Acrotrichis globosa, Darby, Michael, 2019

Darby, Michael, 2019, New Ptiliidae (Coleoptera) from Sarawak in the spirit collection of the Natural History Museum, London, European Journal of Taxonomy 512, pp. 1-50 : 39-40

Acrotrichis globosa sp. nov.

urn:lsid:zoobank.org:act:87156BD9-1A60-4E21-84F4-4A96D82E9FA2

Fig. 19

Diagnosis

The rounded body form, possession of elytra with wide epipleura and a medial foveola in the mesoventral collar distinguish this species.

Etymology

Refers to the globular form of the species.

Type material

Holotype MALAYSIA-BORNEO • ♀; Sarawak, 4 th Division, Gunung Mulu National Park ; May–Aug. 1978; P.M. Hammond and J.E. Marshall leg., BM 1978-49 ; comp 5, alluvial forest litter; BMNH.

Paratypes MALAYSIA-BORNEO • 1 ♂, 1 ♀; same data as for holotype; BMNH • 1 ♀, same data as for holotype; comp 1, litter near stream; BMNH .

Description

SIZE. Habitus ( Fig. 19A ), length 0.82 mm.

COLOUR. Yellowish brown, antennae and legs pale yellow, dorsal surface densely covered with short yellow pubescence.

HEAD. Distance across eyes 0.38 mm; antennomeres III–XI, length 0.34 mm; mentum and submentum chaetotaxy ( Fig. 19G ).

PRONOTUM. Length 0.29 mm, width 0.63 mm, hind angles right angled (viewed from 45°) ( Fig. 19B ).

ELYTRA. Length 0.48 mm, width 0.62 mm, widest across humeri, with wide epipleura in basal half ( Fig. 19F ).

VENTRUM. Mesoventrum reticulate with scattered pubescence at lateral margins which are shallowly concave, collar with a small medial fovea, keel obliterated anteriorly before collar, posteriorly narrowing to a point between the mesocoxae ( Fig. 19F ). Metaventrum reticulate, pubescent, posterior margin between metacoxae wide, with two sharp points at corners, metacoxae separated by ± ¹∕₅ the width of the sclerite.

FEMALE GENITALIA. Spermatheca ( Fig. 19D ).

MALE GENITALIA. Aedeagus ( Fig. 19E ).

Figures

Fig. 19. Acrotrichis globosa sp. nov. A. Habitus. B. Hind angle of pronotum viewed at 45°. C. Antennomeres III–XI. D. Spermatheca. E. Aedeagus. F. Meso- and metaventra ×280. G. Mentum and submentum ×800. H. Pygidium.