Cissidium davaoense, Darby, 2020

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 34-35

publication ID	https://doi.org/ 10.5852/ejt.2020.622
publication LSID	lsid:zoobank.org:pub:9CD3B2CD-F072-4994-8CA9-24145D343401
DOI	https://doi.org/10.5281/zenodo.3795560
persistent identifier	https://treatment.plazi.org/id/A184CD9F-CE94-4F39-A310-9DF4DBE068B9
taxon LSID	lsid:zoobank.org:act:A184CD9F-CE94-4F39-A310-9DF4DBE068B9
treatment provided by	Valdenar
scientific name	Cissidium davaoense
status	sp. nov.

Treatment

Cissidium davaoense View in CoL sp. nov.

urn:lsid:zoobank.org:act:A184CD9F-CE94-4F39-A310-9DF4DBE068B9

Fig. 21 View Fig

Etymology

Named after the region in the Philippines where the specimen was found.

Material examined

Holotype

PHILIPPINES • ♂; Davao, Mindanao, E. slope of Mt McKinley ; 3500 ft a.s.l.; 15 Aug. 1946; flight dusk; F.G.Werner leg.; FM(HD) 46.10; FMNH.

Description

SIZE. Habitus ( Fig. 21A View Fig ), length 0.54 mm.

COLOUR. Dusky yellow.

HEAD. With a shallow median depression between the eyes, width across eyes 0.18 mm; antennomeres III–XI length 0.25 mm, III–IX 0.14 mm, X–XI length 0.11 mm; mentum as Fig. 4A. View Fig

PRONOTUM. Length 0.14 mm, width 0.21 mm, sparsely pubescent, with a row of ± nine foveae along the posterior margin, and ± three shallow foveae anterior to these; lateral margins bordered, rounded then almost straight to slightly obtuse hind angles, border not extending onto the posterior margin which has a sinuous emargination before the scutellum ( Fig. 21B View Fig ).

ELYTRA. Length 0.36 mm, width 0.27 mm, pubescent, foveolate in basal third.

MESOVENTRITE. Medial extension of collar onto mid-keel narrow, anterior margin with two semi-circular emarginations, posterior corners joining mesocoxae; mid-keel sharply raised medially before keel; keel with two setae, sharply pointed to termination almost reaching posterior margin of the mesocoxae; mesoventral lateral margins coarsely serrate in posterior half; humeri with small tooth ( Fig. 21C View Fig ).

METAVENTRITE. Length 0.12 mm, width across short triangular spines 0.06 mm; posterior margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus as Fig. 6 View Fig Fa–b. Females not known.

Remarks

One of the only two species of Cissidium in this group from the Philippines. Distinguished by the smaller pronotal foveae than those on C. advena sp. nov.