Nanomela Leschen, Reid, and Nadein 2020
- Dataset
- Generic Review of New Zealand Chrysomelinae (Coleoptera: Chrysomelidae)
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Coleoptera
- family
- Chrysomelidae
- genus
- Nanomela
description
(Figs 10 A, B, E, 12 A, 14 A-C, 15 B, C, 16 A, C, E)
description
Description. Length 1.30 – 1.55 mm. Body widely-elliptic to somewhat narrowed, slightly dorsoventrally flattened (greatest depth 0.60 – 0.80 mm); entirely reddish-brown. Vertex very wide, feebly convex, inner margin of eye without a small seta. Head relatively long and narrow. Eyes very small, round, consisting of 1 large ommatidium. Frons large and elongate-trapezoidal, nearly as long as wide, anterior margin straight. Antennae with antennomere 8 smaller than 7 th (ratio of antennomere lengths variable but generally: 0.6 / 0.3 / 0.3 / 0.3 / 0.3 / 0.2 / 0.3 / 0.3 / 0.4 / 0.5 / 0.8), distance between insertion and margin of eye is equal to diameter of insertion. Pronotum transverse (1.50 – 1.80 x wider than long), posterior margin of pronotum evenly rounded. Elytra elongate (2.87 – 3.33 x longer than pronotal length) and narrow (1.36 – 1.64 x the greatest elytral width); punctation striate, punctures arranged in 7 striae, epipleura narrow to moderately wide, flat, weakly inclined, feebly visible in lateral view. Spermatheca with rather short and thick collum and nodulus, strongly curved, collum with obtuse apex, duct comparatively long. Median lobe of aedeagus in ventral view straight, basal opening narrower than apical opening, the lobe gradually narrowed from apex to base, apical fourth widened, apex subrounded, median lobe inside with long, straight, and thin flagellum that curved in basal third.
diagnosis
Diagnosis. Head relatively long and narrow. Eye consisting of a one to two ommatidia. Antennae with antennomere 8 smaller than 7 th, distance between antennal socket and margin of eye is equal to diameter of socket. Posterior margin of the pronotum evenly rounded. Elytra with 7 distinct, but weakly impressed striae. Aedeagus with median lobe subrounded to weakly arrow-shaped.
discussion
Comments. These species differ from Nanomela tiniheke by the head which is longer and narrower, with an elongated frons, the eyes smaller with fewer facets, the pronotal posterior margin evenly rounded, the elytral apices wider and not elongate, and the spermatheca with an obtuse collum and long duct.
distribution
Distribution. South Island and Stewart Island.