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

publication ID

https://doi.org/10.5281/zenodo.5405025

persistent identifier

https://treatment.plazi.org/id/87228798-FF9A-6C46-6EDC-F9D9FD4FFB94

treatment provided by

Felipe

scientific name

Dysmerus impolitus Thomas
status

new species

Dysmerus impolitus Thomas , new species

Fig. 13 View Figure 13-15 , 37 View Figure 35-37 , 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 View Figure 13-15 ); integument dull, strongly microreticulate; inconspicuous dorsal pubescence, and in the male, scape simple, strongly curved ( Fig. 13 View Figure 13-15 ).

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 View Figure 13-15 ), 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 View Figure 35-37 .

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” GoogleMaps .

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).

NMPC

National Museum Prague

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

DEFS

Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Laemophloeidae

Genus

Dysmerus