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Biota Neotropica

On-line version ISSN 1676-0611

ARTIGOS

A new species of Neocordulia Selys, 1882 (Odonata: Corduliidae) from Minas Gerais State, Brazil

Uma nova espécie de Neocordulia Selys, 1882(Odonata: Corduliidae) bởi Estado de Minas Gerais, Brasil

Tatiana Chrysostomo SantosI, *; Janira Martins CostaI; César CarriçoI, II

IDepartamenlớn de Entomologia, Museu Nacional, Universidade Federal vì chưng Rio de Janeiro - UFRJ, Quinta domain authority Boa Vista, CEP 20940-040,São Cristóvão, Rio de Janeiro, RJ, Brasil IIInstituto de Biologia, Programa de Pós-graduação em Biologia Animal - PPGBA, Universidade Federal Rural bởi vì Rio de Janeiro - UFRRJ, BR 465, Km 7, CEP.. 23890-000,Seropédica, Rio de Janeiro, RJ, Brazil

ABSTRACT

A new species of Neocordulia is described and illustrated based on a reared male, collected at Cachoeira da Eubisose stream, São Tomé das Letras, Minas Gerais State, Brazil. The Holotype is deposited in the Museu Nacional, UFRJ, Rio de Janeiro, Brazil.

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Keywords: dragonfly, Anisoptera, stream, taxonomy, Brazil.

RESUMO

Uma nova espécie de Neocordulia é descrita e ilustradomain authority com base em um mađến obtivì chưng a partir de criação de ninfa, coletadomain authority no riađến domain authority Cachoeira da Eubiose, São Tomé das Letras, Estavị de Minas Gerais, Brasil. O Holótipo está depositavì no Museu Nacional, UFRJ, Rio de Janeiro, Brasil.

Palavras-chave: libélula, Anisoptera, riamang đến, taxonomia, Brasil.

Introduction

The genus Neocordulia was established by Selys-Longchamps (1882) based on Gomphomacromia androgynis (Selys, 1871) including G. bateđắm say (Selys, 1871) & G. setifera (Hagene in Selys, 1871) with 13species & one subspecies all neotropical (Garrison etal. 2006, Costa & Machabởi vì 2007, Costa etal. 2008). Out of these, ten occur in Brazil. Most of the ten Brazilian species are concentrated in the Southeastern states, with two records from the State of RioGrande vị Sul (Santos 1968) and Santa Catarina (Costa etal. 2008). We describe herein one new species of Neocordulia from Minas Gerais State, based on a reared male larva.

Neocordulia machadoi sp. n. differs from the other species of Neocordulia by the small conical protuberance of S8with a concave contour in its distal kết thúc.

Material & Methods

The larva was collected with sieve sầu (500μ) from shallow riffles and reared during 18days, emerging on 2.XI.2009. All drawings were made with the aid of a camera lucidomain authority attached to lớn a stereoscopic microscope; measurements were made with the aid of a Starrett digital caliper. Terminology for wing venation follows Riek và Kukalová-Peông xã (1984). S1-10refers khổng lồ abdominal segments 1-10, FW to lớn fore wing and HW lớn hind wing.

Results

1. Neocordulia machadoi sp. n. (Figures 1-5)

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Male (holotype). Head. Postfrons, antefrons, postclypeus and anteclypeus light brown; labium pale, with long blachồng setae uniformly distributed; mandibles dark brown & maxillae yellowish; frons divided by a strongly deep median furrow with flattened facets. Vertex light brown, rounded, with regularly distributed setae. Occipital triangle large, light brown, with concentrated setae. Antennae dark brown; ocellus dark brown; rear of head light brown.

Thorax: Prothorax yellowish. Pterothorax light brown & iridescent metallic green covered with brown & golden yellow setae. Mesepisternum with a longitudinal light brown stripe and green reflections. Legs blaông chồng, except coxae và trochanter. All tibiae with a ventral keel along distal third. Wings hyaline và light yellowish; venation black; pterostigma light brown; membranule enlarged, Trắng, ending before apex of anal triangle. Wing margin at distal over of anal triangle entire, without a distinct excavation. Anal angle rounded.

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Venation: Antenodals in FW 10/10; in HW 7/7; postnodals in FW 8/10, in HW 10/10. Arculus proximal lớn second antenodal. Sectors of arculus stalked in both wings. All triangle không tính phí. One CuA crossvein in FW, two in HW. FW discoidal field parallel sided with two rows of cells except three rows on distal over. Discoidal field in HW with two rows of cells. Mspl indistinct. RP2slightly undulate. Rspl distinct with six cells. Anal loop elongate surpassing màn chơi of distal angle of triangle, with 15/15cells. Space between anal loop & triangle with two cells at base. Space between posterior border of anal area & distal end of anal loop with 2-3rows of cells. Posterior border of anal loop with two cells.

Abdomen: Posterior margin of anterior lamina with medial arched ryên ổn bearing a tuft of setae on each lateral; inner branch of hamule wider than outer branch, with three small teeth (Figure1); vesica spermalis with one short apical flagellum (Figure3); S7-8moderately widened, depressed dorsoventrally; dorsolateral carinae present on S3-7; sternum of S8with a small conical protuberance & a pithất bại area (Figure4). S1-10dark brown. Segment 10with middorsal keel indistinct, except for a blunt apical tooth. Genital lobe quadrangular; hamule long, surpassing half the height of genital lobe (Figure2). Cerci (Figure5) divergent tips, shorter than S9 + 10, covered with long setae. Epiproct much shorter than cerci with distal margin slightly angulate medially with two teeth.

Measurements (mm): Total length (including anal appendages) 56; maximum width of head 8.0; total length of thorax 10.0; length of metepisternal stripe 6.0; length of femur I 5.3; II 7.5, III 8.3; tibiae I 6.0, II 7.0, III 8.5; tibial keel I 4.0, II 4.0, III 7.0; length of FW 38.5, HW 38.0; maximum width of HW 15.0; FW pterostigma length 3.0, HW 3.0; distance from base to nodus đôi mươi.0, distance from nodus to apex 18.5; total length of abdomen 35.0; length of hamule 1.2; maximum width of hamule 0.1; length of genital lobe 1.5, width of genital lobe 1.0; length of cerci 4.0, length of epiproct 2.0.

Material examined: Holotype ♂, BRAZIL, Minas Gerais, Cachoeira domain authority Eubiose stream, São Tomé das Letras; 21° 43"0"S & 44° 58" 60" W, 15.X.2009, J.M.Costa và C. Carriço leg. (emerged 02.XI.2009).

Etymology: This species is named after Prof. Angelo B. Machavày from Universidade Federal de Minas Gerais (UFMG).

Diagnosis: Neocordulia machadoi can be readly separated from the other species of the genus by having a small conical protuberance of S8with a contour in its distal end.

Discussion

This new species belongs khổng lồ the genus Neocordulia Selys (sensu May 1991) by the following characters: 1) posterior margin of anterior lamina with medial arched rim bearing a tuft of setae on each lateral end; 2) hamule divided into lớn lateral and medial branches or lobes và 3) long legs (May 1991, Garrison et al. 2006, Machavị 2005, Costa và Machavì 2007, Costa etal. 2008).

Conlusion

Based on shape of cerci we believe that Neocordulia machadoi shows closer affinities to Neocordulia setifera (Hagene in Selys, 1871) but differs (characters for N. setifera in parenthesis) by distal over of cerci with few setae (with tuft of setae) & vesica spermalis with one short apical flagellum (large) và the small conical protuberance of S8(large).

Acknowledgements

We are grateful to lớn Angelo B. Machavày for helpful reviews of the manuscript. This paper was supported in part by CAPES, CNPq và FAPERJ.

References

COSTA, J.M. & MACHADO, A.B.M. 2007. Two new species of Neocordulia Selys, 1882 from southern Brazil (Anisoptera: Corduliidae). Lundiana 8(2):143-146. < Links >

COSTA, J.M., RAVANELLO, C.T. và SOUZA-FRANCO, G.M. 2008. Description of a new species of Neocordulia Selys, 1882 (Odonata: Libellulidae, Corduliinae) from Southern Brazil. Zootaxa 1704:64-68. < Links >

MACHADO, A.B.M. 2005. Neocordulia matutuensis spec. nov. from Brazil (Anisoptera: Corduliidae). Odonatologica 34(3):299-302. < Links >

MAY, M.L. 1991. A Reviews of the genus Neocordulia, with a mô tả tìm kiếm of Mesocordulia Subgen. nov. & of Neocordulia griphus spec. nov from Central America, & on Lauromacromia (Odonata: Corduliidae). Folia Entomol. Mex. 82:17-67. < Links >

GARRISON, R.W., VON ELLENRIEDER, N. và LOUTON, J.A. 2006. Dragonfly genera of the new world: an illustrated và annotated key lớn the Anisoptera. The Johns Hopkins University Press, Baltimore, p.1-359. < Links >

RIEK, E.F. và KUKALOVÁ-PECK, J. 1984. A new interpretation of dragonfly wing venation based upon Early Upper Carboniferous fossils from Argentina (Insecta: Odonatoidea) và basic character states in pterygote wings. Can. J. Zool. 62(6):1150-1166. < Links >

SANTOS, N.D. 1968. Notas sobre Neocordulia androgynis (Selys, 1871) (Odonata, Corduliidae). Atas Soc. Biol. vị Rio J. 31:239-316. < Links >

SELYS-LONGCHAMPS, E. 1882. chú ý sur le genre Gomphomacromia Brauer. Ann. Soc. Entomol. Belg. 26:166-169. < Links >

* Autor para correspondência: Tatiamãng cầu Chrysostomo Santos, e-mail: taticsantos42