Arsipoda gressitti, 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 : 22-23

Arsipoda gressitti sp. nov.

urn:lsid:zoobank.org:act:75D53499-67B7-4382-A9CF-DB929FE5556C

Figs 1H , 8I , 11H , 15A

Diagnosis

Arsipoda gressitti sp. nov. is, along with A. geographica and A. shirleyae , one of the yellowish species lacking ventral morphological characters that allow a reliable identification. These species can be distinguished only by relying on the morphology of genitalia ( Figs 8 H–I, 9I, 11G–H, O).

Etymology

Male patronym. Named after Dr. J. Linsley Gressitt (1914–1982), who devoted his energies to the establishment, development and expansion of the Entomology Department of the Bishop Museum (Honolulu).

Type material

Holotype

NEW CALEDONIA: ♂, Plateau de Dogny [-21.60987 165.88907], Melaleuca savanna, 9 Apr. 1973, J.L. Gressitt leg. ( BPBM).

Paratypes

NEW CALEDONIA: 1 ♂, 3 ♀♀, same data as the holotype ( BPBM); 3 ♂♂, 1 ♀, ditto, 1000 m, 11 Apr. 1973, on Metrosideros operculata ( BPBM); 1 ♂, 1 ♀, ditto, on Pancheria aemula Schltr . ( BPBM); 2 ♂♂, 1 ♀, ditto, 1 Feb. 1963, C.M. Yoshimoto leg. ( BPBM); 2 ♂♂, 2 ♀♀, Farino, Parc des Grandes Fougères , N of Pic Vincent , -21.59929 165.77519, 670 m, track and forest, 17 Nov. 2008, M. Wanat leg.( MNHW);

Description of the holotype (♂)

Body moderately elongate, feebly convex; LB = 2.22 mm; maximum pronotal width at base (WP = 0.71 mm); maximum elytral width at apical third (WE = 0.98 mm). Dorsum yellowish, metallic, with irregular darkened spots on elytra. Frons and vertex microreticulate and punctate; head grooves weakly impressed, not continued to postantennal region; genae and frontal carina short; antennae slightly longer than ½ body length (LAN = 1.30 mm; LAN/LB = 0.59), basally yellow, gradually and slightly darker toward apex; LA: 100:67:67:54:75:75:92:87:92:92:125. Pronotum trapezoidal, distinctly transverse (LP = 0.45 mm; WP/LP = 1.58), laterally straight; anterior angles moderately prominent; antebasal transverse sulcus moderately impressed, slightly sinuate, with small lateral fovea; pronotal surface microreticulate, with small, dense punctures, distinctly impressed. Elytra moderately elongate (LE = 1.55 mm; WE/LE = 0.63), laterally moderately arcuate; punctuation clearly larger than on pronotum and clearly impressed; interstriae microreticulate. Legs yellowish; first pro- and mesotarsomeres weakly dilated; adhesive setae present on ventral side of first pro-, meso- and, partially, metatarsomeres. Venter light brown; last abdominal ventrite laterally incised, without special preapical impressions. Median lobe of aedeagus (LAED = 0.90 mm; LE/LAED = 1.71) ( Fig. 8I ) in ventral view fusiform, but narrower in preapical part; apex with median rounded tooth; ventral surface broadly concave at basal half; in lateral view, median lobe curved at basal third and in preapical part, thin especially at basal third, with straight apex; dorsal ligula from about half length to preapical part of median lobe of aedeagus, wide, tapered toward apex.

Biometry

Male (n = 10; mean and standard deviation; range): LE = 1.72 ± 0.13 mm (1.55 Ĺ LE Ĺ 1.94 mm); WE = 1.09 ± 0.09 mm (0.98 Ĺ WE Ĺ 1.24 mm); LP = 0.51 ± 0.04 mm (0.45 Ĺ LP Ĺ 0.56 mm); WP = 0.82 ± 0.07 mm (0.71 Ĺ WP Ĺ 0.92 mm); LAN = 1.46 ± 0.10 mm (1.36 Ĺ LAN Ĺ 1.60 mm); LAED = 0.99 ±

0.05 mm (0.90 Ĺ LAED Ĺ 1.06 mm); LB = 2.30 ± 0.10 mm (2.13 Ĺ LB Ĺ 2.40 mm); LE/LP = 3.39 ± 0.06 (3.32 Ĺ LE/LP Ĺ 3.49); WE/WP = 1.33 ± 0.03 (1.29 Ĺ WE/WP Ĺ 1.37); WP/LP = 1.61 ± 0.02 (1.58 Ĺ WP/ LP Ĺ 1.64); WE/LE = 0.63 ± 0.01 (0.61 Ĺ WE/LE Ĺ 0.65); LAN/LB = 0.63 ± 0.02 (0.59 Ĺ LAN/LB Ĺ 0.67); LE/LAED = 1.73 ± 0.06 (1.65 Ĺ LE/LAED Ĺ 1.85).

Female (n = 8; mean and standard deviation; range): LE = 1.90 ± 0.08 mm (1.80 Ĺ LE Ĺ 2.04 mm); WE = 1.19 ± 0.04 mm (1.14 Ĺ WE Ĺ 1.25 mm); LP = 0.54 ± 0.03 mm (0.52 Ĺ LP Ĺ 0.58 mm); WP = 0.89 ± 0.04 mm (0.82 Ĺ WP Ĺ 0.94 mm); LAN = 1.38 ± 0.05 mm (1.30 Ĺ LAN Ĺ 1.44 mm); LSPc = 0.19 ± 0.01 mm (0.17 Ĺ LSPc Ĺ 0.20 mm); LB = 2.51 ± 0.10 mm (2.35 Ĺ LB Ĺ 2.63 mm); LE/LP = 3.53 ± 0.07 (3.41 Ĺ LE/LP Ĺ 3.62); WE/WP = 1.35 ± 0.04 (1.30 Ĺ WE/WP Ĺ 1.41); WP/LP = 1.64 ± 0.05 (1.58 Ĺ WP/ LP Ĺ 1.73); WE/LE = 0.63 ± 0.02 (0.61 Ĺ WE/LE Ĺ 0.66); LAN/LB = 0.55 ± 0.01 (0.52 Ĺ LAN/LB Ĺ 0.57); LE/LSPc = 10.12 ± 0.91 (9.51 Ĺ LE/LSPc Ĺ 12.14).

Paratypes very similar in shape, sculpture and color to the holotype. Antennae distinctly shorter in female. Spermatheca ( Fig. 11H ) with globose, slightly elongate basal part, elongate collum, and short apical part; ductus thin, short, apically inserted.

Distribution

Central Grande Terre ( Fig. 15A ).

Ecological notes

Collected in forest and along track between 670 and 1000 m a.s.l. Found on Pancheria aemula (Cunoniaceae) and Metrosideros operculata (Myrtaceae) .

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. 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. 15. Distributions of New Caledonian Arsipoda. A. Arsipoda elongata sp. nov., A. gressitti sp. nov., A. longifrons sp. nov., A. shirleyae Samuelson, 1973, A. transversa sp. nov. and A. yiambiae Samuelson, 1973. B. A. doboszi sp. nov., A. povilaensis sp. nov., A. punctata sp. nov., A. wanati sp. nov. and A. gomezzuritai sp. nov.