Nossidium katyae, Darby, Michael, 2015

Darby, Michael, 2015, Nossidium katyae, a new species of Bolivian Ptiliidae (Coleoptera), described and figured, Zootaxa 4048 (3), pp. 436-440 : 438-439

Nossidium katyae sp. n.

(Figs. 1–13)

Habitus Figs. 1–3. Length from front of retracted head to elytral apex 1.04 mm. Colour brown, pubescence pale yellow, legs and antennae dusky yellow. Antennomeres 3–11 0.43 mm long, Fig. 4. Mentum and submentum chaetotaxy Fig. 10. Width across eyes 0.36 mm. Pronotum 0.27 mm long, 0.67 mm wide. Elytra 0.71 mm long, 0.63 mm wide, single detached elytron laid flat 0.74 mm long, 0.44 mm wide. Scutellum Fig. 8. Wing, length without fringe 1.60 mm, width without fringe 0.31 mm Fig. 5. Proventrum between procoxae Fig. 13. Mesoventrum showing mesoventral collar and keel, and metaventrum showing line behind meso-metaventral suture Fig. 7. Metacoxal plates Fig. 12. Bifurcate extension of metaventrum between metacoxae Fig. 9. Pygidium showing teeth Fig. 11.

FIGURES. 7–13 Nossidium katyae sp. n.. 7. mesosternum x450; 8. scutellum. 9. bifurcate process of metaventrum between matacoxal plates x2500; 10. mentum and submentum showing chaetotaxy x910. 11. pygidium showing teeth x1960. 12. metacoxal plates x450. 13. proventrum between procoxal insertions x1200.

Male. Not known.

Female. Spermatheca Fig. 6.

Etymology. I am pleased to name the species after Miss Katy Sexton in celebration of her 21st birthday.

Type data. Holotype: f#, Bolivia, Santa Cruz dept., W. Amboro National Park, GPS 37, S. 18° 06' 06" E. 63° 48' 08", Barientos, 1813m, 29.xi.2013, sifting leaf litter, Winkler app. extr., P. Baňař lgt. ( UASC); mounted as a slide on acrylic sheet and pinned with the data labels. Because the slide does not permit examination of the dry mounted specimen as is usual for a beetle holotype it is proposed that the illustrations attached to this article form part of the designation.

Remarks. Immediately separable from pilosellum in being less parallel with more posteriorly tapering elytra, the form of the mentum which is wider anteriorly and less parallel sided, the shape of the metaventral lines which reach the anterior margins and do not turn rearwards, the form of the spermatheca which is more globose, without patterning, and the greater number of teeth on the posterior margin of the pygidium.

Acknowledgements. I am grateful to Dr Petr Baňař for allowing me to study this material, to my colleagues Max Barclay and Dr Roger Booth for their help and support, and to Dr Al Newton who made important corrections and improvements to the manuscript.

FIGURES. 14–18 Nossidium pilosellum Marsham. 14. habitus ventral; 15. habitus dorsal; 16. habitus side; 17. mentum and submentum x745; 18. mesoventrum x495; 19. proventrum between procoxal cavities x785.