Cissidium ceylonicum, 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 : 29-30

Cissidium ceylonicum sp. nov.

urn:lsid:zoobank.org:act:92DE2EED-460C-4482-9AD2-6EEAE0CBA59A

Fig. 18

Etymology

Johnson ms name after the country where the insect was collected.

Material examined

Holotype

SRI LANKA • ♀; Sabaragamuwa, 2 miles east of Kalawana; 20 Jan. 1970; Mussard, Besuchet and Löbl leg.; MMUE.

Paratypes

SRI LANKA • 3 ♂♂, 1 ♀ (1 ♂, 1 ♀ mounted verso); same collection data as for holotype; MMUE .

Description

SIZE. Habitus ( Fig. 18A ), length 0.69 mm.

COLOUR. Dark yellow brown, head slightly darker, pubescence, legs and antennae yellow.

HEAD. Without a clear linear depression behind the eyes, width across eyes 0.21 mm, antennomeres III–XI length 0.38 mm, III–IX length 0.22 mm, X–XI length 0.16 mm, mentum and prementum as Fig 4A but sides a little more concave.

PRONOTUM. Length 0.19 mm, width 0.28 mm, sparsely pubescent with a series of ± eight foveae along the posterior margin, the six medial ones united into two large transverse ones; lateral margins rounded to rectangular hind angles, bordered, the border not extending along the posterior margin which has a sinuous emargination before the scutellum ( Fig. 18B ).

ELYTRA. Length 0.43 mm, width 0.41 mm, pubescent, the setae arising from shallow foveolae.

MESOVENTRITE. Medial extension of collar pointed; mid-keel wider anteriorly, posterior corners with carinae to anterior margins of mesocoxal borders, sharply raised medially before keel; keel with a series of ± eight setae, parallel-sided to a blunt termination beyond the interruption of the mesocoxal margins; mesoventral lateral margins serrate in posterior half; humeri toothed ( Fig. 18C ).

METAVENTRITE. Length 0.13 mm, pubescent, width across narrow finely pointed spines 0.11 mm, disc simple; posterior margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Male aedeagus as Fig. 6 Fa–b.

Remarks

The only species of Cissidium from Sri Lanka in this group.

Figures

Fig. 18. Cissidium ceylonicum sp. nov. A. Habitus. B. Pronotum, × 590. C. Mesoventrite showing median process of collar, mid-keel and keel, × 630.

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.