Cissidium plaumanni, 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 : 125-126

Cissidium plaumanni sp. nov.

urn:lsid:zoobank.org:act:42B630C8-C99C-4238-AA11-0ECF0C0D6E13

Figs 7B , 79

Etymology

Johnson ms name, after the collector Fritz Plaumann.

Material examined

Holotype

BRAZIL • ♂; Sta. Cat.; Apr. 1960; 27°9′ S, 52°15′ E; F. Plaumann leg.; FMNH.

Paratypes

BRAZIL • 12 ex.; same collection data as for holotype; 1 mounted verso, 4 mounted as slides; FMNH, MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 79A ), length 0.59 mm.

COLOUR. Yellow brown, antennae, legs and pubescence yellow. HEAD. Antennomeres III–XI length 0.32 mm, III–IX length 0.18 mm, X–XI length 0.14 mm; width across eyes 0.19 mm; mentum as Fig. 4A.

PRONOTUM. Length 0.17 mm, width 0.24 mm, pubescent, the setal insertion points slightly raised, without foveae and foveolae; lateral margins rounded to hind angles, bordered, the border rectangular at the hind angles and continued for a short distance along the hind margin then recursive, medial emargination opposite scutellum clearly defined ( Fig. 79B ).

ELYTRA. Length 0.37 mm, width 0.33 mm pubescent as pronotum.

MESOVENTRITE. Collar with a parallel-sided median extension; mid-keel narrow, parallel-sided, without anterior and posterior projections; keel very narrow tapering to a sharp point just below the interruption point of the mesocoxal margins; mesoventral lateral margins without serrations, humeri with large teeth ( Fig. 79C ).

METAVENTRITE. Sparsely pubescent, disc simple, length 0.13 mm, width between spines 0.08 mm, spines long, sharply pointed ( Fig. 7B ); mesocoxal posterior margins not serrate. WINGS. Macropterous.

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

Remarks

Distinguished from the other species of Cissidium from Brazil in this group by the recursive terminations of the posterior borders of the pronotum.

Figures

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.

Fig. 79. Cissidium plaumanni sp. nov. A. Habitus. B. Pronotum, × 590. C. Mesoventrite showing median process of collar, lateral margin, mid-keel and keel, × 740.

Fig. 4. Menta and submenta. A. Cissidium petri Darby, 2015, × 1380. B. Cissidium tigrum Darby, 2015, × 1220. C. Cissidium amboroense Darby, 2015, × 1260. D. Cissidium losbanos sp. nov., × 1100. E. Cissidium triangulum Darby, 2019, × 650. F. Cissidium pilosellum sp. nov., × 1420.

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.