Two new species of the genus Uenoites Belousov et Kabak, 2016 from mountains of Myanmar (Coleoptera: Carabidae: Trechini)

Abstract

Two new species of ground beetles of the genus Uenoites Belousov et Kabak, 2016 (tribe Trechini) are described from mountains of northern Myanmar: U. reuteri sp. n., and U. tibialis sp. n.. There are the first members of the genus found outside Yunnan Province of China. The taxonomic position of the new species within the genus is discussed based on the relevant character states in external and genital morphology. Both newly described species are closely related to each other and seem to form a distinct species-group within extremely diverse genus Uenoites. Externally, the newly described species are much more similar to very large members of the genus Queinnectrechus Deuve, 1992, than to most Uenoites but differs in an increased number of elytral setiferous pores in stria 3 and in the presence of the preapical pore.

Yalongaphaenops erwini gen. et sp. nov., the world’s most high-altitude hypogean trechine beetle from China (Coleoptera, Carabidae, Trechinae)

“…Additionally, the shape of the tooth on the right mandible is worth noting: it is tridentate, but without isolated premolar, of triangular shape with basal denticle much longer than others. Such subtriangular shape is unusual for Chinese Trechini and, to some extent, resembles teeth of some species of the Caucasian genus Cimmerites Jeannel, 1928 but in the latter case, the distal denticle is completely reduced ( Belousov 1998 ).…”

“…It was quite unexpected to find a highly specialized hypogean semi-aphaenopsoid species at an elevation exceeding 3800 m. Usually hypogean species are much more common at lower elevations, for example, the sweet spot of their biodiversity in the Caucasus is confined between 700 and 1300 m ( Belousov 1998 ). Much more seldomly, some hypogean species can be found there at lower or higher elevations.…”

“…Much more seldomly, some hypogean species can be found there at lower or higher elevations. In the latter case, there are some taxa known so far exclusively from high elevations: the genus Taniatrechus Belousov & Dolzhanski, 1994 (entrances to the caves populated by this species are located clearly above treeline), Meganophthalmus kravetzi Komarov, 1993, Nannotrechus ( Abasorites ) gracilipes Belousov, 1998 and eastern species of the subgenus Archinannotrechus Belousov, 1998 of the genus Nannotrechus Winkler, 1926; all these taxa were found either in the upper forest belt not far from the treeline or even slightly above ( Belousov 1998 ). Likewise, in China, the highest biodiversity of hypogean Trechini is recorded for lower mountains of southern China (e.g., Tian et al 2016 ).…”

Skeleton-and-Trackball Interactive Rotation Specification for 3D Scenes

“…where MV s and MV t are the 3×3 OpenGL rotation matrices (ignoring, thus, translation and scaling) corresponding to the pose of the shape in the source and the target, respectively; T r is the matrix trace operator; and T denotes matrix transposition. The value α ∈ [0, 180] is the smallest rotation (around any axis) needed to obtain the target pose from the source pose [3]. Note that Eq.…”

<em>Epaphius bartolozzii</em> n. sp. from Vietnam

“…Some of these, collected in caves, are specialized for subterranean life: Lanxangaphaenops louisi louisi Deuve, 2012, L. louisi annamensis Deuve, 2012, Tonkinaphaenops marinae Deuve, 2013, T. anthonyi Faille & Tian, 2019, T. impunctatus Faille & Huang, 2019. Among the edaphic species, we can find: Agonotrechus amplicollis Ueno, 1999, A. campanulatus Ueno, 1999, A. nomurai Ueno, 1999, A. tonkinensis Jedlicka, 1939, A. vina Ueno, 1999, Paratrechiotes ocydromoides Ueno, 1995, Trechiotes luticola Ueno, 1995, T. perroti (Jeannel, 1954, T. tonkinicus Deuve, 2005, Trechus vietnamicus Ueno, 1995, Vietotrechus minutissimus Ueno, 1995 and Epaphiopsis hiekei Belousov & Kabak, 2016(Belousov & Kabak, 2016Anichtchenko, 2021).…”