Cissidium deanei, 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 : 35-36

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.3795558
persistent identifier	https://treatment.plazi.org/id/0CC5DA87-ED16-4002-87ED-EE22765CB812
taxon LSID	lsid:zoobank.org:act:0CC5DA87-ED16-4002-87ED-EE22765CB812
treatment provided by	Valdenar
scientific name	Cissidium deanei
status	sp. nov.

Treatment

Cissidium deanei View in CoL sp. nov.

urn:lsid:zoobank.org:act:0CC5DA87-ED16-4002-87ED-EE22765CB812

Fig. 22 View Fig

Etymology

Johnson ms name, named after Cedric Deane, who was the author of three important papers on the Australian ptiliid fauna

Material examined

Holotype

AUSTRALIA • ♂; S.W., Warren National Park , Pemberton; 1970; H. Franz leg.; MMUE.

Description

SIZE. Habitus ( Fig. 22A View Fig ), length 0.65 mm.

COLOUR. Dusky yellow, pubescence, legs and antennae slightly paler.

HEAD. Without an obvious depression behind the eyes, width across eyes 0.19 mm; antennomeres III–XI length 0.33 mm, III–IX length 0.20 mm, X–XI length 0.13 mm; mentum obscured.

PRONOTUM. Length 0.17 mm, width 0.25 mm, sparsely pubescent, with two pairs of foveae at the base and ± three less deeply impressed foveae anterior to these; lateral margins bordered, rounded then almost straight to acute hind angles, border not extending onto the posterior margin which has a sinuous emargination before the scutellum ( Fig. 22B View Fig ).

ELYTRA. Length 0.43 mm, width 0.36 mm, pubescent, setae same length as pronotum, foveolate in basal third.

MESOVENTRITE. Medial extension of collar broad; mid-keel anterior margins effaced, posterior corners with wide carinae to mesocoxal anterior borders, mid-keel sharply raised medially before keel; keel with ± six setae, parallel-sided to termination almost reaching posterior margin of mesocoxae; mesoventral lateral margins not serrate in posterior half; humeri with small tooth ( Fig. 22C View Fig ).

METAVENTRITE. Length 0.14 mm, disc simple, width across spines 0.08 mm; posterior margins of mesocoxal cavities not serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus as Fig. 6G View Fig . Females not known.

Remarks

The five species of Cissidium from Australia all belong in this group and with the exception of C. delicatum sp. nov. are difficult to separate on dorsal characteristics. The short median extension of the mesoventral collar coupled with the parallel sided mid-keel distinguishes this species from the remainder.