A New Species of the Beetle Genus Brachypsectra from the Dominican Republic, with Fossil Connections (Coleoptera: Brachypsectridae)
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University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida 12-1-2002 A new species of the beetle genus Brachypsectra from the Dominican Republic, with fossil connections (Coleoptera: Brachypsectridae) Robert E. Woodruff Florida state Collection of Arthropods, Bureau of Entomology, Division of Plant Industry, Florida Department of Agriculture & Consumer Services, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Part of the Entomology Commons Woodruff, Robert E., "A new species of the beetle genus Brachypsectra from the Dominican Republic, with fossil connections (Coleoptera: Brachypsectridae)" (2002). Insecta Mundi. 549. https://digitalcommons.unl.edu/insectamundi/549 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. INSECTA MUNDI, Vol. 16, No. 4, December, 2002 161 A new species of the beetle genus Brachypsectra from the Dominican Republic, with fossil connections (Coleoptera: Brachypsectridae) Robert E. Woodruff Florida State Collection of Arthropods Florida Department ofAgriculture and Consumer Services P.O. Box 147100 Gainesville, Florida 32614-7100 ABSTRACT. With the descriptionof Brachypsectra viva,fosile n. sp., from the Cabo Rojo desert area of Hispaniola, the beetle family Brachypsectridae now contains 4 described species. The family was originally known from the Dominican Republic by Miocene amber fossils of larvae. Genitalia are illustrated for the first time for the family. Relationships of the family within the Elateroidea are briefly discussed. Introduction Head (Fig. 1,2,7,8). Visible from above; short, broad, with central depression, slightly carinate above The family Brachypsectridae has been an enig- eyes; surface moderately punctate. Clypeal suture matic one since discovery and description of the first moderately impressed (Fig. 7,8). Antennae (Fig. 3,7) species, Brachypsectra fz~lua(LeConte 1874). Origi- 11 segmented, antennomeres 4-10 serrate to nearly nally described in the family Dascillidae, it was placed pectinate; terminal antennomere ovoid. Antenna1 in a new family Brachypsectridae by Horn (1881). base inserted under narrowed frons in depression in Although larvae had been collected as early as 1892 front of the eyes. Head vestiture consisting of re- (Anonymous, 1908), they were not recognized or curved setae, forwardprojecting, nearly evenly spaced associated with adults until nearly 40 years later. (about 0.75 distance of setallength). Mouthparts (Fig. Blair (1930) described 2 new species ofBrachypsectra 3) inconspicuous from above; labrum small, oval; from India and Singapore, based partly on specimens mandibles compact, blunt, densely punctate atbase, reared from larvae collected from beneath tamarind not projecting; maxillary palpi extending beyond bark. This association confirmed the unique body clypeus (Fig. 7-8), apicalsegment elongate (2.5 times form of these strange larvae. The following year, length of previous segment) and acute. Labial and Boving and Craighead (1931) described and illustrat- maxillary palpi bright yellow in contrast to darker ed the larva ofB. fulvaLeConte. These were actually mandibles and remainder of venter. Eyes large, no- mentioned much earlier (but not identified) by Barber ticeable from above, nearly round. (1905). Pronoturn (Fig. 1). Convex, broader than long, generally trapezoidal in outline, with front narrower. Brachypsectra vivafosile Woodruff, Posterior angles projecting (as in Elateridae), basally new species accompanied by an angular, slightly curved, carinate ridge for nearly one third pronotal length. Basal line Holotype male: Dominican Republic: Province of or depression not evident; outline undulating, with Pedernales, Cabo Rojo, Alcoa Headquarters, 3-VII- noticeable broad indentation at scutellum. Lateral 1998, R.E. Woodruff & R.M. Baranowski, blacklight margins complete, sharply carinate asin Elateridae. trap. Vestiture similar to head, but varying in direction as Description. General Form (Fig. 1-2). Similar a "cow lick" pattern. Punctures shallow, nearly uni- in nearly all respects to the type of the genus (B. fulva form in size and shape, separated by their diameter or LeConte). Color uniformly chestnut brown. Resem- slightly more. bling members of the family Elateridae, but lacking a Elytra (Fig. 1). Entire, ovoid, widest in posterior well-developed "click" mechanism. Length 4.0mm two thirds; not acuminate. Striae numbering 9, su- (total, including head), width 2mm. Body widest tural one forming continuous groove and connecting behind middle, color uniformly testaceous, with fine, to marginal one. All striae terminating before apex, sparse goldenvestiture. except sutural and marginal. Strialintervalsweakly Volume 16, No. 4, December, 2002, INSECTA MUNDI Figures 1-6. Scanning electron microscope photographs of Brachypsectra vivafosile n. sp., holotype male: 1) Habitus, dorsal view; 2) Habitus, ventral view; 3) Right antenna, ventral view; 4) Male genitalia, lateral view (ventral at top); 5) Male genitalia, dorsal view; 6) Male genitalia, ventral view. convex, more so near humeri, the 7t" weakest in Venter. (Fig. 2, 9,lO). Prosternum relatively anterior 213, intervals punctate as pronotum, from large, nearly as long as broad, forming the typical which arise about 2 rows of setate each. Shoulders "chin piece" below the mouthparts. Intercoxal process prominent, rounded, striae deeper near base. Scutel- well-developed (Fig. S),projectingposteriorly between lum slightly convex, nearly triangular or shield- procoxa, terminating in truncate apex, appearing to shaped, angles rounded, fitting under a central, basal articulate with mesosternalfossa, but not forming the depression of pronotal margin. Vestiture of elytra and so called "click mechanism" of Elateridae (appearance scutellum similar in size to that of head and prono- only, no observation of living beetles). Mesosternum turn; somewhat denser and projecting posteriorly. short, fossa narrow, the sides setate, projecting Epipleural fold prominent, entire, widest and more posteriorly for half the length of the metacoxa; cavi- concave at basal 113. Elytral tips not projecting or ties open behind, separated. Mesosternum (Fig. 2) acuminate, but gently tapering to apex. long and broad, with central line. Posterior margin INSECTA MUNDI, Vol. 16, No. 4, December, 2002 163 Figures 7-12. Scanning electron microscope photographs of Brachypsectra vivafosile n. sp., holotype male: 7) Head, anterior view, showing antenna1 insertions; 8) Mouthparts, anterior view, showing clypeus, mandibles, maxillary palpi; 9) Venter, showing base of legs, procoxae and intercoxal projection, mesocoxae and narrow fossa; 10) Venter, showing posterior legs and abdomen, metacoxae (transverse), trochanter (oval), setation of legs and abdomen; 11) Enlargement of right foretarsus, showing 5 segments and setation; 12) Posterior tarsal claw, ventral view, showing "bull horn" shape and sculpture. diagonal, forming a depression at junction of abdo- spurs absent, vestiture similar throughout (Fig. 10). men, coxae grooved for reception of posterior femora. Tarsi all 5 segmented; claws not cleft, but widely Legs (Fig. 2, 9- 12) long and slender. Femora separated, "bull horn" shaped, with noticeable sculp- broader than tibiae, flattened cylindrical, posterior ture (at high magnification) on each claw (Fig. 12); ones shorter and more convex. Tibiae all narrow, tarsalvestituresimilar to tibiae. elongate (as long as or longer than femora), pro- and Abdomen (Fig. 2, 10). Abdomen with 5 free mesotibiae longer than posterior tibiae; terminal visible sternites, first slightly keeled between meta- ume 16, No. 4, December, 2002, INSECTAMUNDI coxae. Vestiture denser and more obvious than that of in Europe (Brodzinsky,pers. comm.), andexact where- dorsum; setae more closely spaced and numerous in abouts are unknown. central portion of first 4 sternites; setae on Ejth less Comparison with B. fulua. [Since 2 of the 3 numerous and finer, surface shinier beneath. Ulti- known species are Asian and extremely rare, they mate visible tergite margin clothed with about 15 were not available for comparison].Although B. uiuafos- exceptionally long setae (at point of genitalic exser- ile is slightly smaller and slightly darker, it is ex- tion; about length of parameres; Fig. 5). tremely similar to B. fulva. The third antennomere is Male Genitalia (Fig. 4-6). Ofthe typicalelaterid much longer than the fourth in B. fulva, and the type. Parameres broad atbase, terminating in trun- serration begins on antennomere 5 (Fig.13-14). InB. cate apex, with diagonally, posteriorly projecting vivafosile the third and fourth are similar in length, hook. Clothed with sparse short setae on dorsum and but the serration begins on antennomere 4 (Fig. 3). venter. Central piece (intromittent organ) narrow, All specimens of B. fulva that I have seen are pale cylindrical, acute, projecting barely beyondparamere yellow or straw colored; this may be natural, or it may tips. Inlateralview (Fig. 4, venter at top) tips of both be due to factors of collection or preservation or desert structures curved slightly ventrally. Compare with bleaching of dead specimens (several are partial bod- Elateridae (Fig.