Semiardistomis semipunctatus (Dejean, 1831)

Valdes, Pavel, 2012, Notes about morphological features of the Western Hemisphere subtribe Ardistomina, and revision of genus Semiardistomis Kult (Coleoptera, Carabidae, Scaritinae, Clivinini), ZooKeys 210, pp. 19-67 : 48-49

Semiardistomis semipunctatus (Dejean, 1831) Fig. 58

Clivina semipunctata Dejean, 1831: 509.

Ardistomis semipunctata (Dejean): Putzeys 1846: 648.

Ardistomus semipunctatus (Dejean): Csiki 1927: 549; Blackwelder 1944: 27.

Ardistomis semipunctatus (Dejean): Lorenz 2005: 146.

Ardistomis (Semiardistomis) semipunctatus (Dejean): Kult 1950: 316.

Semiardistomis semipunctata (Dejean); Erwin 2011: 238.

Type material.

Lectotype, here designated, at MHNP, pinned, labeled: green paper handwritten "Buenos Ayres Lacordaire"/ handwritten " 24"/ "Lectotype Clivina pallipes Dej. Des. S.W. Nichols 1984"/ printed on red paper “Lectotype”.

Type locality.

Given by Dejean (1831: 509) as "parties méridionales de Brésil et dans les environs de Buenos Ayres", Brazil and Argentina.

Diagnosis.

Body piceous with green bluish reflections. Elytral surface completely smooth, striae continuously impressed in basal 1/8, without or with few punctures, 3 setiferous pores on interval 3. Abdominal sternum VII with 4+4 setiferous punctures.

Measurements and variation.

Variation of measurements (mm) and ratios for Semiardistomis semipunctatus (n=18) are: HL = 0,46-0,58-0,65; PL 0,93-1,07-1,16; PW 0,95-1,14-1,28; EL 2,25-2,78-3,06; EW 1,38-1,69-1,88; SBL 3,70-4,43-4,86; PW/EW 0,68; PW/PL 1,07; PL/EL 0,39; EW/EL 0,61.

Morphological variation is observed in the elytral punctures. In three different samples from Sta Catarina, Nova Teutonia, Brazil, exemplars with this form are mixed with exemplars of Semiardistomis deletus together with intermediate forms.

Geographical distribution

( Fig. 58 ). The known range of this species is confined to a South American area south of the Tropic of Capricorn, extending from southeastern Brazil westward to western Argentina, and south to southern Uruguay.

Material examined.

ARGENTINA. Buenos Aires Delta Parana Jan 1943 (IRSNB, 2). BRAZIL. Campos (HECO, 2); Nova Teutonia (IRSNB, 16); Nova Teutona Sta Catarina Nov 1955 (MHNP, 8); Sta Catarina Nov 1970 (USNM, 21). URUGUAY. Montevideo (IRSNB, 4).

Figures

Figure 58. Distribution map, illustrations of exemplar left elytra, and variability of members of the labialis species-group in South America. Value inside symbol indicates portion of basal elytra in which striae are impressed, (C, complete impressed). Scale bar 1 mm.