New Ptiliidae (Coleoptera) from Sarawak in the spirit collection of the Natural History Museum, London Author Darby, Michael Department of Life Sciences, Natural History Museum, London, SW 7 5 BD UK. m.darby@nhm.ac.uk text European Journal of Taxonomy 2019 2019-04-04 512 1 50 journal article 27392 10.5852/ejt.2019.512 85c6241d-5e5a-4022-945f-e207d31458ef 2118-9773 2628794 urn:lsid:zoobank.org:pub:8DF89CFD-A549-4C69-8FBC-90EC8DEA9A66 Niptella gutta gen. et sp. nov. urn:lsid:zoobank.org:act: B6E16C2B-3B88-418C-9536-6E235936248C Fig. 12 Diagnosis Determined by the form of the mesoventral keel. Etymology From the Latin ‘ gutta ’, meaning ‘drop’, and referring to the shape of the mesoventral keel. Type material Holotype MALAYSIA-BORNEO • ♀ ; Sarawak , 4 th division, Gunung Mulu National Park ; 1930 m a.s.l. ; May– Aug. 1978 ; P.M. Hammond and J.E. Marshall leg., BM 1978-49 ; BMNH . Paratypes MALAYSIA-BORNEO • ♂ ; same data as for holotype; BMNH • 2 specs ; same data as for preceding; 1800-1900 m a.s.l. ; litter; BMNH • 1 spec. (mounted disarticulated on the slide); Sarawak , 4 th division, Gunung Mulu National Park ; May–Aug. 1978 ; P.M. Hammond and J.E. Marshall leg., BM 1978-49 ; litter below comp. 4; BMNH • 1 spec. ; Sarawak , Mulu ; 13 Mar. 1978 ; N.M. Collins leg.; pitfalls in alluvial forest; BMNH . Description SIZE. Habitus ( Fig. 12A ), length 0.65 mm . COLOUR. Yellowish brown shining, closely covered with fine pale pubescence. HEAD. With row of postulate setae behind the eyes ( Fig. 12F ). Antennae very pale yellow almost translucent, antennomeres III–XI, length 0.28 mm . Eyes prominent, distance across eyes 0.24 mm . Mentum and submentum ( Fig. 12D ). PRONOTUM. Length 0.19 mm , width 0.30 mm ( Fig. 12F ). Fig. 12. Niptella gutta gen. et sp. nov. A . Habitus. B . Spermatheca. C . Aedeagus. D . Mentum and submentum ×860. E . Pygidium. F . Pronotum ×540. G . Meso- and metaventra ×470. H . Mesoventral keel ×1060. ELYTRA. Length 0.39 mm , width 0.35 mm . truncate. VENTRUM. Proventrum wide before contiguous procoxae, reticulate, with scattered setae. Mesoventrum ( Fig. 12G ), collar not extending onto sharply toothed humeri, keel in shape of a peardrop stopping short of collar and narrowing to a point between the mesocoxae ( Fig. 12H ). Metaventrum ( Fig. 12G ), metacoxae separated by half the width of the sclerite. ABDOMEN. Pygidium ( Fig. 12E ). FEMALE GENITALIA. Spermatheca globular, very small and difficult to detect ( Fig. 12B ). MALE GENITALIA. Aedeagus large ( Fig. 12G ).