Arsipoda gressitti, Samuelson & Biondi, 2016

Arsipoda gressitti sp. nov.

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

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 View Fig 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). GoogleMaps

Paratypes GoogleMaps

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); GoogleMaps

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 View Fig ) 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 View Fig ) with globose, slightly elongate basal part, elongate collum, and short apical part; ductus thin, short, apically inserted.

Distribution

Central Grande Terre ( Fig. 15A View Fig ).

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) .