Semiardistomis viridis ( Say, 1823 )

Bousquet, Yves, 2006, Review of the species of Ardistomina (Coleoptera: Carabidae: Clivinini) in America north of Mexico, Zootaxa 1308, pp. 1-29 : 10-11

Semiardistomis viridis ( Say, 1823)

( Figs 2 , 5 , 12, 16 , 20 , 26 , 29 , 32 )

Clivina viridis Say 1823: 21 . Type locality: Philadelphia Neck, Pennsylvania, U.S.A. [neotype label].

Clivina rostrata Dejean 1825: 419 . Type locality: "Amérique septentrionale". Synonymy established by LeConte (1857: 80).

Ardistomis vicina Putzeys 1846: 647 . Type locality: "Amérique boréale". Synonymy established by LeConte (1857: 80).

Ardistomis rostrata: Putzeys (1846: 647) .

Ardistomis viridis: LeConte (1857: 80) ; LeConte (1879: 32); Blatchley (1910: 63); Downie and Arnett (1996: 111).

Semiardistomis viridis: Nichols (1988a: 187, 195); Ciegler (2000: 43).

Type Material. Say's original specimens of Clivina viridis have been destroyed. I have seen the specimen (ɗ) selected by Lindroth and Freitag (1969: 334) for neotype in the MCZ. It is labelled "PhilaNeck 5.10 Pa / Liebeck Collection/ Neotypus Clivina viridis Say design. Lth. / Ardistomis viridis Say det. Lindroth 68 / M.C.Z. Neotype 33077/ Semiardistomis viridis (Say) det. S.W. Nichols 1986".

Dejean originally described Clivina rostrata from an unspecified number of specimens. One specimen in MHNP is labelled " rostrata Dej. [handwritten]/ Ex Musaeo Chaudoir/ Lectotype Clivina rostrata Dejean des. S.W. Nichols 1984" (fide Nichols 1988a: 197). The lectotype designation is hereby published. This species was not surveyed by Lindroth (1955), who reported on Dejean's types of North American Carabidae .

Putzeys originally described Ardistomis vicina from three specimens, two from Dejean's collection and one from Buquet's collection. One specimen in MHNP is labelled "Leconte [handwritten]/ 34 [handwritten]/ vicina Putz. [handwritten]/ Lectotype Ardistomis vicinus Putz. des. S.W. Nichols 1984" (fide Nichols 1988a: 197). The lectotype designation is hereby published.

Diagnosis. Most readily separated from S. puncticollis by the presence of only two supraorbital setae near each eye and absence of discal setae from the pronotum.

Description. Color: Upper surface black with blue­green lustre and shiny, without microsculpture; antennae dark reddish­brown; palpi paler, yellowish; legs reddish­brown. Head: Eyes markedly globulose. Frons with two supraorbital setae on each side. Mentum tooth cariniform; setae behind tooth approximate. Prothorax: Pronotum with six to eight lateral setae; disc without setae; lateral bead erased in basal third. Prosternal apophysis with few setae in most specimens. Elytra: Sutural stria deeply impressed, remaining striae shallowly impressed, coarsely punctate, each puncture bearing seta; striae 2 and 4 with few setae especially in apical half of elytra. Lateral margin prolonged in form of carina from basal extremity to base of stria 3. Male Genitalia: Median lobe well curved in lateral view ( Fig.5 a), parameres each with four apical setae ( Fig. 5 b). Female Genitalia: Apical stylomere markedly narrow ( Fig. 12 ); seminal tube of spermatheca relatively wide in basal half, markedly narrow, filiform in apical half ( Fig. 16 ).

Body length: 5.0–6.5 mm.

Geographical Distribution. This species occurs over eastern United States, from the southern tip of New York to Indiana, south to northeastern Mexico, Florida (not yet recorded from the Keys), and the Bahama Islands ( Fig. 32 ).

Habitat. Nichols (1988a: 199) reported this species to be common along sandy banks at Lake Anne, Florida. Erwin (1981: 141) reported it as common on wet silt on Plummers Island, Maryland. Downie and Arnett (1996: 112) stated that members of this species are frequent along banks of streams.

Figures

FIGURE 32. Collection localities for Semiardistomis viridis (Say) in United States of America.

FIGURES 2 – 3. Habitus (dorsal view). 2, Semiardistomis viridis (Say); 3, Ardistomis obliquatus Putzeys. Scale bar = 1 mm.

FIGURES 4 – 8. Median lobe (a) and paremeres (b). 4, Aspidoglossa subangulata; 5, Semiardistomis viridis; 6, S. puncticollis; 7, Ardistomis schaumii; 8, A. obliquatus.

FIGURES 11 – 18. 11 – 14. Apical stylomere. 11, Aspidoglossa subangulata; 12, Semiardistomis viridis; 13, Ardistomis schaumii; 14, A. obliquatus. 15 – 18. Spermatheca. 15, Aspidoglossa subangulata; 16, Semiardistomis viridis; 17, S. puncticollis; 18, Ardistomis schaumii.

FIGURES 19 – 22. 19 – 21. Head (dorsal view). 19, Aspidoglossa subangulata; 20, Semiardistomis viridis; 21, Ardistomis schaumii. 22, Extremity of body (lateral view) of Ardistomis schaumii. Scale bar = 0.2 mm (Figs 20 – 22), 0.5 mm (Fig. 19).

FIGURES 23 – 26. 23 – 24. Protarsomeres (ventral view). 23, Aspidoglossa subangulata ɗ; 24, Aspidoglossa subangulata Ψ. 25 – 26. Humeral region (dorsal view). 25, Aspidoglossa subangulata; 26, Semiardistomis viridis. Scale bar = 0.2 mm.

FIGURES 27 – 30. 27, Prosternum of Ardistomis schaumii. 28 – 30. Protibia (ventral view). 28, Aspidoglossa subangulata; 29, Semiardistomis viridis; 30, Ardistomis schaumii. Scale bar = 0.2 mm.