Diutius sexpunctatus (Kirsch)

Opitz, Weston, 2016, Classification, natural history, and evolution of the subfamily Peloniinae Opitz (Coleoptera: Cleroidea: Cleridae). Part VI. New taxonomic placement for Pelonium sexpunctatum Kirsch, Insecta Mundi 2016 (496), pp. 1-5 : 1-2

Diutius sexpunctatus (Kirsch)

Figures 1, 2, 4 , 5 .

Pelonium ? sexpunctatum Kirsch, 1874: 398 . Lectotype. Female. PERU, Pozuzu, M. Kirsch (SMTD). Corporaal 1950: 290 ( Corinthiscus ). Kirsch did not specify as to the number of specimens that were involved in his description. Therefore, I invoke Recommendation 73F of the ICZN (1999) and designate a lectotype for this nominal species.

Diagnosis. Specimens of this species resemble superficially those of Diutius gallerucoides ( Spinola, 1844: 372) , but in Diutius sexpunctatus (Kirsch) specimens the elytral disc shows 6 maculae ( Fig. 5 ) not 8 ( Fig. 6 ) as is the case in its congener.

Redescription. Size: Length 10.0 mm; width 3.2 mm. Form: Oblong, short, rectangular ( Fig. 5 ). Color: Mouthparts testaceous, except mandibles brown; antenna mostly testaceous, posterior margin of capitulum brown; thorax, legs, and abdomen testaceous; elytra mostly testaceous, with 6 brown maculae. Head: Funicular antennomeres progressively shorter, capitulum longer than combined length of funicular antennomeres, capitular antennomeres very long ( Fig. 1 ); eyes coarsely facetted and bulgy, frons slightly narrower than width of eye (EW/FW 22/20). Thorax: Pronotum ( Fig. 2 ) slightly transverse (PW/ PL 72/70), side margin with shallow tubercle, disc finely sparsely punctate; elytral without asetiferous punctation (EL/EW 240/60). Abdomen: Pygidium scutiform.

Variation. Size: Length 9.0-10.0 mm; width 3.0- 3.2 mm. Other than body size, the available specimens are quite homogeneous.

Distribution. In addition to the lectotype, I examined one specimen from: Peru: Tarapoto, Mai a Aut, 1886, M de Mathan. Specimens are deposited in MNHN and SMTD.

Figures

Figures 1-4. Structures and map of Diutius species. 1) Antenna of D. sexpunctatus. 2) Pronotum of D. sexpunctatus. 3) Pronotum of D. gallerucoides. 4) Geographic distribution of Diutius species as noted.

Figures 5-8. Habitus and male genitalia. 5) Habitus of D. sexpunctatus. 6) Habitus of D. gallerucoides. 7) Habitus of D. pallidus. 8) Male genitalia of D. pallidus.