Stenosis helenae, Schawaller & Bigalk, 2021

Schawaller, Wolfgang & Bigalk, Sonia, 2021, Two new genera and six new species of Stenosini (Coleoptera: Tenebrionidae Pimeliinae) from Myanmar (Burma), collected by René Fouquè, Zootaxa 5068 (1), pp. 133-141 : 139

Stenosis helenae sp. nov.

( Figs 5 , 11 )

Type material: Holotype: Burma: ♂, Mandalay Region, Bagan , 21°09’N 94°53’E, 80 m, 10–14. & 22–24.X.2014, leg. R. Fouquè, NMPC . Paratypes: Same data as for the holotype, 77 exx. NMPC , 5 exx. SMNS. Burma, Mandalay Region, Bagan , 21°09’N 94°53’E, 80 m, 2–8. V .2016, leg. R. Fouquè , 73 exx. NMPC , 2 exx. SMNS.

Description. Body length 5.6–6.0 mm. Integument matt, blackish. Head long, length from cervical constriction to clypeus 1.3x as maximal width between genae, straight divergent from cervical constiction to eyes, genae slightly surpassing eyes and with shallow impression, anterior margin of clypeus straight, symmetrical, frons without medial keel or impression, surface with dense but not confluent punctures, each puncture with a light decumbent and acute seta. Eyes not prominent, completely in conture of head. Antennae 11-segmented, shape of antennomeres as in Fig. 5 , antennomere 2 1.0x as wide as long, antennomere 3 1.0x as wide as long. Pronotum long, narrow, 1.4x as long as wide, widest at anterior corners, sides straight convergent to base, posterior corners rectangular, anterior corners not protruding, disc with a feeble longitudinal impression, without keel, punctures and setation as on head; prothoracic hypomera with similar punctures as on disc and without setation. Elytra elongate-oval, widest in middle, 2.3x as long as wide, humeral corners distinctly protruding forward, punctures in elytral rows large and dense as on pronotum, intervals flat but becoming convex laterally and apically, not keel-like, acute decumbent setation longer than on head and pronotum, lateral margin of elytra visible from dorsal near humeral angles and apically; scutellar strioles short, impressed, each consisting of 2–3 punctures; epipleura with a row of large punctures along entire length. Ventrites with finer, sparser punctures than on pronotum, punctures with very short decumbent setation. Legs without peculiarities. Aedeagus as in Fig. 11 . apicale somewhat bent to lateral side and so slightly asymmetric.

Diagnosis. Stenosis helenae sp. nov. runs in the key of the Burmese Stenosis by Medvedev (1994) to S. remota Medvedev, 1994 , described based on a single specimen of unknown sex from northern Burma. Both can be separated by the different shape of the pronotum, which is shorter and wider (1.26x as long as wide) with rounded sides in S. remota , whereas in S. helenae sp. nov. the pronotum is longer and narrower (1.4x as long as wide) with straight convergent sides. The aedeagi cannot be compared because it is unknown in S. remota .

Etymology. Named after René Fouquè’s wife Helena.

Figures

FIGURES 1–6. Dorsal view of Stenosini from Myanmar (Burma). 1. Bamarosis gen. nov. fouquei sp. nov., holotype NMPC. 2. Shanosis gen. nov. renei sp. nov., holotype NMPC. 3. Gebieniella ellenae sp. nov., holotype NMPC. 4. Gebieniella matthiasi sp. nov., holotype NMPC. 5. Stenosis helenae sp. nov., holotype NMPC. 6. Stenosis mandalayca sp. nov., holotype NMPC. Scale line: 1 mm.

FIGURES 7–12. Aedeagus of Stenosini from Myanmar (Burma). 7. Bamarosis gen. nov. fouquei sp. nov., holotype NMPC. 8. Shanosis gen. nov. renei sp. nov., holotype NMPC. 9. Gebieniella ellenae sp. nov., holotype NMPC. 10. Gebieniella matthiasi sp. nov., holotype NMPC. 11. Stenosis helenae sp. nov., holotype NMPC. 12. Stenosis mandalayca sp. nov., holotype NMPC. Scale line: 0.5 mm.