Cissidium subfaustum, 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 : 128-129

Cissidium subfaustum sp. nov.

urn:lsid:zoobank.org:act:E204C76D-EAD4-4C6E-BDCA-DDDED90DD366

Fig. 81

Etymology

Johnson ms name referring to similarity of the species to C. faustum sp. nov.

Material examined

Holotype

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

Description

SIZE. Habitus ( Fig. 81A ), length 0.71 mm.

COLOUR. Dark brown, pubescence, legs and antennae dusky yellow. HEAD. With a shallow foveolate and setose linear depression behind the eyes, width across eyes 0.17 mm; mentum as Fig. 4A ; antennomeres III–XI, length 0.34 mm, III–IX length 0.15 mm, X–XI length 0.19 mm.

PRONOTUM. 0.20 mm long, 0.25 mm wide, pubescent with shallow foveolae in basal half; lateral margins evenly rounded to acute hind angles, narrowly bordered, the borders continuing along the posterior margin to the angulate medial emargination opposite the scutellum ( Fig. 81B ).

ELYTRA. 0.39 mm long, 0.34 mm wide, pubescent and shallowly foveolate.

MESOVENTRITE. Medial extension of collar sharply pointed; mid-keel anterior angles effaced before reaching collar, posterior angles stopping well short of mesocoxae; keel long, with ± six setae, tapering to a sharp point near the base of the mesocoxae; mesoventral lateral margins effaced, without serrations; humeri toothed ( Fig. 81C ).

METAVENTRITE. Sparsely pubescent, length 0.12 mm, disc simple, width across spines 0.08 mm; posterior margin of mesocoxae not serrate.

WINGS. Apterous.

GENITALIA. Female spermatheca globular. Male not known.

Remarks

One of the five Panamanian species in this group. Distinguished by the sharp borders along the posterior margin of the pronotum.

Figures

Fig. 81. Cissidium subfaustum sp. nov. A. Habitus. B. Pronotum, × 410. C. Mesoventrite showing median process of collar, mid-keel and keel, × 1280.

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.