Ennius Stål 1861: 199

Zahid, M. & Ahmad, I., 2011, A revision of Myrocheine genus Ennius Stål with special reference to redescription of E. monteironis Distant (Hemiptera: Pentatomidae: Pentatominae) and their phylogenetic relationships, Pakistan Journal of Zoology 43, No. 3, pp. 549-554 : 550

Ennius Stål 1861: 199 ; 1876: 52, 53; Lethierry and Severin, 1893: 110; Kirkaldy, 1909: 206; Gillon, 1972: 322; Gross, 1975: 220; Linnavuori, 1982: 68, 72.

Paramecocoris (Ennius) Stål, 1865: 112 .

Body of moderate size (8.5 mm -11.4 mm); elongated; generally brown with dark brown punctures; head usually broader than long; paraclypei longer than clypeus and enclosing the clypeus; antennae with basal segment equal or shorter than head apex, second antennal segment longer or slightly longer than third but shorter than fourth; labium reaching or passing beyond middle coxae; pronotum with lateral margin slightly convex, anterior angles slightly toothed or rounded, humeral angles rounded or subrounded; scutellum long and rounded or subrounded at apex; metathoracic scent ostioles small with large peritreme.

Male genitalia

Pygophore as broad as long, quadrangular, lateral lobe prominent and rounded, dorsomedian surface concave or deeply concave, ventromedian surface slightly notched; paramere somewhat Fshaped with curved blade; aedeagus with large conjunctival appendages.

Female genitalia

Posterior margin of first gonocoxae convex; ninth paratergites small but not reaching medially fused posterior margin of eighth paratergites.

Comparative note

This genus appears to form a subclade with Myrochea Amyot and Serville , Dorpius Distant , Stysicoris Ahmad and Kamaluddin and Munshiana Ahmad and Kamaluddin with apomorphies in having antennae with second segment distinctly longer than third in length. It however appears entirely isolated in its subclade in having second antennal segment only slightly longer than third and metathoracic scent complex with peritreme long and anteriorly curved.

Distribution

Ethiopian region.

Type species

Sciocoris ater Dallas 1851 .

KEY TO THE SPECIES OF THE GENUS ENNIUS STÅL

1. Entirely black, lateral lobes of pygophore in ventral view round, not projected posteriad, ventroposterior margin smoothly concave, medially very slightly constricted ............................................. E. ater (Dallas) - More colourful, at least lateral margins of pronotum with narrow and broad ring in middle and hind tibiae pale, lateral lobes of pygophore in ventral view not round as above, ventroposterior margin not smoothly concave as above, medially not constricted ................. 2

2. Lateral margins of pronotum straight, lateral lobes of pygophore in ventral view prominent, hump like, anteriorly directed, ventro-posterior margin strongly sinuate, medially notched, U-shaped, head and membrane of hemelytra in male black, rest of the body above pale ochraceous ... E. neomorio Ahmad and Zahid - Lateral margins of pronotum slightly sinuate, convex or markedly curvate, lateral lobes of pygophore in ventral view not hump like, ventroposterior margin not strongly sinuate, medially not notched, colouration not as above.. ........................................................................................3

3. Lateral margins of pronotum sinuate, lateral margins of head less strongly converging apically, scutellum longer, about 1.42-1.53 x as long as broad, lateral lobes of pygophore in ventral view very slightly projected posteriad, apices conical, ventroposterior margin medially V-shaped, posteromedian lobes on either side dorsally prominent, also clearly visible in lateral aspect. .............................................................. E. morio (Dallas) - Lateral margins of pronotum curvate or strongly so, lateral margins of head, strongly converging apically from base, scutellum shorter 1.33 x as long as broad, lateral margins of pygophore medially in ventral view constricted, apically much broader, median lobes on either, side apically much smaller, not prominent laterally ..........................................................................4

4. Larger species, more than 11.0 mm in length lateral margins of pronotum much prominently curvate and narrowly lamellate, sides of venter strongly coarsely punctate ......................................... E. longulus (Germar) - Small species, much less than 11.0 mm in length lateral margins of pronotum curvate but not prominently as above, sides broadly lamellate, sides of venter coarsely punctate but not as strongly as above .............................. ..................................................... E. monteironis Distant