Cycreon sculpturatus Orchymont, 1919

Arriaga-Varela, Emmanuel, Wong, Sin Yeng, Kirejtshuk, Alexander & Fikacek, Martin, 2018, Review of the flower-inhabiting water scavenger beetle genus Cycreon (Coleoptera, Hydrophilidae), with descriptions of new species and comments on its biology, Deutsche Entomologische Zeitschrift 65 (1), pp. 99-115 : 103

Cycreon sculpturatus Orchymont, 1919 Fig. 5 O–R

Cycreon sculpturatus Orchymont, 1919: 121.

Cycreon sculpturatus : Shatrovskiy (2017: 589, redescription).

Type locality.

Indonesia: South Sumatra: Palembang [ca. 2.9861°S, 104.7555°E].

Material examined.

None (information adopted from Shatrovskiy 2017).

Diagnosis.

Cycreon sculpturatus can be distinguished from other species of the genus by the deeply incised clypeus, pronotum densely covered with complete ring-like impressions (punctures) and straight meso- and metatibiae.

Addition to description.

Body 2.6 mm long; colouration light reddish-brown, with slightly darker head and elytra; clypeus about 2.5 × as wide as long, with anterior margin conspicuously emarginate medially (Fig. 5O); frons and clypeus with punctation composed of complete circular impressions (punctures); mentum (Fig. 5P) subtrapezoid, widest at posterior fifth, about 2.0 × wider than long, anteromedian emargination reaching about 0.2 × the mentum length; pronotum with dense and moderately deep punctation consisting of complete circular impressions with a small setiferous puncture in posterior part (Fig. 5Q), punctation of approximately same diameter and density all over pronotum; meso- and metatibiae straight (Fig. 5R); male genitalia unknown (because male remains unknown for this species).

Distribution.

Only know by a single female specimen from the type locality (Indonesia, Sumatra, Palembang) (Fig. 7).

Remark.

According to Shatrovskiy (2017) the proportions of the clypeus were given as 4 × as long as wide, however, the picture in the paper ( Shatrovskiy 2017: 591) shows that the ratio is about 2.5 ×.