New Curculioninae (Coleoptera: Curculionidae) in Dominican Amber
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Palaeontologia Electronica palaeo-electronica.org New Curculioninae (Coleoptera: Curculionidae) in Dominican amber George Poinar, Jr. and Andrei A. Legalov ABSTRACT A new genus and four new species of Curculioninae are described from Domini- can amber. Neosibinia gen. nov. differs from the extant genera Tychius and Sibinia by the tibiae lacking a mucro and uncus, the elongate pronotum distinctly narrower than the elytral humeri and the sharp bend in the rostrum. Derelomus thalioculus sp. nov. differs from other Derelomus species by the body covering of fine, dense setae. Antho- nomus cruraluma sp. nov. is similar to the extant A. filicornis but differs by the tibiae with mucro, elongate body, shorter rostrum, and the smaller body size. Anthonomus browni sp. nov. is distinguished from the extant A. sulcipygus by its narrow elongate body, femora with minute distal tooth and shorter and thicker rostrum. These new taxa further demonstrate the diversity of weevil fauna in Dominican amber. George Poinar, Jr. Department of Integrative Biology, Oregon State University, Corvallis, Oregon 97331, USA. [email protected] Andrei A. Legalov. Laboratory of Phylogeny and Faunogenesis, Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Frunze street, 11, Novosibirsk 630091, Russia. [email protected] Keywords: Derelimini; Anthonomini; Tychiini; new genus, new species; Dominican amber INTRODUCTION Legalov, 2014a, 2014b, 2014c, 2014d, 2015a, 2015b 2015c, 2015d). Weevils of the subfamily Curculioninae are Dating of Dominican amber is controversial diverse with respect to morphology and physiology. with the latest purported age of 20-15 Ma based on Recent studies by the authors have shown that the foraminifera (Iturralde-Vinent and MacPhee, 1996) Dominican amber weevil fauna is represented by and the earliest of 45-30 Ma based on coccoliths 73 species from 32 genera in the families Belidae, (Cêpek in Schlee, 1990). In addition, Dominican Brentidae and Curculionidae (Poinar, 2009; Poinar amber is secondarily deposited in sedimentary and Brown, 2011; Poinar et al., 2013; Poinar and rocks, which makes a definite age determination http://zoobank.org/4BDD1B2E-9F26-4148-BD83-6EC570003701 PE Article Number: 18.1.13A Copyright: Palaeontological Association March 2015 Submission: 26 September 2014. Acceptance: 25 February 2015 Poinar, George, Jr. and Legalov, Andrei A. 2015. New Curculioninae (Coleoptera: Curculionidae) in Dominican amber. Palaeontologia Electronica 18.1.13A: 1-15. palaeo-electronica.org/content/2015/1101-new-curculioninae POINAR & LEGALOV: NEW CURCULIONINAE difficult (Poinar and Mastalerz, 2000). A range of and finely punctate; temples elongate, equal in ages for Dominican amber is possible as the length to eye; antennae inserted in middle of ros- amber is associated with turbiditic sandstones of trum, elongate, almost reaching apex of pronotum; the Upper Eocene to Lower Miocene Mamey scape elongate, 8.0 times longer than wide; funicle Group (Draper et al., 1994). Dominican amber was with first to seventh antennomeres conical; first produced by the leguminous tree, Hymenaea antennomere 2.1 times longer than wide; second protera Poinar (Poinar, 1991) and a re-construction antennomere 1.3 times longer than wide, 0.3 times of the Dominican amber forest based on amber as long and 0.4 times as narrow as first antennom- fossils indicated that the environment was similar ere; third to fifth antennomeres subequal in length; to that of a present day tropical moist forest (Poinar third antennomere equal in length and width, 1.3 and Poinar, 1999). times as wide as second antennomere; fourth The present study describes representatives antennomere 0.8 times longer than wide, 1.2 times of Curculioninae from Dominican amber, including as wide as third antennomere; fifth antennomere a new species of Derelomus Schoenherr, 1825 in equal to fourth antennomere; sixth antennomere the tribe Derelomini, two new species of Anthono- 0.9 times longer than wide, 1.4 times as long and mus Germar, 1817 in the tribe Anthonomini and a 1.3 times as wide as fifth antennomere; seventh new genus in the tribe Tychiini. antennomere 0.7 times longer than width, 1.3 times as wide as sixth antennomere; club compact, MATERIALS AND METHODS 1.4 times longer than wide, 0.4 times as long as funicle. The specimens were obtained from amber Pronotum almost conical; 1.6 times longer than mines in the Cordillera Septentrional of the Domini- wide at apex, of equal length and width in middle, can Republic. Most types are deposited in the 0.9 times longer than wide at base, with lateral Poinar amber collection maintained at Oregon carinae; disk flattened, densely and finely punctate; State University (PACO, Corvallis, OR, USA). One scutellum trapezoidal. type is deposited in the American Museum of Natu- Elytra elongate and distinctly flattened, 1.7 times ral History (AMNH, New York, NY, USA) collection. longer than wide at base, 1.6 times longer than Descriptions and photographs were produced wide in middle, 2.4 times longer than wide at apical by the authors using a Nikon SMZ-10 steroscopic fourth, 2.4 times as long as pronotum; greatest microscope and Zeiss, Stemi-2000-C. Helicon width behind middle, humeri weakly convex; striae Focus Pro X64 was used to stack photos for better regular and thin; strial punctures small, oval, clarity and depth of field. All measurements were dense; elytral intervals flattened, wide, 4.0-5.0 made using an ocular micrometer. times as long as striae; apices of elytra not rounded; pygidium concealed. SYSTEMATIC PALAEONTOLOGY Thorax punctate; precoxal portion of prosternum Family CURCULIONIDAE Schoenherr, 1825 elongate, 2.3 times as long as procoxal cavities, Subfamily CURCULIONINAE Schoenherr, 1825 14.0 times as long as postcoxal portion; procoxal Tribe DERELOMINI Lacordaire, 1866 cavities contiguous; mesocoxal cavities widely Genus Derelomus Schoenherr, 1825 separated, metepisternum narrow, 3.7 times longer Derelomus thalioculus sp. nov. than wide in middle. Figure 1, Figure 2 Abdomen weakly convex ventrally; first and second zoobank.org/136AD4A5-4DCD-4080-BAE8-8D86E498E333 ventrites elongate, equal in length; third and fourth ventrites short, equal in length; third ventrite 0.5 Holotype. Deposited in the PACO (accession # C- times as long as second ventrite; fifth ventrite elon- 82). gate, 1.3 times as long as fourth ventrite. Description. Length body, 2.4 mm; length rostrum, Legs long; pro- and mesocoxae round; metacoxae 0.5 mm. Body reddish-brown, appearing glabrous transverse; femora weakly clavate, without teeth; but actually with a covering of fine, dense setae. trochanters obconical; metafemora 3.2 times lon- Rostrum elongate, equal in length to pronotum, 4.6 ger than wide; tibiae with very small, blunt mucro; times longer than wide in the middle, weakly protibia almost straight; meso- and metatibiae curved, without carinae, finely punctate; antennal slightly curved; metatibiae 3.8 times longer than scrobes lateral and directed toward lower edge of wide in middle; tarsi long; first to third tarsomeres the eyes; forehead wide, flattened, punctate; eyes conical; fifth elongate; tarsomeres with pulvilli on large, rounded, distinctly convex, diameter slighter underside; tarsal claws free, large, clearly diverg- greater than rostrum at base; vertex weakly convex 2 PALAEO-ELECTRONICA.ORG FIGURE 1. Lateral view of Derelomus thalioculus sp. nov. in Dominican amber. Bar equals 0.550 mm. ing, with basal teeth; metatarsus: first tarsomere Anthonomus (Anthomorphus) cruraluma sp. nov. 1.7 times longer than wide at apex; second tar- Figure 3, Figure 4, Figure 5 somere 1.5 times longer than wide at apex; third zoobank.org/824962CC-EB6E-4D3C-87BE-ECF658592432 tarsomere bilobed, 0.8 times longer than wide at Holotype. Female; deposited in the PACO (acces- apex; fifth tarsomere 5.0 times longer than wide at sion # C-125). apex, 2.0 times as long as third tarsomere. Paratype. Male; deposited in the AMNH (acces- Type Locality. Amber mine in the Cordillera sion # AMNH DR-8-414). Septentrional of the northern portion of the Domini- Since many diagnostic features are obscured can Republic. in the male specimen, we have designated the Etymology. The specific epithet is from the Latin female as holotype. “thalus” = dome and the Latin “oculus” = eye in Description. Length body, 2.0-2.2 mm; length ros- regards the convex eyes. trum, 0.8-0.9 mm. Body reddish brown, with dense Remarks. The pronotum with lateral carinae, con- covering of light, recumbent, setiform scales. cealed pygidium, antennal scrobes directed to the Rostrum elongate, 1.3 (male) - 1.8 (female) times eye, short precoxal portion of the prosternum and as long as pronotum, 7.5 (male) - 9.6 (female) convex eyes are features of the genus Derelomus times longer than wide at apex, 6.4 (male) - 8.4 of the tribe Derelomini. The covering of fine, dense (female) times longer than wide in middle, 6.0 setae separates this species from other members (male) - 7.4 (female) times longer than wide at of the genus whose bodies are all glabrous. base, distinctly curved, without carinae, finely and Tribe ANTHONOMINI Thomson, 1859 slightly punctate; antennal scrobes lateral and Genus Anthonomus Germar, 1817 directed toward middle of eye; forehead narrow, Subgenus Anthomorphus Weise, 1883 flattened, punctate; eyes large, rounded, distinctly convex, diameter much greater than rostrum at base; vertex weakly flattened, punctate; temples 3 POINAR & LEGALOV: NEW CURCULIONINAE