Cissidium inexspectatum, 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 : 44-46

Cissidium inexspectatum sp. nov.

urn:lsid:zoobank.org:act:213F3821-506C-42ED-8272-63DFB5D0C9C1

Fig. 28

Etymology

Johnson ms name, derivation unclear.

Material examined

Holotype

NEW CALEDONIA • ♂; Col des Rousiettes; 1970; H. Franz leg.; MM holotype; MMUE.

Paratype

NEW CALEDONIA • 1 ♀; Table d’Union, Col d’Amieu; label lettering style suggests also collected by H. Franz; MMUE.

Description

SIZE. Habitus ( Fig. 28A ), length 0.63 mm.

COLOUR. Dark brown, shining, elytra dusky yellow where translucent, pubescence and antennae yellow.

HEAD. Without a clear linear depression behind the eyes, width across eyes 0.21 mm; antennomeres III– XI length 0.42 mm, III–IX length 0.25 mm, X–XI length 0.17 mm; mentum as Fig 4A.

PRONOTUM. Length 0.15 mm, width 0.25 mm, sparsely pubescent, with a row of six foveae in two groups of three separated medially; lateral margins rounded almost parallel posteriad to rectangular hind angles, lateral border not running onto the posterior margin which has a sinuous emargination in front of the scutellum ( Fig. 28B ).

ELYTRA. Length 0.45 mm, width 0.35 mm, pubescent, setae same length as pronotum, faintly foveolate the foveolae more strongly marked in basal half.

MESOVENTRITE. Collar medial extension pointed; mid-keel parallel-sided, posterior corners with short carinae reaching mesocoxae, sharply raised medially at junction with keel; keel with ± two setae, narrow,

long, with pointed termination slightly below interruption of mesocoxal margins; mesoventral lateral margins with ± two wide serrations; humeri toothed ( Fig. 28C ).

METAVENTRITE. Length 0.12 mm, with scattered setae, disc plain, width across spines 0.11 mm, posterior margins of mesocoxae not serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus as Fig. 6 Fa–b. Female spermatheca pear-shaped.

Remarks

The very long mesoventral mid-keel distinguishes this species from other New Caledonian Cissidium .

Figures

Fig. 28. Cissidium inexspectatum sp. nov. A. Habitus. B. Pronotum, × 660. C. Mesoventrite showing median process of collar, mid-keel and keel, × 1120.

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.