Cissidium ibicarense, 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 : 147-149

Cissidium ibicarense sp. nov.

urn:lsid:zoobank.org:act:2C9DAF49-AA1D-4D25-9365-428C13EAB2CC

Figs 3F , 93

Etymology

Johnson ms name, after Ibicare, a municipality in Santa Catarina in the South region of Brazil, where the insect was found.

Material examined

Holotype

BRAZIL • ♀; Ibicare ; 600 m a.s.l.; Sep. 1960; F. Plaumann leg.; FMNH.

Paratypes

BRAZIL • 10 ex.; same collection data as for holotype; one mounted verso; FMNH, MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 93A ), length 0.78 mm.

COLOUR. Yellow brown, shining, pubescence and antennae slightly paler.

HEAD. With a depression behind the eyes composed of foveae of different shapes, interrupted medially ( Fig. 3F ), width across eyes 0.22 mm; antennomeres III–XI length 0.38 mm, III–IX length 0.24 mm,

X–XI length 0.14 mm; mentum and prementum as Fig. 4B , base of mentum with a row of differently shaped foveolae interrupted by a narrow transverse depression.

PRONOTUM. Length 0.23 mm, width 0.34 mm, pubescent, without foveae, shallowly foveolate; lateral margins strongly bordered and sharply angled, concavely rounded to base, borders not continuing along posterior margin, hind angles sharply acute, posterior margin with emargination opposite the scutellum ( Fig. 93B ).

ELYTRA. Length 0.54 mm, width 0.40 mm, pubescent, setae same length as pronotum, foveolate the foveolae more strongly marked in basal half.

MESOVENTRITE. Collar with a median parallel-sided extension; mid-keel widest anteriorly, posterior corners effaced before reaching mesocoxal anterior borders, sharply raised at junction with keel with ± three setae from concave foveolae; keel tapering to pointed termination between the mesocoxae; mesoventral lateral margins rectangular without serrations; humeri toothed, posterior margins long and sinuous ( Fig. 93C ).

METAVENTRITE. Length 0.16 mm, setose, disc simple, width across spines 0.11 mm, spines long, sharply pointed; posterior margins of mesocoxae serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

One of the five Brazilian species in this group. Distinguished by the anterior angles of the mesoventral mid-keel which do not fuse with the collar.

Figures

Fig. 3. Figures to show differences in morphological features of head between eyes. A. Cissidium upiense sp. nov., × 565. B. Cissidium sueae sp. nov., × 480. C. Cissidium delicatum sp. nov., × 1060. D. Cissidium foveolatum Johnson, 1982, × 730. E. Cissidium basale Motschulsky, 1855, × 385. F. Cissidium ibicarense sp. nov., × 505. G. Cissidium eciton sp. nov., × 650.

Fig. 93. Cissidium ibicarense sp. nov. A. Habitus. B. Pronotum, × 505. C. Mesoventrite showing median process of collar, mid-keel and keel, × 1380.

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.