Cissidium steeli, 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 : 126-127

Cissidium steeli sp. nov.

urn:lsid:zoobank.org:act:86C4969A-78B4-4DD6-A2BB-443588CDFCD0

Fig. 80

Etymology

Johnson ms name, after W. Steel, the well-known UK Coleopterist.

Material examined

Holotype

TRINIDAD • ♀; Tamana; leaf litter; Aug. 1969; J. Darlington leg.; MMUE.

Description

SIZE. Habitus ( Fig. 80A ), length 0.71 mm.

COLOUR. Dark brown, shining, pubescence, legs and antennae dusky yellow.

HEAD. With a foveolate shallow linear depression behind the eyes, width across eyes 0.20 mm; mentum as Fig. 4A ; antennomeres III–XI, length 0.31 mm, III–IX length 0.20 mm, X–XI length 0.11 mm.

PRONOTUM. 0.19 mm long, 0.30 mm wide, sparsely pubescent without either foveolae or foveae; lateral margins evenly rounded to slightly acute hind angles, narrowly bordered, the border running along the entire posterior margin though narrower in the sinuous medial emargination in front of the scutellum ( Fig. 80B ).

ELYTRA. 0.45 mm long, 0.35 mm wide, pubescent as pronotum, shallowly foveolate. MESOVENTRITE. Medial extension of collar tapering posteriorly then parallel-sided; mid-keel broadest anteriorly then slightly concave to rounded posterior angles; keel with ± eight setae, long, parallel to pointed termination posterior to the interruption point of the mesocoxal margins; mesoventral lateral margins straight to rounded rectangular angles, without serrations; humeri toothed ( Fig. 80C ).

METAVENTRITE. Sparsely pubescent, length 0.15 mm, disc simple, width across spines 0.12 mm; posterior margin of mesocoxae serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Male not known.

Remarks

The only species of Cissidium to have been described from Trinidad.

Figures

Fig. 80. Cissidium steeli sp. nov. A. Habitus. B. Pronotum, × 680. C. Mesoventrite showing median process of collar, mid-keel and keel, × 785.

Fig. 4. Menta and submenta. A. Cissidium petri Darby, 2015, × 1380. B. Cissidium tigrum Darby, 2015, × 1220. C. Cissidium amboroense Darby, 2015, × 1260. D. Cissidium losbanos sp. nov., × 1100. E. Cissidium triangulum Darby, 2019, × 650. F. Cissidium pilosellum sp. nov., × 1420.