Cissidium ishigakiense Sawada, 2008

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 46-47

Cissidium ishigakiense Sawada, 2008

Fig. 29

Material examined

Paratype

JAPAN • 1 ♂; Komi, Ishigaki Island , Okinawa Pref.; 9 May 1999; pile of straw; Y. Sawada leg.; mounted as a disarticulated slide; YS.

Supplementary description

The description below concentrates on amplifying Sawada (2008) with more details of the meso- and metaventral characters in order to conform with the entries in the present paper.

SIZE. Habitus ( Fig. 29A copied from Sawada 2008), length 0.7 mm.

COLOUR. Dark brown, antennae dusky yellow.

HEAD. Width across eyes 0.32 mm; mentum obscured; antennomeres III–XI, length 0.33 mm, III–IX length 0.17 mm, X–XI length 0.16 mm.

PRONOTUM. 0.17 mm long, 0.27 mm wide, lateral margins rounded then almost parallel sided to rectangular hind angles, bordered, the borders not continuing along the posterior margin, medial emargination opposite the scutellum shallowly sinuate ( Fig. 29B ).

ELYTRA. 0.42 mm long, 0.40 mm wide.

MESOVENTRITE. Medial extension of collar tapering from broad base to mid-point of mid-keel; mid-keel sides concave, hind angles not reaching mesocoxal anterior borders, raised medially before keel; keel long, narrow, terminating in a point between the mesocoxae; mesoventral lateral margins serrate in posterior half; humeri toothed ( Fig. 29C ).

METAVENTRITE. Sparsely pubescent, length 0.12 mm, disc simple, width across spines 0.08 mm; posterior margin of mesocoxae serrate.

GENITALIA. Male aedeagus as Fig. 6 Fa–b but slightly more elongate. Females not known.

Remarks

This is the only Japanese species into this group apart from C. matthewsi Johnson, 2007 . It may be distinguished from that species and all other Japanese species by the narrow almost parallel sided elytra.

Figures

Fig. 29. Cissidium ishigakiense Sawada, 2008. A. Habitus. B. Pronotum from slide preparation. C. Meso- and metaventrite from slide preparation.

Fig. 6. Figures to show genitalia types. – Spermathecae. A. Cissidium bilineatum sp. nov. B. Cissidium amboroense Darby, 2015. C. Cissidium sawadai Darby, 2015. D. Cissidium arcuatum sp. nov. E. Cissidium murphyi sp. nov. – Aedeagi. F. Cissidium petri Darby, 2015. G. Cissidium clareae sp. nov. H. Cissidium fraternum sp. nov. I. Cissidium tigrum Darby, 2015. J. Cissidium apterum sp. nov. K. Cissidium brachypterum sp. nov. L. Cissidium greensladei sp. nov. M. Cissidium kolombangaricum sp. nov. N. Cissidium mindanao sp. nov.