Leprosoma, Baerensprung, 1859

Gapon, D. A., 2010, Taxonomic notes on the genus Leprosoma (Heteroptera: Pentatomidae), Zoosystematica Rossica (China) 19 (2), pp. 272-276 : 275-276

Key to species of genus Leprosoma

1(4). Body without incrustation resembling hoarfrost in texture. Head wider than long. Longitudinal carinae on frons obscure or absent. Humeral angles not incrassate and not separated from pronotal disc by impression. Cicatrices pale. Anterior transverse carina very low, obliterated laterally, often absent or vestigial. Scutellum broad, 0.58–0.65 times as wide as long; tubercles at its base small, rounded ( L. inconspicuum species group).

2(3). Tubercles in anterior portion of pronotum small. Connexivum thin (in strictly lateral view), its laterotergites smooth, with very fine punctation. Tubercles on posterior angles of abdominal segments very small... Leprosoma inconspicuum Baerensprung, 1859

3(2). Tubercles in anterior portion of pronotum large. Connexivum thicker (in strictly lateral view), its laterotergites with rough punctation and transverse elevation, sometimes strongly smoothed. Tubercles on posterior angles of abdominal segments usually rather large.......................................... Leprosoma stali Douglas & Scott, 1868

4(1). Body covered with incrustation resembling hoarfrost in texture. Head as long as wide. Longitudinal carinae on frons distinct. Humeral angles incrassate, separated from pronotal disc by impression. Cicatrices black. Anterior transverse carina high. Scutellum rather narrow, 0.50–0.57 times as wide as long, tubercles at its base large, clearly longitudinal ( L. reticulatum species group).

5(10). Humeral angles long, strongly projecting beyond lateral margins of hemelytra.

6 (9). Body length 5.25–6.55 mm. Posterior pronotal transversal carina strongly and smoothly curved. Elevations on connexival laterotergites moderately convex, tubercles on posterior angles of abdominal segments moderately large. Medial part of spermathecal duct long, extending beyond anterior margin of abdominal sternum V.

7(8). Humeral angles broadly or rectangular rounded, directed laterad. Pronotal transverse carinae distinct. Ventral infolding of rim of pygophore very long, perpendicular to ventral wall of pygophore........................... Leprosoma tuberculatum (in part)

8(7). Humeral angles shaped like horns curved forward. Pronotal transverse carinae obsolete and masked by incrustation. Ventral infolding of rim of pygophore very short and slightly elevated.......................................... Leprosoma tenuimarginatum

9(6). Body length 6.00–6.80. Posterior pronotal carina weakly and sharply curved. Elevations on connexival laterotergites strongly convex, tubercles in posterior corners of abdominal segments very large. Ventral infolding of rim of pygophore very long ( Fig. 5). Medial part of spermathecal duct as long as abdominal sternum VI or slightly extending beyond its anterior margin........ Leprosoma olcesii

10(5). Humeral angles short, slightly projecting beyond lateral margins of hemelytra.

11(12). Ventral infolding of rim of pygophore very long (as in Fig. 5). Medial part of spermathecal duct long, extending beyond anterior margin of abdominal sternum V. (Russia, Turkey, Transcaucasia, Central Asia and China).... Leprosoma tuberculatum (in part)

12(13). Ventral infolding of rim of pygophore short ( Fig. 1). Medial part of spermathecal duct short, slightly extending beyond anterior margin of abdominal sternum VI. (North Africa, Israel, Syria, Iran, Afghanistan)........................ Leprosoma reticulatum