Cissidium matthewsi Johnson, 2007

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 52-53

Cissidium matthewsi Johnson, 2007

Fig. 33

Johnson (2004) erroneously gave Cissidium matthewsi as a replacement name for Camptodium adustipenne Matthews, 1884 , but corrected that in 2007 ( Johnson 2007) pointing out that the latter was a misidentification of Camptodium adustipenne ( Johnson 2007) .

Cissidium matthewsi Johnson sp. nov. was characterized in Matthews (1884: 83) and the holotype recorded as being in MMUE. The following is based on an examination of the holotype and on the description given by Sawada (2008) who also examined it.

Etymology

Named after the reverend A. Matthews.

Material examined

Holotype JAPAN • ♂; Manazuru, Kanagawa Pref.; 3 Nov. 1967; M. Kubota leg.; MM holotype; MMUE.

Paratypes JAPAN • 1 ♀, 1 ♂; same collection data as for holotype; MMUE, BMNH • 2 ♀♀; Odawara, Kanagawa Pref.; 7 Apr. 1946; M. Kubota leg.; one mounted verso also bears a label stating Camptodium sp. E. Sundt; v.66; MMUE, BMNH • 4 ex.; same collection data as for preceding but 28 Mar. 1971; one mounted verso; MMUE .

Additional material

Sawada lists numerous records from Japan where the species appears to be the commonest Cissidium .

Supplementary description

SIZE. Habitus ( Fig. 33A ), length 0.66 mm.

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

HEAD. With a narrow foveolate linear depression behind the eyes, width across eyes 0.21 mm; antennomeres III–XI length 0.30 mm, III–IX length 0.19 mm, X–XI length 0.11 mm. globular; mentum and prementum obscured.

PRONOTUM. Length 0.17 mm, pubescent, without foveolae, two pairs of three foveae along posterior margin the outside pair much smaller than the other four; lateral margins rounded then slightly concave to rectangular hind angles, front angles rounded, sides bordered, the border not extending along the posterior margin, medial emargination in front of scutellum with shallow angulate corners ( Fig. 33B ).

ELYTRA. Length 0.56 mm, width 0.45 mm, densely pubescent and foveolate contrasting with the pronotum, the foveolae more marked in basal half, setae of the same length as those on the pronotum.

MESOVENTRITE. Medial extension of collar parallel-sided; mid-keel anterior and posterior margins of same length, anterior angles not reaching mesocoxae, raised medially to a sharp point before keel; keel wide, parallel-sided with ± four setae and rounded termination just below interruption of mesocoxal margins; mesoventral lateral margins serrate in posterior half; humeri bluntly toothed ( Fig. 33C ).

METAVENTRITE. Length 0.18 mm, disc simple, distance across spines 0.15 mm; posterior margins of mesocoxae serrate.

GENITALIA. Male aedeagus as Fig. 6 Fa–b. Female spermatheca globular.

Remarks

This is the only Japanese species in this group apart from C. ishigakiense from which it may be distinguished by the more rounded elytra and broader based pronotum.

Figures

Fig. 33. Cissidium matthewsi Johnson, 2007. A. Habitus. B. Pronotum, × 430. C. Mesoventrite showing median process of collar, mid-keel and keel, × 1295.

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.