Dysmerus impolitus Thomas, 2009

Thomas, Michael C., 2009, A review of the genus Dysmerus Casey (Coleoptera: Laemophloeidae), Insecta Mundi 2009 (74), pp. 1-30 : 15-17

Dysmerus impolitus Thomas , new species

Fig. 13 , 37 , Map 4

Diagnosis. Individuals can be distinguished from other members of the genus by a combination of the following character states: head with short median carina ( Fig. 13 ); integument dull, strongly microreticulate; inconspicuous dorsal pubescence, and in the male, scape simple, strongly curved ( Fig. 13 ).

Description. Holotype, male, in NMPC, with label data as follows: “REPRESSA RIO GRANDE, GB BRASIL, 6.66 ALVARENGA”/”coll. Marek P5p-05/74”.

Body elongate, parallel-sided, convex; length, 1.76 mm.

Head 2.00X wider than long; punctures shallowly impressed, longitudinally elliptical, smaller than an eye facet, separated by 1-2 or more puncture diameters, sparse medially, denser laterally and basally; each subtending a short, pale seta; surface between punctures dull, microreticulate; a short median longitudinal carina begins just posterior to the antennal insertions and ends at about the midpoint of the eye; clypeus prolonged, comprising 0.26 of total length of head measured along midline from front of eyes to front of head capsule, shallowly emarginate, sides not reflexed; angle above antennal insertion obtuse, strongly elevated; antennal scape large, length equal to 0.60 length of head; from dorsal view strongly curved medially, apical portion of scape flattened laterally and distally rounded ( Fig. 13 ), dorsally without a dark tubercle; pedicel small, quadrate; antennomeres III-VIII quadrate, about equal in length; antennomeres IX-X broader and longer; XI longer than X; eye moderately, evenly convex, about 0.42 length of head.

Pronotum slightly wider than long (1.09:1.00); surface sculpture and pubescence as head; roughly rectangular in shape, broadest just behind apex, thence narrowing slightly to base; width across anterior angles 1.05X width across posterior angles; sides steeply descending from sublateral line to margin; anterior angles right, not produced; posterior angles right, not produced.

Elytra 2.04X longer than combined width; parallel-sided for basal half, then gradually converging; lateral margin of third cell slightly more prominent than others but scarcely carinate; sides laterally perpendicular to margin.

Male genitalia as in Fig. 37 .

Female, allotype, in NMPC, length, 1.86 mm., with label data as follows: “REPRESSA RIO GRANDE, GB BRASIL, 8.66 ALVARENGA”/”coll. Marek P 5p-05/74”. Proportions as follow: head, 2.23X wider than long ; clypeus 0.28 length of head; eye, 0.67 length of head; pronotum as wide as long, 1.09X as wide apically as posteriorly; elytra 2.07X longer than wide. All else as in male except for the simple scape .

Type material. Paratypes, 44 as follows: 1,

“ BRAZIL: Rondonia, 62km SW Ariquemes, nr Fzda.

Rancho Grande 27-1V-1992 U. Schmitz blacklight

trap” ( FSCA); 2, “ BRAZIL: State of Minas Gerais ,

Cordisburgo Gruta de Maquine 20-I-1979 R.E.

Woodruff blacklight trap” ( FSCA); (the following

each has a second label reading: “coll. Marek P5p-

05/74") 1, “REPRESSA RIO GRANDE, GB

BRASIL, 5.66 AVARENGA” ( FSCA, NMPC); 2, “R.

Janeiro GB, Brasil 3.72 Alvarenga” ( NMPC); 7,

“REPRESSA RIO GRANDE, GB BRASIL, 8.66

ALVARENGA” ( NMPC); 7, “REPRESSA RIO

GRANDE, GB BRASIL, 6.66 ALVARENGA”

( FSCA, NMPC); 18, “RIO D. JANEIRO GB BRAS.,

7.66 ALVARENGA” ( DEFS, FSCA, NMPC); 1,

“REPRESSA RIO GRANDE, GB BRASIL, 6.67

OLIVEIRA” ( FSCA); 1, “FZDR. TIJUCA

GUANABARA ALVARENGA 5.66" ( NMPC); 2,

“REPRESSA RIO GRANDE, GB BRASIL, 10.67 Figure 41-42. Male genitalia of species of Dysmerus : 41) OLIVEIRA” ( NMPC); 4, “REPRESSA RIO D. sulcicollis (Grouvelle) ; 42) D. symphilus Thomas , n. sp. GRANDE, GB BRASIL, 9.72 OLIVEIRA” ( DEFS,

FSCA, NMPC); 1, “ PARAGUAY: Itatpua Yatai , prop. Hostettler family San Rafael Prserve 26 o 38’17"S, 55 o 39’50"W 21 NOV 2000; Z. Falin PAR1F00 018 ex: UV light” .

Variation. The paratypes range in length from 1.34 mm to 1.88 mm. Otherwise, they are very similar to the holotype.

Etymology. The specific epithet refers to the non-glossy integument of this species,

Distribution. Brazil, Paraguay (Map 4).

Figures

Figure 13-15. Head and pronotum of males of Dysmerus: 13) D. impolitus Thomas, n. sp.; 14) D. mexicanus Thomas, n. sp.; 15) D. monstrosus Thomas, n. sp.

Figure 35-37. Male genitalia of species of Dysmerus: 35) D. genaspinosus Thomas, n. sp.; 36) D. hamaticornis Thomas, n. sp.; 37) D. impolitus Thomas, n. sp.