Dysmerus symphilus Thomas, 2009

Thomas, Michael C., 2009, A review of the genus Dysmerus Casey (Coleoptera: Laemophloeidae), Insecta Mundi 2009 (74), pp. 1-30 : 24-28

Dysmerus symphilus Thomas , new species

Fig. 20 , 42, Map 6

Diagnosis. Individuals can be distinguished from other members of the genus by a combination of the following character states: antennae moniliform and thickened; clypeus longitudinally carinate laterally, the carinae extending onto the frons ( Fig. 20 ); pronotum with two sublateral lines on each side ( Fig. 20 ); dorsal pubescence inconspicuous.

Description. Holotype male, deposited in, with the following label data: “ BRAZIL: Rondonia 62 km. SW Ariquemes, nr. Fzda. Rancho Grande 18-IX-1992 U. Schmitz blacklight trap”

Body elongate, parallel-sided, convex; length, 2.12mm.

Head 1.60X wider than long; sparsely punctate, each puncture subtending a short, inconspicuous seta so that the surface appears glabrous; punctures longitudinally elliptical, smaller than an eye facet, separated by 2 or more puncture diameters, surface between punctures smooth and shining; clypeus Map 5. Distribution of Dysmerus species.

prolonged, comprising 0.47 of total length of head measured along midline from front of eyes to front of head capsule, deeply emarginate, sides strongly reflexed; angle above antennal insertion obtuse, strongly elevated; a short oblique carina extending from antennal insertion toward midline; antennal scape large, length equal to 0.73 length of head; from dorsal view curved inwards, deeply emarginate at about midpoint, with a small sharp process at base of emargination; in lateral view roughly triangular; pedicel small, transverse; antennomeres III-X very transverse, about equal in length, and tightly articulated; antennomere XI slightly longer and conical; eye moderately, evenly convex, about 0.40 length of head.

Pronotum very slightly (1.04X) longer than wide; surface sculpture and pubescence as head, but punctures noticeably larger, roughly rectangular in shape, broadest at apex, thence narrowing slightly to base; width across anterior angles 1.14X width across posterior angles; a secondary longitudinal carinate line situated about halfway between sublateral line and lateral margin, extending about 0.67 length of pronotum; sides steeply descending from sublateral line to margin; anterior angles acute, triangularly produced anterolaterally; posterior angles right, not produced.

Elytra 2.0X longer than combined width; parallel-sided for basal half, then gradually converging; all three cells visible, lateral margin of third cell slightly more prominent than others but scarcely carinate; sides laterally perpendicular to margin.

Male genitalia as in Fig. 42.

Female, allotype, deposited in FSCA, with the following label data: “ BRAZIL: Rondonia 62km. SW Ariquemes Fzda. Rancho Grande, 10-XI-1994 C.W.O’Brien blacklight trap ”. It resembles the male, possessing both longitudinal carinae extending from the antennal insertions onto the frons and the secondary lateral lines. It differs from the male primarily in possessing a simple, globular scape. Length 2.10mm ; head across eyes 1.77X wider than long; pronotum 1.04X longer than wide.

Type material. Paratypes, 34, as follows: 3, “ BOLIVIA: Santa Cruz, 3.7km SSE Buena Vista, Hotel Flora & Fauna 405m. 5-15-XI-2001 17 o 29.949’S, 63 o 33.152’W M.C. Thomas & B.K. Dozier tropical transition forest” ( FSCA) ; 1, “ BRAZIL: Rondonia, 62km SW Ariquemes, nr Fzda. Rancho Grande 1-X-1994 U. Schmitz blacklight trap ” ( FSCA) ; 1, “ BRAZIL: Rondonia 62 km. SW Ariquemes, nr. Fzda. Rancho Grande 18-IX-1992 U. Schmitz blacklight trap ” ( FSCA) ; 3, “ BRAZIL: Rondonia, 62km SW Ariquemes, nr Fzda. Rancho Grande 10-XI-1994 C.W. O’Brien blacklight trap ” ( FSCA) ; 1, “ BRAZIL: Rondonia, 62km SW Ariquemes, nr Fzda. Rancho Grande 8-20-XI-1994 J.E.Eger, L.B.&C.W. O’Brien blacklight trap ” ( FSCA) ; 2, “ COSTA RICA: Limon Reventazon , Hamburg Farm XI:1:1927 leg. F. Nevermann /at light/ FMNH ( HD) 27-2/Field Mus. Nat. Hist. 1966 A. Bierig Colln. Acc. Z-13812" ( FMHN) ; 2, “ Costa Rica F. Nevermann 8 V 25/am licht/ Dysmerus brevicornis nsp. Nev.” ( USNM) ; 1, “ Costa Rica F. Nevermann 24 XI 35/am licht” ( USNM) ; 1, “ Costa Rica F. Nevermann 15 X 23/an welkem Laub” ( USNM) ; 1, “ Costa Rica F. Nevermann 1 VIII 24/am licht” ( USNM) ; 2, “ COSTA RICA: Heredia: OTS LaSelva Field Sta., Puerto Viejo de Sarapiqui, Rio Puerto Viejo ; 5-11:III:1973/ 10 o 26’N, 83 o 59’W; leg. J. Wagner & J. Kethley /at light” ( FMNH) ; 3, “FRENCH GUIANA: Amazon Nature Lodge on Kaw Rd. , 2-8-VI-2005, J.E. Eger & M.T. Messenger, coll./ N04 o 33.570' W052 o 12.433' 300m UV Trap ” ( FSCA) ; 1, “ HONDURAS: Atlantida PN Pico Bonito El Portrillo , 28 June 2001 R. Turnbow ” ( RHTC) ; 1, “CANAL ZONE, Barro Colorado Is. , UV trap 1 (3m. high) 18June1977 H. Wolda ” ( USNM) ; 1, “ PANAMA: Chiriqui Puerto Armuelles 7-I-1983 Linda Stephens” ( FSCA) ; 1, “ PANAMA: Canal Zone Barro Colorado Is. 24 May 1977 /H. Wolda Project Light Traps Nivel SMI” ( USNM) ; 1, “ PANAMA: Prov. Chiriqui Puerto Armuelles 27-XII-1982 L. Stephens ” ( FSCA) ; 1, “ TRINIDAD: Simla, Arima-Blachissuese Rd. , 17-VII-75 J. Price blacklight trap ” ( FSCA) ; 2, “ TRINIDAD: Simla, Arima- Blachissuese Rd. , 13-VII-75 J. Price blacklight trap ” ( FSCA) ; 2, “ TRINIDAD: Simla, Arima-Blachissuese Rd. , 11-VII-75 J. Price blacklight trap ” ( FSCA) ; 1, “ TRINIDAD: Simla, Arima-Blachissuese Rd. , 1-VIII-75 J. Price blacklight trap ” ( FSCA) ; 1, “ TRINIDAD: Simla, Arima-Blachissuese Rd. , 25-VII-75 J. Price blacklight trap ” ( FSCA) ; 1, “ TRINIDAD: St. George Co. CIBC, Curepe 6-IX-78 R. M. Baranowski blacklight trap ” ( FSCA) .

Variation. Length of paratypes, 1.74mm - 2.12mm. The degree of development of the scape varies slightly, as does the acuteness of the angle above the antennal insertions.

Map 6. Distribution of Dysmerus species. Etymology. The specific epithet refers to the structure of the antennae, which resemble the antennae of certain beetle symphiles of social insects.

Distribution. Costa Rica south to Bolivia and east to Trinidad (Map 6).

Figures

Figure 19-21. Head and pronotum of males of Dysmerus: 19) D. sulcicollis Grouvelle; 20) D. symphilus Thomas, n. sp.; 21) D. trinidadensis Thomas, n. sp.