Cissidium subangulatum, 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 : 166-168

Cissidium subangulatum sp. nov.

urn:lsid:zoobank.org:act:ED371CB6-DA3D-4967-B89B-96B19C80A15E

Fig. 105

Etymology

Johnson ms name.

Material examined

Holotype

PANAMA • ♀; W of Finca Palo Santo, nr Nueva California , Chirique Prov.; 9 Mar. 1959; Berlese floor litter in damp ravine; 4900 ft a.s.l.; H.S. Dybas leg.; FMNH.

Description

SIZE. Habitus ( Fig. 105A ), length 0.64 mm.

COLOUR. Dark brown, pubescence, legs and antennae brown.

HEAD. With a shallow foveolate linear depression behind the eyes, width across eyes 0.17 mm; mentum as Fig. 4A ; antennomeres III–XI, length 0.29 mm, III–IX length 0.13 mm, X–XI length 0.16 mm. [one antenna missing].

PRONOTUM. 0.17 mm long, 0.25 mm wide, pubescent without either foveolae or foveae; lateral margins sharply angled, strongly rounded to anterior angles, concave to acute posterior angles, strongly bordered, the border not continuing along the posterior margin, posterior medial emargination opposite the scutellum clearly marked ( Fig. 105B ).

ELYTRA. 0.41 mm long, 0.34 mm wide, pubescent as pronotum.

MESOVENTRITE. Medial extension of collar onto the mid-keel tapering then parallel-sided terminating in a fringe of setae which fan out across the mid-keel; mid-keel with concave sides, the anterior margin slightly wider than the posterior, hind angles rounded stopping well short of the mesocoxal anterior borders and marked by some shallow radiating depressions in the mesoventrite; keel, long, narrow, parallel-sided and with ± fourteen setae terminating close to base of mesocoxae; mesoventral lateral margins sinuous then effaced before joining mesocoxae, without serrations; humeri toothed ( Fig. 105C ).

METAVENTRITE. Sparsely pubescent, length 0.13 mm, disc simple, width across spines 0.12 mm; posterior margin of mesocoxae not serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

The only species of Cissidium from Panama in this category.

Figures

Fig. 105. Cissidium subangulatum sp. nov. A. Habitus. B. Pronotum, × 585. C. Mesoventrite showing median process of collar, mid-keel and keel, × 1380.

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.