Cissidium lisae Darby, 2015

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 149-150

Cissidium lisae Darby, 2015

Figs 2F , 5F , 94

Material examined

Holotype

BOLIVIA • ♀; Santa Cruz Dep., W Amboro NP, Siberia Pass env.; 17°50′12″ S, 64°42′08″ W; 2450 m a.s.l.; 28 Nov. 2013; sifting litter; Winkler app. extr.; P. Baňař leg.; UASC.

Paratypes

BOLIVIA • 1 ♀; same collection data as for holotype; MMBC • 1 ♀; Santa Cruz Dep., W of Amboro NP, Siberia Pass env., 17°50′25″ S, 64°41′58″ W; 2481 m a.s.l.; 2013; sifting litter; Winkler app. extr.; P. Baňař leg.; BMNH .

Supplementary description

The following description amplifies the type description of Darby (2015), by adding more details of the meso- and metaventral characters, in order to conform with the entries in the present paper.

SIZE. Habitus ( Fig. 94A ), length 0.80 mm.

COLOUR. Yellow brown, antennae and legs dusky yellow.

HEAD. Width across eyes 0.22 mm; antennomeres 3–11 length 0.45 mm long ( Fig. 2F ); mentum as Fig. 4B.

PRONOTUM. Length 0.19 mm, width 0.28 mm, sparsely pubescent and foveolate; lateral margins sharply angled, strongly concave posteriad to rectangular hind angles, less markedly concave anteriorly to distinct obtusely rounded front angles ( Fig. 94B ).

ELYTRA. 0.55 mm long, 0.41 mm wide, pubescence a little shorter and more decumbent than on the pronotum.

MESOVENTRITE. Median process of the very narrow collar pointed; mid-keel strongly widened anteriorly, hind angles with carinae to mesocoxal anterior borders, bluntly raised medially before junction with keel; keel with ± five setae, parallel-sided to rounded termination at base of mesocoxae ( Fig. 5F ); humeri toothed with flat, sharply pointed carinae reaching posteriorly to mid-point of mesoventrite, mesoventral lateral margins entirely effaced, present as apodemes ( Fig. 94C ).

METAVENTRITE. Spines very small.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

Differs from the other Bolivian Cissidium , except C. sawadai Darby, 2015 , by the long and narrow elytra and distinguishable from that species by the strongly tapering mid-keel.

Figures

Fig. 2. A–B. Mesoventra of two species of Dacrysoma Grebennikov, 2009 to show form of mid-keel and perforation fringed by setae. C–E. Figures to explain use of the terms foveae, distinct foveolae and shallow foveolae in distinguishing the main species groups. C. Distinct foveolae, showing setae arising from the anterior margin of the depressions. D. Foveae and foveolae, showing setae randomly associated with foveae. E. Shallow foveolae, many setae rubbed off, but insertion points marked by punctures with slightly raised circular rims. F–I. Figures to show different forms of antennae. F. Elongate antenna of Cissidium lisae Darby, 2015. G. Globular antennomere of Cissidium globosum Darby, 2015. H. Female and male antennae of Cissidium petri Darby, 2015. I. Abnormal antennomere XI of Cissidium tigrum Darby, 2015.

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. 94. Cissidium lisae Darby, 2015. A. Habitus. B. Pronotum, C. Mesoventrite showing median process of collar, mid-keel and keel, × 550.

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.