Cissidium reitteri ( Matthews, 1889 )

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 160-161

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.3795688
persistent identifier	https://treatment.plazi.org/id/039987A1-388D-FF6E-2B0C-FEE4FF6AFE44
treatment provided by	Valdenar
scientific name	Cissidium reitteri ( Matthews, 1889 )
status

Treatment

Cissidium reitteri ( Matthews, 1889) View in CoL

Fig. 101 View Fig

Material examined

Holotype

BRAZIL • ♀; 1146; Matthews coll. 1904-120; BMNH.

The specimen bears an orange label in Matthews’ hand Dimorphella Reitteri and has been remounted. Matthews original mount is preserved on the pin.

Additional material

Fragments mounted as a slide labelled Dimorphella , “ all parts, 1886 ”, and on an orange label “ Reitterella ”, apparently in Matthews’ hand, are in the BMNH Matthews coll.1904-120. Only 2 legs and a globular spermatheca are possible to make out.

BRAZIL • Bom Jesus ; 28°40′ S, 50°12′ W, 1200 m a.s.l.; Dec. 1962; F. Plaumann leg.; C. Johnson det.; MMUE GoogleMaps .

There are also a further 14 specimens of this species in the MMUE and BMNH.

Supplementary description

The following description amplifies the type description of Matthews (1889, as Dimorphella , synonymy established by Johnson 1982), by adding more details of the meso- and metaventral characters, in order to conform with the entries in the present paper.

SIZE. Habitus ( Fig. 101A View Fig ), length 0.63 mm.

COLOUR. Yellow brown, antennae, legs and pubescence yellow.

HEAD. With a well-marked linear depression behind the eyes, width across eyes 0.19 mm; antennomeres III–XI length 0.42 mm, III–IX length 0.29 mm, X–XI length 0.13 mm; mentum as Fig. 4B. View Fig

PRONOTUM. Length 0.19 mm, width 0.27 mm, pubescent, without foveae and foveolae; lateral margins sharply angled in posterior half, thence concave to acute hind angles and shallowly rounded to obtuse front angles, lateral margins bordered, the border not continued along the posterior margin, emargination opposite the scutellum sinuate ( Fig. 101B View Fig ).

ELYTRA. Length 0.40 mm, width 0.35 mm pubescence slightly denser than pronotum and foveolae more marked.

MESOVENTRITE. Medial extension of collar broad, short, flanked by two smaller pointed extensions, collar reticulation missing at their base; mid-keel wide basally becoming parallel-sided before strongly sculpted raised medial extension to keel, posterior corners with narrow carinae to mesocoxal borders; keel narrow, slightly tapering to between the mesocoxae; mesoventral lateral margins convex behind humeri then almost straight to rectangular angle before mesocoxae, without serrations; humeri strongly toothed ( Fig. 101C View Fig ).

METAVENTRITE. Sparsely pubescent, disc simple, length 0.16 mm width between spines 0.12 mm; margins of mesocoxal borders serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Male aedeagus as Fig. 6 View Fig Fa–b.

Remarks

One of the five Brazilian species in this group. Only likely to be confused with C. bomjesus sp. nov. but distinguished from that species by the more angulate pronotal sides and the broader and shorter midkeel.