Macrolycus unicolor Y. Yang, Liu & X. Yang, 2023

Liu, Hao Yu, Du, Ruo Lan, Zhao, Wei, Yang, Xing Ke & Yang, Yu Xia, 2023, A morphometric approach to the comparative morphology of aedeagi shapes in net-winged beetles: A case study on the Macrolycus dotatus species group (Coleoptera: Lycidae), Arthropod Systematics & amp; Phylogeny 81, pp. 897-916 : 897

publication ID	https://dx.doi.org/10.3897/asp.81.e111281
publication LSID	lsid:zoobank.org:pub:39E0B43B-FFBD-46BF-BA86-F79314C7BE34
persistent identifier	https://treatment.plazi.org/id/18F1806E-B5A1-481F-B34A-C7FC9A68048B
taxon LSID	lsid:zoobank.org:act:18F1806E-B5A1-481F-B34A-C7FC9A68048B
treatment provided by	Arthropod Systematics & Phylogeny by Pensoft
scientific name	Macrolycus unicolor Y. Yang, Liu & X. Yang
status	sp. nov.

Treatment

Macrolycus unicolor Y. Yang, Liu & X. Yang sp. nov.

Figures 5E View Figure 5 , 6B View Figure 6 , 7F-H View Figure 7 , 8A, B View Figure 8

Type material.

Holotype: China • ♂ (IZAS); Yunnan, Tengchong; 20.V.2006; H.B. Liang leg.

Description.

Male (Fig. 6B View Figure 6 ). Length 8.2 mm, width at humeri 1.7 mm. - Body brown. Pronotum, elytra and scutellum orange. Surface covered with decumbent orange pubescence. - Head relatively small. Eyes small, interocular distance approximately twice as large as eye diameter. Antennae (Fig. 5E View Figure 5 ) flabellate, overlapping two-thirds the length of the elytra when inclined. Antennomere II transverse; III-XI lamellate, lamella of III 0.8 times as long as the joint itself, and lamella of VIII longest, 4.0 times longer than the joint itself. - Pronotum quadrate, 1.14 times wider than long, disc present with a median longitudinal keel extending from anterior margin to middle part. Anterior margin approximately straight, lateral margins subparallel and posterior margin bisinuate; anterior angles obtuse, posterior angles sharp and prominently projected. Scutellum trapezoidal, feebly emarginate at apex. - Elytra slender and subparallel, 3.2 times longer than humeral width. Each elytron with four costae, costa II stronger than the others; costa III visible only at basal part. - Aedeagus: median lobe slender, strongly curved near middle in lateral view, at an angle of ca. 120° between basal and apical parts of dorsal side, strongly arcuate at base part, subapical part strongly inflated dorsally (Figs 7H View Figure 7 , 8A View Figure 8 ); naerly straight at basal part in ventral view, subapical part strongly inflated laterally and asymmetrical (Figs 7F, G View Figure 7 ; 8B View Figure 8 ), with an oval ventral cavity (Fig. 7G View Figure 7 ); apical part parallel-sided (Fig. 7F, G View Figure 7 ), with a deep V-shaped notch at apex (Fig. 7G View Figure 7 ).

Female.

Unknown.

Diagnosis.

This new species resembles M. atronotatus in appearance but differs from the latter in the uniformly orange pronotum (Fig. 6B View Figure 6 ), with a black patch on the pronotum (Fig. 3A View Figure 3 ) in M. atronotatus . Additionally, it is similar to M. atronotatimimus sp. nov. in the lateral view of the median lobe (Fig. 8A View Figure 8 ) but differs from the latter in the ventral view (Fig. 8B View Figure 8 ), which is feebly curved at the basal part, at an angle of ca. 15° with the apical part, with the subapical part asymmetrically inflated (Fig. 7G View Figure 7 ). In comparison, the median lobe of M. atronotatimimus sp. nov. is moderately swollen and straight at the basal part in ventral view (Fig. 4K View Figure 4 ).