Semiclivina (Uroclivina), Dostal, Alexander, 2011

Dostal, Alexander, 2011, Taxonomic remarks about Semiclivina (Kult, 1947) new status, with description of Uroclivina subgen. n., and of two new species from South America (Coleoptera, Carabidae, Scaritinae, Clivinini), ZooKeys 132, pp. 33-50 : 36-37

Subgenus Uroclivina subgen. n.

Type species.

Semiclivina bergeri sp. n., herewith by original designation; it is the most abundant species of this subgenus.

Etymology.

combination from the genus-name " Clivina " and the specific epithet “urophthalma”.

Recognition.

the species of this subgenus are characterized by the denticle of the posterior margin of the eye, the corresponding incision in the anterior margin of the pronotum at anterior angle and the sculptured band (stridulation organ) on the proepisterna, the latter is the most obvious character of the genus Semiclivina .

Description.

Head: clypeus middle part slightly produced, separated from wings, anterior margin slightly concave, clypeus posteriorly separated from frons by a transverse furrow; posterior margin of eye with an acute dentiform tubercle (Fig. 3a); antennal scape distally with a seta, antennomeres 1 and 2 without pubescence, antennomeres 3 to 11 densely pubescent and longer than wide; labrum 7-setose; penultimate palpomere of labial palpus bisetose. Pronotum: with a marginal seta at the end of the anterior fifth and a second one at hind angle; basal border fine, just above the peduncle, finely bordered between basis and hind angle, and from hind angle to markedly produced anterior angles, border in the anterior third broader, anterior margin with a sharp, narrow incision just beneath the front angles, corresponding with the tubercle at hind margin of eye (Fig. 3b); middle furrow and front transverse furrow clearly impressed; proepisterna with a stridulation band. Elytra: scutellar puncture present, scutellar striole indistinct, marked as short furrow just beneath the suture, or not evident; elytral striae 1 to 5 free at base, means within the humeral denticle and suture; basis at the end of interval 1 to 5 sometimes with flat tubercles, which may join with transverse basal keel; elytral intervals distinctly punctured; interval 3 with 5 setiferous punctures. Legs: front femur with a sharp longitudinal stridulation ridge, just above the distal part of the lower inner edge of the profemur; mesotibia with a small distal spur. Abdomen: abdominal sterna IV to VI with a paramedian seta on each side, sterna V to VII with a basal transversal ridge; abdominal sternum VII with a pair of marginal setae on each side relatively close together, all abdominal sterna microsculptured.

Geographical distribution.

The species are restricted to South America, ranging from French Guyana, southward through the Amazon Basin to southern Brazil, Paraguay, North and Central Argentina and most likely also Uruguay (no evidence from this country so far).

Way of life. most specimens of Clivina (sensu lato) usually live near wet places or in swamps. Some species, like Clivina fossor (Linnaeus, 1758) are not bound to humid habitats. Most of the species are macropterous, capable of flight mostly during night, especially at temperatures above 25°C. Specimens of Uroclivina obviously live also close to humid habitats: they were collected at light and sometimes in extraordinary large series near rivers, lakes or other wet places.

Key to subgenera of Semiclivina and species of the Subgenus Uroclivina