Coridius singhalanus (Distant, 1900)

Boyane, Swapnil S., Sen, Sandeep, Priyadarsanan, Dharma Rajan, Thunga, Pavan Kumar, Joshi, Nikhil U. & Ghate, Hemant V., 2024, Integrative taxonomy of the genus Coridius Illiger, 1807 (Hemiptera: Heteroptera: Dinidoridae) reveals hidden diversity and three new species from North-East India, PLoS ONE (e 0298176) 1807 (7), pp. 1-46 : 21-22

Coridius singhalanus (Distant, 1900) ( Figs 5E, 6E, 7D, 9E, 10E, 11E and 12E).

Aspongopus singhalanus Distant, 1900: 222 ; 1902: 283; Bergroth, 1908: 188.

Kirkaldy, 1909: 257; Gravely, 1915: 509.

Coridius singhalanus Durai, 1986: 6 ; Mathew, 1986: 43; Durai, 1987: 196; Lis, 1990: 113, 142; 1992: 37; Rolston et al., 1996: 48, 100; Ahmad et al., 1997: 307, 319.

Material examined (images): Lectotype male: Aspongopus singhalanus Distant , designated by Durai (1987: 197) ( Fig 7D).

INDIA Assam, Sivsagar , leg. Anandita, 28.vii.2020, 26.982˚N, 94.642˚E, 100 m: 2 M, 3 F .

Diagnosis. Overall yellowish dorsally except head. Legs, membrane and connexivum fuscous. Lateral margins of mandibular plates, area near ocelli and eyes black; first four antennal segments black, fifth ochraceous with fuscous base and apex. Ocelli, callar region and base of the first antennal segment pale in colour. Basal fourth of clavus fuscous. Lateral margin of connexivum black, pale ventrally; rostrum, sternal area, coxae and pygophore ventrally pale; rest of body dark brown ( Figs 5E and 6E).

Head transverse: mandibular plates longer than clypeus, meeting in front of it and apex rounded, lateral margins sinuate ( Fig 9E), with sparse punctures; callar area distinct without punctures. Eyes pedunculate. Ocelli well developed, rounded, closer to eye than to each other. Antennae five segmented, first segment surpassing apex of head, second and third sub equal in length, fourth longest; second, third and fourth segments sulcate and laterally compressed, fifth finely setose and fusiform. Labium four segmented, reaching middle of mesosternum; first and second labial segments equal in length, third and fourth short. Bucculae prominent.

Male genitalia. Pygophore proximally narrow and distally broad, sclerotized; ventral rim of the pygophore slightly depressed with setae ( Fig 10E); moderately convex ventrally, with punctures and without setae ( Fig 11E). Parameres sclerotized with rugose, medially broad and rounded, apex blunt, outer margin serrated and setose apically, inner margin moderately concave ( Fig 12E).

Geographical distribution: India (Assam and Arunachal Pradesh), Indonesia, and Sri Lanka [ 24, 27, 42, 44].

Remarks: Presence of this species in India was mentioned by Lis [ 24] without giving any illustrations.