Cissidium elongatum 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 : 109-111

Cissidium elongatum Sawada, 2008

Fig. 69

Material examined

Paratypes

JAPAN • 5 ex.; Mt Ichifusa , Kumamoto Pref.; 13 May 1985; S. Nomura leg.; YS • 1 ♂; Kawakami-mura , Nara Pref.; 29 Jan. 1995; K. Ikeuchi leg.; BMNH • 1 ♂; Mt Kumosou , Tokushima Pref.; 18 Aug. 1988; M. Sakai leg.; YS • 1 ♂; Nakanoshima Is. Tokara Isls. , Kagoshima Pref.; 2 May 1987; S. Nomura leg.; BMNH • 5 ♂♂; Hatsuno, Amami-Oshima Is. , Kagoshima Pref.; 13 Oct. 1988; Y. Nishikawa leg.; YS, BMNH • 1 ♂; Haneji, Mt. Tanodake , Okinawa Pref.; 25 Oct. 1987; Y. Nishikawa leg.; YS .

Supplementary description

The following description amplifies the type description of Sawada (2008) in order to conform with the entries in the present paper.

SIZE. Habitus ( Fig. 69A ), length 0.72 mm.

COLOUR. Reddish brown to light brown, antennae, legs and pubescence dusky yellow. HEAD. With a deep transverse depression behind the eyes, width across eyes 0.21 mm.

PRONOTUM. Length 0.19 mm, width 0.29 mm, pubescent and shallowly foveolate; side margins rounded to obtuse hind angles, narrowly bordered, the border continuing along the posterior margin to the sinuous emargination opposite the scutellum ( Fig. 69B ).

ELYTRA. Length 0.45 mm, width 0.38 mm, more densely pubescent basally than pronotum, without foveolae.

MESOVENTRITE. Median extension of keel very broad; mid-keel anteriorly same width as collar extension then with concave sides to hind angles not reaching anterior borders of the mesocoxae; keel tapering to point below mid-point of the mesocoxae; mesoventral lateral borders evenly rounded and serrate in posterior half; humeri toothed ( Fig. 69C ).

METAVENTRITE. Sparsely pubescent; length 0.15 mm; disc simple, distance across spines 0.11 mm; mesocoxal posterior borders serrate.

GENITALIA. Male aedeagus very short as Fig. 6 Ia–b. Female spermatheca ovoid.

Remarks

The only Japanese species in this group.

Figures

Fig. 69. Cissidium elongatum Sawada, 2008. A. Habitus. B. Pronotum, × 525 C. Mesoventrite showing median process of collar, mid-keel, keel and lateral margin, × 665.

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.