Cratna sp. 1

Nomura, Shûhei & Aung, Mu Mu, 2021, Inventory Studies on the Subfamily Pselaphinae (Coleoptera, Staphylinidae) of Myanmar Part 4: A List of Collected Species in Tanintharyi Region in February 2020, Bulletin of the National Museum of Nature and Science. Series A, Zoology 47 (2), pp. 107-116 : 112

9. Cratna sp. 1 * ( Figs. 3G , 4A, C, E )

Specimen examined. 1 ex., 14 SLL .

Remarks. The genus Cratna has been already known from Tanintharyi Region with two species, which are both lacking male sexual patch. In the present survey, additional two species of this genus both having large male sexual patch were discovered. This species (C. sp. 1) is characterized by the broad and trapezoidal posterior nodule in posteromedian part of the sexual patch on the abdominal tergite IV ( Figs. 4C, E ).

Figures

Fig. 3. Pselaphine species recognized in Tanintharyi Region in Feb. 2020.A. Bythinoplectina gen. sp. 6; B. Pseudoplectus? sp. 1; C. Tribasodites denticornis Nomura et Aung, 2020; D. T. sp. 3; E. T. sp. 4; F. Smetanabatrus alesi Nomura et Aung, 2020; G. Cratna sp. 1; H. C. sp. 2; I. Batriscenaulax sp. 1, male; J. ditto, female; K. Arthromelodes sp. 2, male; L. ditto, female; M. Batrisina gen. sp. 1; N. Tmesiphorus sp. 2; O. Raphitreodes dentimanus (Raffray, 1890); P. Saltisedes sp. 1; Q. Horniella sp. 1.

Fig. 4. SEM photos of Cratna species collected in Tanintharyi Region. A, C, E. Cratna sp. 1; B, D, F. C. sp. 2. A, B. head and pronotum in dorsal view; C, D, abdominal tergite IV in dorsal view; E, F. male sexual patch enlarged.