Cissidium bifoveolatum, 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 : 27-29

Cissidium bifoveolatum sp. nov.

urn:lsid:zoobank.org:act:793E71EC-48C7-4E7E-A407-98F783A8835D

Figs 5A , 17

Etymology

Johnson ms name, presumably after the two large foveae on the pronotum.

Material examined

Holotype

MADAGASCAR • ♂; East, Baie d’Antongil , Ambohitsitondroina ; 500 m a.s.l.; roots of Asplenium ; Dec. 1959; J. Vadon leg.; identified as Camptodium by CJ; MMUE.

Paratypes

MADAGASCAR • 8 ex.; same collection data as for holotype; MMUE, BMNH .

Description

SIZE. Habitus ( Fig. 17A ), length 0.69 mm.

COLOUR. Yellow brown appearing polished, head darker, pubescence, legs and antennae paler. HEAD. With a shallow depression interrupted medially behind the eyes, width across eyes 0.21 mm; antennomeres III–XI length 0.35 mm, III–IX length 0.21 mm, X–XI length 0.14 mm, mentum and submentum as Fig. 4A , but with faint circular depressions.

PRONOTUM. Length 0.20 mm, width 0.27 mm, pubescence sparse, with four foveae in the posterior third the two medial ones much larger than the two close to the corners; side margins rounded then sinuate to rectangular hind angles, narrowly bordered, the border extending for a short distance along the posterior margin which has a sinuous emargination before the scutellum ( Fig. 17B ).

ELYTRA. Length 0.45 mm, width 0.38 mm, pubescence mainly confined to lateral margins.

MESOVENTRITE. Medial extension of collar narrow, short; mid-keel posterior and anterior corners of approximately same width, the posterior margin reaching anterior margin of the mesocoxal cavities, sharply raised medially to keel; keel narrow, parallel-sided, bearing ¾ setae, terminating between the mesocoxae ( Fig. 5A ); mesoventral lateral margins loosely serrate in posterior half; humeri strongly toothed ( Fig. 17C ).

METAVENTRITE. Length 0.14 mm, width across spines 0.09 mm, glabrous, disc plain. Posterior margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Male aedeagus as Fig. 6L but tip blunter.

Remarks

One of the five species of Cissidium recorded from Madagascar in this group, only likely to be confused with C. banari , but distinguished by its smaller size and longer pronotal pubescence.

Figures

Fig. 5. Figures to show keel shapes. A. Cissidium bifoveolatum sp. nov., × 515. B. Cissidium lucidulum sp. nov., × 780. C. Cissidium scutellaris (Deane, 1931), × 1480. D. Cissidium tigrum Darby, 2015, × 840. E. Cissidium sawadai Darby, 2015, × 680. F. Cissidium lisae Darby, 2015, × 823.

Fig. 17. Cissidium bifoveolatum sp. nov. A. Habitus. B. Pronotum, × 620. C. Mesoventrite showing median process of collar, mid-keel and keel, × 945.

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.