Cissidium advena, 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 : 21-23

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.3795512
persistent identifier	https://treatment.plazi.org/id/3DB446BE-D563-4B2E-82DE-26F856A8AFD2
taxon LSID	lsid:zoobank.org:act:3DB446BE-D563-4B2E-82DE-26F856A8AFD2
treatment provided by	Valdenar
scientific name	Cissidium advena
status	sp. nov.

Treatment

Cissidium advena View in CoL sp. nov.

urn:lsid:zoobank.org:act:3DB446BE-D563-4B2E-82DE-26F856A8AFD2

Fig. 13 View Fig

Etymology

Johnson ms name. Presumed to be from the Latin ‘ advena ’, meaning ‘a stranger’. Noun in apposition.

Material examined

Holotype

PHILIPPINES • ♂; Mindanao , Todaya, E slope of Mt Apo, Davida Prov.; 16 Jun. 1946; 2800 ft a.s.l.; in decaying leaf fragments under young bamboo petioles; F. Werner leg.; FM( HD) # 46.43; mounted as a disarticulated slide; FMNH.

Description

SIZE. Habitus ( Fig. 13A View Fig ), length 0.76 mm.

COLOUR. Yellow brown, pubescence, legs and antennae yellow. HEAD. With a clearly marked linear depression and short median longitudinal depression between the eyes, width across eyes 0.23 mm; antennomeres III–XI length 0.34 mm, III–IX length 0.19 mm, X–XI length 0.15 mm; mentum as Fig. 4A. View Fig

PRONOTUM. Length 0.21 mm, width 0.28 mm, sparsely pubescent mostly confined to anterior corners, with row of eight basal foveae, the median four tending to form two large ones; side margins rounded, slightly concave before rectangular hind angles, border not extending onto posterior margin, emargination before scutellum sinuate ( Fig. 13B View Fig ).

ELYTRA. Length 0.42 mm, width 0.42 mm, sparsely pubescent without foveolae.

MESOVENTRITE. Medial extension of collar short, broad; mid-keel tapering from anterior corners to posterior margin with carinae at the corners reaching to the mesocoxal anterior borders, medially with a sharply defined longitudinal ridge rising to a blunt point before the keel; keel parallel-sided to rounded termination past mid-point of the mesocoxae; mesoventral lateral margins serrate posteriorly ( Fig.13C View Fig ).

METAVENTRITE. Length 0.12 mm, width across spines 0.08 mm, with scattered setae near margins, disc depressed; mesoventral posterior margins serrate.

WINGS. Macropterous.

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

Remarks

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