Cissidium insulare, 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 : 116-117

Cissidium insulare sp. nov.

urn:lsid:zoobank.org:act:D36570BE-5CC4-4B8B-9D43-06E6A02D87F1

Fig. 73

Etymology

Johnson ms name, after the discovery of the species on an island ( Jamaica).

Material examined

Holotype

JAMAICA • ♀; Blue Mountains , near Hardwar Gap; 20 Nov. 1968; forest litter; H. Franz leg.; MMUE.

Paratype

JAMAICA • ♂; same collection data as for holotype; mounted verso; MMUE.

Additional material

Two indet. specimens mounted as slides without data except ‘Jamaica’ in MMUE may be associated with these specimens.

Description

SIZE. Habitus ( Fig. 73A ), length 0.84 mm.

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

HEAD. With a linear depression behind the eyes, width across eyes 0.22 mm; antennomeres III–XI length 0.40 mm, III–IX length 0.25 mm, X–XI length 0.25 mm; mentum and prementum obscured.

PRONOTUM. Length 0.22 mm, width 0.38 mm, densely pubescent, without foveae and only very faint foveolae; lateral margins rounded, almost parallel posteriad, hind angles rounded, narrowly bordered, the border continuing onto the posterior margin but absent opposite the scutellum, emargination opposite the scutellum absent ( Fig. 73B ).

ELYTRA. Length 0.56 mm, width 0.45 mm, densely pubescent and faintly foveolate as pronotum.

MESOVENTRITE. Collar medial extension short, pointed; mid-keel almost parallel-sided, posterior corners with short carinae reaching mesocoxal anterior borders, raised medially at junction with keel; keel, narrow, long, with pointed termination mid-way between mesocoxae; mesoventral lateral margins serrate in posterior half; humeri toothed ( Fig. 73C ).

METAVENTRITE. Length 0.13 mm, male with a deep triangular, shallowly foveolate depression with a sharply marked emargination in the posterior margin (as Fig 7E ); posterior borders of mesocoxae not serrate.

WINGS. Female apterous. Male macropterous.

GENITALIA. Female spermatheca globular. Male aedeagus narrow and sharply pointed.

Remarks

Distinguished from C. seditiosum sp. nov., the only other species of Cissidium reported from Jamaica, by the rounded as opposed to acute hind angles of the pronotum.

Figures

Fig. 73. Cissidium insulare sp. nov. A. Habitus. B. Pronotum, × 315. C. Mesoventrite showing median process of collar, lateral margin, mid-keel and keel, × 595.

Fig. 7. Metaventral and male ventrite examples. A–B. Metaventrite posterior margin to show spines. A. Cissidium riparium sp. nov., × 610. B. Cissidium plaumanni sp. nov., × 970. C–D. Metaventral discs. C. Cissidium greensladei sp. nov., × 455. D. Cissidium insulare sp. nov., × 595. E. Cissidium obscenum sp. nov., × 840. F–G. Terminal male ventrites. F. Cissidium petri Darby, 2015, × 1580. G. Cissidium amboroense Darby, 2015, × 1380.