Cissidium luctuosum, 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 : 119-120

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.3795632
persistent identifier	https://treatment.plazi.org/id/93ACA134-45EB-42F0-BE9E-CB51DAECDEBA
taxon LSID	lsid:zoobank.org:act:93ACA134-45EB-42F0-BE9E-CB51DAECDEBA
treatment provided by	Valdenar
scientific name	Cissidium luctuosum
status	sp. nov.

Treatment

Cissidium luctuosum View in CoL sp. nov.

urn:lsid:zoobank.org:act:93ACA134-45EB-42F0-BE9E-CB51DAECDEBA

Fig. 75 View Fig

Etymology

Johnson ms name. From the Latin adjective ‘ luctuosus ’, meaning ‘sorrowful’ or ‘mourning’ and presumably referring to the dark colour.

Material examined

Holotype

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

Description

SIZE. Habitus ( Fig. 75A View Fig ), length 0.74 mm.

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

HEAD. With a linear depression behind the eyes, width across eyes 0.19 mm; antennomeres III–XI length 0.33 mm, III–IX length 0.21 mm, X–XI length 0.12 mm; mentum obscured.

PRONOTUM. Length 0.19 mm, width 0.28 mm, pubescence confined mainly to margins, without either foveolae or foveae; sides evenly rounded to rectangular hind angles, bordered laterally, the border continuing along the posterior margin as far as the emargination opposite the scutellum ( Fig. 75B View Fig ).

ELYTRA. Length 0.47 mm, width 0.38 mm, sparsely pubescent throughout.

MESOVENTRITE. Median process of mesoventral collar parallel-sided, extending to mid-point of mid-keel; mid-keel almost parallel-sided, hind angles effaced before mesocoxal anterior borders, raised before joining keel; keel with ± four setae, narrow, almost parallel-sided, terminating in a point past the midpoint of the mesocoxae; mesoventral lateral margins effaced, barely visible; humeri sharply toothed ( Fig. 75C View Fig ).

METAVENTRITE. Length 0.15 mm, sparsely setose, disc simple, width across spines 0.10 mm.

WINGS. Macropterous.

GENITALIA. Female spermatheca distinctive as Fig. 6E View Fig . Males not known.

Remarks

One of the five Panamanian species in this group. Distinguished by the disc of the pronotum lacking setae and by the setose posterior termination of the median extension of the mesoventral collar.