Cissidium globulum, 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 : 13-14

publication ID	https://doi.org/ 10.5852/ejt.2019.512
publication LSID	urn:lsid:zoobank.org:pub:8DF89CFD-A549-4C69-8FBC-90EC8DEA9A66
DOI	https://doi.org/10.5281/zenodo.5941274
persistent identifier	https://treatment.plazi.org/id/39B85FCC-5554-497A-A152-6935FD0C75E2
taxon LSID	lsid:zoobank.org:act:39B85FCC-5554-497A-A152-6935FD0C75E2
treatment provided by	Plazi
scientific name	Cissidium globulum
status	sp. nov.

Treatment

Cissidium globulum View in CoL sp. nov.

urn:lsid:zoobank.org:act:39B85FCC-5554-497A-A152-6935FD0C75E2

Figs 6C View Fig , 7A View Fig , 8A View Fig , 9A View Fig

Diagnosis

Identified by the globular appearance of the elytra and the shining dorsal surface frequently lacking pubescence. Might be confused with C. marshallae sp. nov. but that is a little smaller and more coarsely foveolate species.

Etymology

Refers to the rounded appearance of the elytra.

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 ; alluvial forest litter near laboratory; BMNH.

Paratypes

MALAYSIA-BORNEO • 1 spec.; same data as for holotype; BMNH • 1 spec.; Sarawak, Gunung Mulu National Park ; 200 m a.s.l.; 1978; N.M.Collins leg.; limestone forest pitfalls; BMNH • 3 specs (2 missing one elytron); Sarawak, 4 th division, Gunung Mulu National Park ; May–Aug. 1978; P. M. Hammond and J.E. Marshall leg., BM 1978-49 ; limestone forest litter; BMNH • 2 specs; Sarawak, Mulu ; 200 m a.s.l.; 1978; N.M. Collins leg.; limestone forest, pitfalls; BMNH • 1 spec.; Sarawak, 4 th division, Gunung Mulu National Park ; May–Aug. 1978; P. M. Hammond and J.E. Marshall leg., BM 1978-49 ; base litter on hill[?]; BMNH • 1 spec.; 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 .

Description

SIZE. Habitus ( Fig. 6C View Fig ), length 0.61 mm.

COLOUR. Pronotum and head almost black, elytra dark brown, shining, pubescence, antennae and legs yellow.

HEAD. With a row of indistinctly formed foveolae on a level with the top of the eyes, antennomeres III–XI, length 0.25 mm, mentum and submentum with ± circular foveolae (not always clearly defined), wider anteriorly than posteriorly, anterior border rounded as Fig. 9C. View Fig

PRONOTUM. Length 0.19 mm, width 0.29 mm, foveolate throughout, two short carina at the base appearing only faintly or as a fusion of foveolae in some specimens, side margins angled medially, pubescence long, overlapping (but frequently abraded) ( Fig. 7A View Fig ).

ELYTRA. Length 0.43 mm, width 0.40 mm, smooth, evenly rounded, broadest at middle, pubescence long, overlapping (frequently very abraded).

VENTRUM. Mesoventrum without pubescence, sharply angled at humeri, lateral margins with ± two serrations only, keel parallel sided, narrow parallel sided between mesocoxae ( Fig. 8A View Fig ). Metaventrum with scattered pubescence, metacoxae separated by ¼ width of the sclerite.

Remarks

The pronotal sculpture is sometimes difficult to make out, side lighting is helpful.