Cissidium greensladei, 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 : 40-41

Cissidium greensladei sp. nov.

urn:lsid:zoobank.org:act:4F505BEE-816C-4B98-A537-37DA9480F89A

Figs 6L , 7C , 25

Etymology

Johnson ms name, in recognition of the late P. Greenslade, collector of this and other Solomon Island specimens.

Material examined

Holotype SOLOMON ISLANDS • ♂; Guadalcanal, Mt. Austen ; 22 Jul. 1963; no. 11278; P. Greenslade leg.; BMNH.

Paratypes SOLOMON ISLANDS • 1 ♂; Guadalcanal, Kukum ; Jun.–Jul. 1966; no. 21759; P. Greenslade leg.; BMNH • 1 ♂; Mt. Austen ; 14 May 1963; no. 6048; P. Greenslade leg.; MMUE • 1 ♀; same collection data as for preceding but 29 Nov. 1963; no. 11031; MMUE • 1 ♂; same collection data as for preceding but 21 Sep. 1965; no. 19247; MMUE • 1 ♀; same collection data as for preceding but Feb. 1966; no. 21243; BMNH • 1 ♂; same collection data as for preceding but Mar. 1966; no. 21336; BMNH .

Description

SIZE. Habitus ( Fig. 25A ), length 0.67 mm.

COLOUR. Dusky yellow.

HEAD. Shallowly foveolate between eyes, width across eyes 0.21 mm; antennomeres III–XI 0.32 mm long, III–IX 0.16 mm long, X–XI 0.16 mm; mentum as Fig.4A.

PRONOTUM. Length 0.19 mm, width 0.29 mm, sparsely pubescent, base with a series of five or six foveae of approximately equal size and spacing but with a wider gap opposite the scutellum; sides sharply angled, slightly convexly curved to rectangular hind angles, front angles obtuse, not evenly rounded, conspicuously bordered, the border not continuing along the posterior margin which has a sinuous emargination before the scutellum ( Fig. 25B ).

ELYTRA. Length 0.43 mm, breadth 0.37 mm; foveolate, the foveolae more conspicuous and denser in the basal half.

MESOVENTRITE. Medial extension of collar short, pointed; mid keel wider anteriorly, hind angles with carinae to mesocoxae, medially raised with a ridge; keel narrow with ± three setae tapering to a point past the mid-point of the mesocoxae; mesoventral lateral borders serrate in posterior half; humeri toothed ( Fig. 25C ).

METAVENTRITE. Length 0.13 mm, no spines detected but two clear foveae may mark their insertion points if abraded, width across these 0.11 mm, with a large medial fovea on disc in front the mesocoxae ( Fig. 7C ), disc slightly depressed behind this; mesocoxal posterior margins serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus ( Fig. 6L ). Female spermatheca globular.

Remarks

Distinguished from other species from the Solomon Islands in this group by the narrower mesoventral mid-keel and the form of the male aedeagus.

Figures

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.

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. 25. Cissidium greensladei sp. nov. A. Habitus. B. Pronotum, × 565. C. Mesoventrite showing median process of collar, mid-keel and keel, × 455.

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.