Two new Oriental species of Eumorphus Weber (Coleoptera, Endomychidae)

Abstract Two new species of Eumorphus from Asia, E. falcifasciatus sp. n. and E. qiujianyuei sp. n. are described and illustrated.


Introduction
The genus Eumorphus was established by Weber (1801) with Eumorphus sumatrae Weber, 1801 (= Erotylus quadriguttatus Illiger, 1800) as the type species. This genus is classified in the largest subfamily of Endomychidae, Lycoperdininae, the monophyly of which was tested and confirmed by the phylogenetic studies of Tomaszewska (2000,2005). Robertson et al. (2015) presented a large-scale phylogenetic study for the Cucujoidea, using molecular evidence to rebuild the relationship tree of this superfamily and established one new superfamily, Coccinelloidea, with Endomychidae placed within it. This study further confirmed the monophyly of the subfamily Lycoperdininae and established its sister relationship with the subfamily Epipocinae (Robertson et al. 2015). Tomaszewska (2005) recognized five generic groups among 38 genera of Lycoperdininae known at that time. The 23 genera known then from the Oriental Region have been classified in four of five generic groups (Lycoperdina-, Amphix-, Amphisternus-and Eumorphus-groups). Since then two new genera of Lycoperdininae have been described from the Oriental Region: Stroheckeria Tomaszewska, 2006 andHumerus Chang &Ren, 2013. Both, indicated by the authors as belonging to Amphisternus-group (Tomaszewska 2006, Chang andRen 2013), sister group of Eumorphus-group which includs the genus Eumorphus Tomaszewska (2005).
In 2007, Ren and Wang described two new species of Eumorphus, E. dentatus and E. letilimarginatus from China. Eumorphus is the largest genus of the subfamily Lycoperdininae and prior to the present study, this genus included 76 species (including subspecies) (Shockley et al. 2009).
During the examination of Endomychidae collected in China and Borneo, two new species were recognized and are described here.

Materiasl and methods
Type specimens of the new species described here are deposited in the following institutions or private collections: MHBU Museum of Heibei University, Baoding, China CCLX Collection of Lingxiao Chang, Beijing, China The specimens were examined and described using a Nikon ® SMZ800 dissecting microscope. The following measurements were made using a Leica ® M205 A dissecting microscope: body length from apical margin of clypeus to apex of elytra; width across both elytra (at widest part); elytral length along suture, including scutellum. The abdomen was boiled in 10% NaOH solution, cleaned, and finally aedeagus was dissected in distilled water. Habitus photos were taken using a Canon ® Eos 5D III SLR camera and Canon ® MP-E 65mm macro lens. All photographs were modified in Adobe Photoshop ® CC 2015. Diagnosis. Eumorphus falcifasciatus is a very unique species by its colouration, differing from all others in having the anterior elytral maculae falciform and posterior maculae dentate.
Description. Length 16.1 mm. Body pyriform, approximately 1.9 times as long as wide; moderately convex; subopaque. Colour black brown with two yellow maculae on elytra.
Etymology. The name refers to the anterior elytral macula falciform. Diagnosis. Eumorphus qiujianyuei is similar to Eumorphus austerus austerus in appearance, but can be differentiated based on the following combination of characters: posterior angles of pronotum strongly and acutely produced, with tips curved inwardly (in E. austerus austerus posterior angles of pronotum weakly produced); sides of pronotum undulate (in E. austerus austerus rather smooth); and mesotibiae gently curved distally from near 1/2 length (in E. austerus austerus abruptly and strongly curved distally from near 1/2 length).
Abdomen with five ventrites. Ventrite 5 with lateral margins strongly converging posteriorly, posterior margin deeply, narrowly emarginate medially. Aedeagus (Fig. 4) rather long, heavily sclerotized, weakly curved basally, abruptly widened from basal 1/3 to apex. Median lobe branched apically; the long branch abruptly raised at basal 1/3, strongly reflexed apically. Tegmen basal, comparatively large, ring-shaped. Etymology. This new species is dedicated to Ms. Jian-Yue Qiu, an insect researcher from Chongqing, who has been working on classification of insects for many years, collecting and providing many specimens of Endomychidae used in our studies. Strohecker HF (1979)