Cissidium dividuum, 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 : 144-145

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.3795710
persistent identifier	https://treatment.plazi.org/id/5D646C8C-1C66-47ED-A68B-731F740CAD61
taxon LSID	lsid:zoobank.org:act:5D646C8C-1C66-47ED-A68B-731F740CAD61
treatment provided by	Valdenar
scientific name	Cissidium dividuum
status	sp. nov.

Treatment

Cissidium dividuum View in CoL sp. nov.

urn:lsid:zoobank.org:act:5D646C8C-1C66-47ED-A68B-731F740

Fig. 91 View Fig

Etymology

Johnson ms name, derivation not clear.

Material examined

Holotype

PANAMA • ♀; Chiriqui Prov., Castita Alta, Finca Larida nr Boquete ; 18 Mar. 1959; 6900 ft a.s.l.; berlese (543), cont. floor debris in deep ravine; H.S. Dybas leg.; FM(HD) #59.261; FMNH.

Description

SIZE. Habitus ( Fig. 91A View Fig ), length 0.72 mm.

COLOUR. Dark brown, shining, pubescence, antennae and legs paler, head darker.

HEAD. With a linear depression behind the eyes, width across eyes 0.19 mm; antennomeres III–XI length 0.32 mm, III–IX length 0.17 mm, X–XI length 0.15 mm; mentum and prementum obscured.

PRONOTUM. Length 0.20 mm, width 0.28 mm, pubescent, shallowly foveolate in basal half; lateral margins sharply angled and strongly bordered, the borders with prominent rounded angles at the anterior corners and running a short distance along the posterior margin, hind angles markedly acute, posterior margin with an emargination opposite the scutellum ( Fig. 91B View Fig ).

ELYTRA. Length 0.47 mm, width 0.41 mm, pubescent, setae same length as pronotum, without foveolae.

MESOVENTRITE. Collar without a medial extension; mid-keel narrow, posterior corners clearly joining mesocoxal anterior margins, sharply raised at junction with keel, with ± two setae; keel with ± four setae, parallel-sided to bluntly pointed termination below the mesocoxae; mesoventral lateral margins almost obliterated, without serrations; humeri toothed ( Fig. 91C View Fig ).

METAVENTRITE. Length 0.17 mm sparsely pubescent, with shallow medial depression, disc simple, width across spines 0.11 mm, posterior margins of mesocoxal borders without serrations.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

One of the three Brazilian species in this group. Only likely to be confused with C. cryptophagoides sp. nov. if the mesoventral characters are studied, but unlike that species the pronotal lateral borders are concave and the hind angles sharply acute.