Paragrilus impressus (Chevrolat)

Hespenheide, Henry A., 2002, A review of North and Central American Paragrilus Saunders, 1871 (Coleoptera: Buprestidae: Agrilinae), Zootaxa 43, pp. 1-28 : 13-14

Paragrilus impressus (Chevrolat)

( Figs. 8 , 26 )

Aphanisticus impressus Chevrolat, 1835 : no. 145.

Paragrilus impressus (Chevrolat) , Waterhouse, 1889: 124. Agrilus impressus (Chevrolat) , Saunders, 1871: 116.

Diagnosis: Agriliform, flattened above, black throughout, head with golden reflections, pronotum golden on anterior half, reddish on posterior half, elytra with blue or purple reflections; 4.85­5.8 mm long. Head with front convex, narrowly impressed along midline on upper 2/3 above larger rounded fovea; epistoma somewhat depressed between antennal insertions, ventral margin distinctly produced, quadrate, emarginate, angles very acute; surface finely punctate, indistinctly shagreened. Pronotum somewhat flattened, prehumeral callosity small but strongly indicated by broad, deep lateral depressions; prehumeral callosity produced outward and anteriorly to form narrow ridge above and roughly parallel to marginal carina; anterior angles rounded­angulate; disc very strongly depressed along midline at basal margin before scutellum and at base of lateral depressions, surface coarsely rugose on basal half, less strongly so or obsolete on anterior half, shagreened. Elytra with posthumeral carina extending as far beyond hind coxae as before, surface finely rugose, with intervals faintly raised; apices broad, rounded­subquadrate, inner angle longer. Posterior angles of hind coxae rounded­subquadrate, depressed. Anterior process of first abdominal segment with very short carina posterior to hind coxae. Male genitalia dark reddish brown, with transparent tips to lateral lobes ( Fig. 26 ).

Type: “ Type./impressa Chevr./Saunders., 74.18.” (BMNH).

Specimens examined: México: Veracruz, 2 mi N Tlacotalpan, 2.VII.1971, Clark, Murray, Hart, Schaffner (TAMU), El Higo, 26.VI.1976, Zaragoza (RLWE); Lake Catemaco, 8­ 16.VIII.1960, H.F. Howden (CNCI), 10 mi W Pozo Rica, 11.VI.1955, D. Giuliani (CASC); Oaxaca, Temescal, 90 m, 24.VI.1983, M. Kualbars (CHAH, RLWE), 7 mi N Matias Romero, 500’, 2.VIII.1974, C.W. & L.B. O’Brien & G.B. Marshall (CLBC), 4 mi N Matias Romero, 500’, 27.VI.1971, C.W. & L.B. O’Brien & G.B. Marshall (RLWE); Quintana Roo, Leona Vicario, 5.VI.1992, F.T. Hovore (CHAH). Belize: Cayo, Chiquibul Rd, 38 mi S jct w Cristo Rey, 570 m, 26.VI.1992, J. Rifkind, P. Gum (CLBC).

Host: Unknown.

Discussion: This is one of four narrowly distributed species in the trifoveolatus group. It is closely related to trifoveolatus but differs consistently in the nature of the pronotum and the very different genitalia.

Figures

FIGURES 7 ­ 12. North and Central American Paragrilus, dorsal view ­ P. trifoveolatus group ­ 7. P. tenuis (LeConte); 8. P. impressus (Chevrolat); 9. P. angulaticollis Waterhouse; 10. P. laevicollis Waterhouse; 11. P. azureus n. sp.; 12. P. trifoveolatus Waterhouse.

FIGURES 19 ­ 34. North and Central American Paragrilus, dorsal and lateral views of aedeagi ­ P. rugatulus group ­ 19. P. lesueuri Waterhouse; 20. P. vicinus Waterhouse; 21. P. transitorius Waterhouse; 22. P. exiguus (Chevrolat); 23. P. modicus (Solier); 24. P. rugatulus Thomson; P. trifoveolatus group ­ 25. P. tenuis (LeConte); 26. P. impressus (Chevrolat); 27. P. azureus n. sp.; 28. P. trifoveolatus Waterhouse; 29. P. fallorum n. sp.; P. aeraticollis group ­ 30. P. aeraticollis Waterhouse; 31. P. akersorum n. sp.; 32. P. burkei n. sp.; 33. P. heliocarpi n. sp.; 34. P. moldenkei n. sp.