-8DF8-CD3CB0806018

Figs 1B , 6A , 8C , 11B , 14B

Diagnosis

Arsipoda atra sp. nov. shares a thickset and ovoid body with A. evax , A. povilaensis sp. nov. and A. transversa sp. nov. ( Figs 1B, F , 2D, I ). However, the new species can easily be distinguished from other species by its black, non-metallic integuments, and wide and flat elytral interstriae. Genitalia are also highly diagnostic ( Figs 8C, G , 9E , 10A , 11B, F, L, P ).

Etymology

The specific epithet is a Latin adjective that means black, dark.

Type material

Holotype

NEW CALEDONIA (N): ♂, Aoupinié , near Goipin rd jct [= road junction], -21.1739 165.3116, 700– 800 m, 20 Nov. 2010, M. Wanat & R. Ruta leg. ( MNHN).

Paratypes

NEW CALEDONIA: 1 ♀, same data as the holotype ( MNHW); 1 ♀, Aoupinié , - 21.18151165.30048, 790–830 m, 27 Nov. 2010, M. Wanat leg. ( MNHW) .

Description of the holotype (♂)

Body thickset, moderately convex ( Fig. 1B ); LB = 2.25 mm; maximum pronotal width at base (WP = 0.90 mm); maximum elytral width at basal third (WE = 1.18 mm). Dorsum blackish, non-metallic, paler on elytral disc and anterior part of pronotum. Frons and vertex finely microreticulate and finely punctate; head grooves moderately impressed, continued to postantennal region; genae and frontal carina short; antennae slightlty longer than ½ body length (LAN = 1.35 mm; LAN/ LB = 0.60), yellowish, gradually darker towards apex; LA: 100:77:64:64:91:82:91:91:91:91:132. Pronotum trapezoidal, distinctly transverse (LP = 0.50 mm; WP/LP = 1.80), laterally straight; anterior angles distinctly prominent; antebasal transverse sulcus weakly impressed, weakly sinuate, without clearly distinguishable lateral fovea; pronotal surface microreticulate, opaque, with small, dense punctures, distinctly impressed. Elytra slightly elongate (LE = 1.73 mm; WE/LE = 0.68), laterally clearly arcuate ( Fig. 6A ); punctuation slightly larger than on pronotum; surface finely microreticulate; interstriae regularly punctulate. Anterior and middle legs yellowish; hind legs brown; first pro- and mesotarsomeres moderately dilated; first metatarsomere in male distally slightly expanded on inner side; adhesive setae present on ventral side of first pro-, meso- and, partially, metatarsomeres. Venter brown; last abdominal ventrite laterally clearly incised, without special preapical impressions. Median lobe of aedeagus (LAED = 1.03 mm; LE/LAED = 1.67) ( Fig. 8C ) in ventral view laterally parallel, slightly narrower at basal ²⁄5s and toward apex; apex flat, elongate, with rounded margin; ventral surface with shallow median groove and two thin lateral carinae; in lateral view, median lobe strongly bent at basal fourth, with sinuate apical part; dorsal ligula quite short – from apical ²⁄5s to pre-apical part of aedeagus –, thin, tapered towards apex.

Biometry

Male (n = 1): LE = 1.73 mm; WE = 1.18 mm; LP = 0.50 mm; WP = 0.90 mm; LAN = 1.35 mm; LAED = 1.03 mm; LB = 2.25 mm; LE/LP = 3.45; WE/WP = 1.31; WP/LP = 1.80; WE/LE = 0.68; LAN/LB = 0.60; LE/LAED = 1.67.

Female (n = 2): LE = 1.95, 1.73 mm; WE = 1.33, 1.20 mm; LP = 0.58, 0.50 mm; WP = 1.01, 0.89 mm; LAN = 1.35, 1.25 mm; LSPc = 0.16, 0.16 mm; LB = 2.59, 2.25 mm; LE/LP = 3.39, 3.45; WE/WP = 1.31, 1.35; WP/LP = 1.76, 1.78; WE/LE = 0.68, 0.70; LAN/LB = 0.52, 0.56; LE/LSPc = 12.50, 10.78.

Paratypes (females) very similar in shape and sculpture to the holotype. Dorsum evenly black. Antennae slightly shorter. Spermatheca ( Fig. 11B ) with small, subrounded basal part; collum thickened, tapered towards apical part, elongate; ductus thin, elongate, preapically inserted on dorsal side, single-coiled.

Distribution

Endemic to the Aoupinié area, Central Grande Terre ( Fig. 14B ).

Ecological notes

No ecological notes are available for this species, but collecting localities are located in a dense, evergreen humid forest area between 700 and 830 m a.s.l. Pollen found in the gut of some specimens.

Figures

Fig. 1. Habitus. A. Arsipoda agalma Samuelson, 1973, Mt Panié. B. A. atra sp. nov, Aoupinié. C. A. communis sp. nov, Mt Do. D. A. doboszi sp. nov, Haute Rivière Bleue. E. A. elongata sp. nov, Mt Humboldt. F. A. evax Samuelson, 1973, Koghi Mts. G. A. geographica Gómez-Zurita, 2010, Haute Rivière Bleue. H. A. gressitti sp. nov., Farino. I. A. isola Samuelson, 1973, Bois du Sud.

Fig. 6. A–C. Elytra. A. Arsipoda atra sp. nov., Aoupinié. B. A. geographica Gómez-Zurita, 2010, Dzumac Mts (base). C. A. shirleyae Samuelson, 1973, Chute de la Madeleine. D. Prosternum of A. punctata sp. nov., Mueo. E. Hind tibia and tarsus of A. communis sp. nov., Dzumac Mts (1) and A. shirleyae Samuelson, 1973, Pic du Pin (2). F. Metafemoral spring of A. communis sp. nov., Dzumac Mts. Abbreviations: ae = apical emargination with thickset spines; asp = apical spur of hind tibia; ba = basal angle of ventral lobe; dba = dorsal-basal angle of metafemoral spring; dl = dorsal lobe; dmv = dorsal margin of ventral lobe; ea = extended arm of dorsal lobe; fm = first metatarsomere; ht = hind tibia; pas = prosternal antecoxal space; pc = procoxal cavities posteriorly open (arrows); pip = prosternal intercoxal process; rf = recurve flange; sbe = spring basal edge; vl = ventral lobe.

Fig. 8. Median lobe of aedeagus in lateral (l), ventral (v) and dorsal (d) view. A–B. Arsipoda agalma Samuelson, 1973. A. Mt Paniè. B. Col d’Amieu. C. A. atra sp. nov., Aoupinié. D. A. communis sp. nov., Mt Do. E. A. doboszi sp. nov., Haute Rivière Bleue. F. A. elongata sp. nov., Mt Humboldt. G. A. evax Samuelson, 1973, Koghi Mts. H. A. geographica Gómez-Zurita, 2010, Haute Rivière Bleue. I. A. gressitti sp. nov., Farino.

Fig. 11. Female genitalia. A–S. Spermatheca. A. Arsipoda agalma Samuelson, 1973, N of Pic Vincent. B. A. atra sp. nov., Aoupinié. C. A. communis sp. nov., Dzumac Mts. D. A. doboszi sp. nov., Mt Do. E. A.elongata sp. nov., Mt Humboldt. F. A. evax Samuelson, 1973, Chagrin. G. A. geographica Gómez- Zurita, 2010, Mt Humboldt. H. A. gressitti sp. nov., Farino. I. A. isola Samuelson, 1973, Bois du Sud. J. A. longifrons sp. nov., Humboldt S track. K. A. paniensis sp. nov., Mt Panie. L. A. povilaensis sp. nov., Pic d’Amoa, Povila.M. A. rostrata Gómez-Zurita, 2010, Dzumac Road.N. A. rutai sp. nov.Dzumac Road. O. A. shirleyae Samuelson, 1973, Haute Rivière Bleue. P. A. transversa sp. nov., Mt Koghi. Q. A. wanati sp. nov., Mt Humboldt. R. A. yiambiae Samuelson, 1973, Yiambi. S. A. gomezzuritai sp. nov., Dzumac Mts. T. Tignum (t) and vaginal palpi (vp) of A. communis sp. nov., Mt Do. Abbreviations: a = appendix; ap = apical part; bp = basal part; c = collum or neck; d = ductus; LSPc = length of spermathecal capsule; SPc = spermathecal capsule = ap + c + bp.

Fig. 14. Distributions of New Caledonian Arsipoda. A. Arsipoda agalma Samuelson, 1973, A. evax Samuelson, 1973, A. geographica Gómez-Zurita, 2010, A. isola Samuelson, 1973 and A. rutai sp. nov. B. A. atra sp. nov., A. communis sp. nov., A. montana sp. nov., A. paniensis sp. nov. and A. rostrata Gómez-Zurita, 2010.

Fig. 2. Habitus. A. Arsipoda longifrons sp. nov, Humboldt S track. B. A. montana sp. nov, Mt Humboldt. C. A. paniensis sp. nov, Mt Panié. D. A. povilaensis sp. nov, Pic d’Amoa. E. A. punctata sp. nov., Mueo. F. A. rostrata Gómez-Zurita, 2010, Koghi Mts. G. A. rutai sp. nov, Poro Plateau. H. A. shirleyae Samuelson, 1973, S Humboldt. I. A. transversa sp. nov., Mt Koghi.

Fig. 9. Median lobe of aedeagus in lateral (l), ventral (v) and dorsal (d) view. A. Arsipoda isola Samuelson, 1973, Bois du Sud. B. A. longifrons sp. nov., Humboldt S track. C. A. montana sp. nov., Mt Humboldt. D. A. paniensis sp. nov., Mt Panié. E. A. povilaensis sp. nov., Pic d’Amoa, Povila. F. A. punctata sp. nov., Mueo. G. A. rostrata Gómez-Zurita, 2010, Koghi Mts. H. A. rutai sp. nov. Poro Plateau. I. A. shirleyae Samuelson, 1973, S Humboldt.

Fig. 10. Median lobe of aedeagus in lateral (l), ventral (v) and dorsal (d) view. A. Arsipoda transversa sp. nov., Mt Koghi. B. A. wanati sp. nov., Mt Humboldt. C. A. yiambiae Samuelson, 1973, Yiambi. D. A. gomezzuritai sp. nov., Dzumac Mts. E. Nomenclature. Abbreviations: amt = apical median tooth; apr = apical process; bp = basal part; dl = dorsal ligula; vs = ventral sulcus.