Zootaxa 3753 (2): 196 200 www.mapress.com/zootaxa/ Copyright 2014 Magnolia Press Article http://dx.doi.org/10.11646/zootaxa.3753.2.9 http://zoobank.org/urn:lsid:zoobank.org:pub:af18449f-e216-44c3-a7b0-0e9dee44b4c7 ISSN 1175-5326 (print edition) ZOOTAXA ISSN 1175-5334 (online edition) A new species of Iapir Py-Daniel, Fonseca & Barbosa (Coleoptera: Myxophaga: Torridincolidae) from Brazil with key to species of the genus BRUNNO HENRIQUE LANZELLOTTI SAMPAIO 1, 2 & NELSON FERREIRA-JR¹ 1 Laboratório de Entomologia, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro. Caixa Postal 68044, Rio de Janeiro, RJ, 21941-971, Brasil 2 Pós-graduação em Ciências Biológicas - Zoologia, Museu Nacional, Universidade Federal do Rio de Janeiro. E-mail: brunnosampaio@ufrj.br Abstract The genus Iapir is known only from Brazil, currently with five species. This genus is characterized by the lack of a tooth on the hind margin of metatrochanter and a semi-lunar depression prolonged toward apex of the last ventrite on female specimens. Herein we describe an additional species, Iapir vanini sp. nov., collected in southeastern Brazil in Santa Teresa (type locality), Castelo, and Domingos Martins municipalities, in Espírito Santo State. The presence of a fringe of setae on the anterior face of front tibiae and on the posterior face of hind tibiae, and the male genitalia with an oblique apex in lateral view and bearing tufts of seta on distal third, distinguish this species from other Iapir. A key for identification of the species of Iapir is presented. Key words: Atlantic Rainforest, Espírito Santo State, Neotropical Region Introduction Torridincolidae Steffan are a family of small beetles found in hygropetric environments. This family is currently represented by 37 species distributed in seven genera: Delevea Reichardt (2 spp.), Incoltorrida Steffan (1 sp.), and Torrindicola Steffan (3 spp.) in the Afrotropical Region; Satonius (6 spp.) Endrödy-Younga in the Palearctic Region; and Claudiella Reichardt & Vanin (1 sp.), Iapir Py-Daniel, Fonseca & Barbosa (5 spp.), and Ytu Reichardt (19 spp.) in the Neotropical Region. Iapir is very similar to Claudiella, sharing characteristics like four abdominal ventrites, with a plastron on the last three, and a semi-lunar depression on the last ventrite (Reichardt & Vanin 1976). Claudiella may be diagnosed from Iapir by the presence of a tooth on the hind margin of metatrochanter, absent on the former and by the semi-lunar depression which is prolonged on Iapir females and simple on Claudiella. Iapir is recorded only from Brazil, in the states of Espírito Santo, Minas Gerais, Rio de Janeiro, Pará, and Pernambuco. A new species is here described and illustrated, along with a key for the six known species of Iapir. Material and methods The specimens of this new species were collected in 2011 in Castelo, Domingos Martins, and Santa Teresa municipalities, in Espírito Santo State, Brazil. The material was fixed and preserved in 80 93% ethyl alcohol. Specimens were analyzed using a stereoscopic microscope with 115 zoom. Photos were taken in a stereoscopic microscope with attached camera and combined with the software Combine ZP. Measures of the holotype and four paratypes were taken and variation is presented. Male genitalia were dissected, prepared with heated lactic acid, and mounted on a temporary slide for observation and drawings. After that the male genitalia were stored together with the specimen in microvials with 93% ethyl alcohol. The mouthparts were also dissected and prepared in a 196 Accepted by M. Gimmel: 25 Nov. 2013; published: 6 Jan. 2014
similar fashion to male genitalia, but mounted on permanent slides for observation and drawings. Hind wings were prepared on slides with ethyl alcohol and sealed. All drawings were made with the help of a camera lucida and finalized on image editor software. Type material was deposited in the collections of the Instituto de Biologia (Coleção Entomológica Professor José Alfredo Pinheiro Dutra, DZRJ) and the Museu Nacional do Rio de Janeiro (MNRJ), both in the Universidade Federal do Rio de Janeiro. Taxonomy Iapir vanini sp. nov. (Figs. 1a g) Diagnosis. This species differs from the other congeneric species by the presence of a fringe of setae on the anterior face of front tibiae and on the posterior face of hind tibiae; the male genitalia are also extremely different from all other Iapir species, with an oblique apex in lateral view and bearing tufts of seta on distal third. Description. Holotype. Body and antennae black, shining in dorsal view; legs and ventral surface brown. Total length: 1.75 mm; head width 0.38 mm; pronotal length 0.39 mm, width 0.75 mm; elytral length 1.01 mm, width 0.96 mm. FIGURE 1. Iapir vanini sp. nov. a b) Habitus (scale: 1 mm): a) dorsal; b) ventral. c e) Mouthparts (scale: 0.1 mm): c) labrum; d) mandibles; e) left maxilla. f g) Male genitalia (scale: 0.1 mm): f) lateral view; g) dorsal view. A NEW IAPIR FROM BRAZIL Zootaxa 3753 (2) 2014 Magnolia Press 197
Anterior margin of labrum (Fig. 1c) straight with antero-lateral angles rounded, fringed with long and fine setae. Anterior margin of clypeus truncate and lateral margins convex; surface with sparse micro-iridescent punctures. Mandibles asymmetrical (Fig. 1d): left mandible with a pair of apical non-articulated teeth and a subapical articulated tooth; molar lobe with transverse ridges on the dorsal surface; right mandible with a apical non-articulated tooth and a subapical articulated tooth; molar lobe and prostheca like on left mandible. Maxilla (Fig. 1e): mala without suture dividing it; with four apical laminar processes and a row of subapical setae; stipes with a subapical long seta; palpus with three palpomeres (palpomeres II and III similar in length; basal palpomere half length of second palpomere). Frons bearing a pair of carinae laterally; carinae not strongly raised and more conspicuous near antennae. Surface of head microrugose posteriorly, in front of pronotum. Anterior margin of pronotum (Fig. 1a) bisinuate; lateral margin convex; greatest width on posterior fourth; posterior margin biarcuate with a very small medial projection and bearing fine setae on medial 1/2 and some longer setae near postero-lateral angles; surface with iridescent micro-punctures; anterior third depressed on the disc; postero-lateral angles depressed and flattened. Scutellum very small, with a truncate anterior margin. Elytra (Fig. 1a) with convex anterior margins raised from elytral suture to 11 th interval; lateral margins crenulate, converging to acute apices; 13 striae formed by iridescent punctures; odd intervals raised from third to 11 th ; 13 th interval with a carina extending from humerus to apex. Epipleuron with lateral margin raised near the humerus. Posterior wing reduced. Anterior margin of prosternum (Fig. 1b) crenulate and feebly concave; lateral margin subparallel on anterior half, oblique on posterior half; postero-lateral angles rounded; posterior margin sinuate. Mesosternum with anterior margin depressed, except for a medial gibbosity that fits into an internal cavity on prosternum; more than twice as wide as long; surface smooth. Metasternum disc smooth, with a shallow medial impression; metasternal carina complete. Front and middle coxae with a row of setae on posterior face; front tibia with a fringe of setae on anterior face; middle tibia with setae on anterior and posterior face, smaller than those of front tibia; hind tibia with a fringe of longer setae on posterior face. Tarsomere I smaller than others; tarsomere II bearing two setae of different length; apical tarsomere longer than subapical tarsomere. Abdomen (Fig. 1b) carinate medially; carina more conspicuous on first ventrite and ending on a gibbosity on the last ventrite; semi-lunar depression present, but not conspicuous (at least in male). Male genitalia (Figs. 1f, g) with median lobe about three times phallobase length, not flattened; in lateral view slightly more convex in median third, ventral margin sinuate, with oblique, digitiform apex; in dorsal view, narrowing abruptly from distal third to apex and with tufts of long lateral setae in this region; parameres very short, about as long as the process of phallobase; each paramere unisetose, seta shorter than half of paramere length. Bionomic Notes. The specimens were collected in hygropetric localities together with some specimens of Ytu. Larvae of Iapir were found in the same localities, but it is not possible to identify them as larvae of Iapir vanini sp. nov., because the larvae of Iapir species have no diagnostic characteristics observed. Female. Like on some species of Iapir, this new species presents sexual dimorphism of the semi-lunar impression on abdomen. On females the impression is medially projected toward the apex of abdomen, while on males the impression is simple, without projection. Variation. Total length: 1.61 1.75 mm; head width 0.34 0.38 mm; pronotal length 0.33 0.39 mm, width 0.68 0.75 mm; elytral length 1.01 1.10 mm, width 0.90 0.96 mm. Etymology. This species is named in honor of Dr. Sergio Vanin, whose interest in torridincolids has increased the knowledge of this family of Coleoptera. Comparative notes. The new species differs from Iapir trombetensis (Fonseca, Py-Daniel & Barbosa) and I. quadridentatus Braule-Pinto, Fonseca & Hamada by the lack of a tooth on posterior trochanter, present on these two species (Braule-Pinto et al. 2011; Fonseca et al. 1991). Although the figure of the hind trochanter of I. trombetensis presented by Fonseca et al. (1991) shows a conspicuous tooth, the paratypes analyzed only presented a feeble tooth. It differs from these two species by the shape of the male genitalia: elongated and narrowing toward apex in ventral view on I. trombetensis and I. quadridentatus, while the new species has short genitalia, narrowing abruptly on distal third (Braule-Pinto et al. 2011; Fonseca et al. 1991). Iapir vanini sp. nov. possesses reduced hind wings, much like I. castalia (Reichardt). This character is present in Satonius kurosawai (Satô), but some specimens of this species present a developed hind wing (Hájek et al. 2011), suggesting that this characteristic may be variable in other species. The new species may be distinguished from I. castalia by the 198 Zootaxa 3753 (2) 2014 Magnolia Press SAMPAIO & FERREIRA-JR
presence of tufts of setae on the distal third of male genitalia and its oblique apex. In I. castalia the apex is digitform and there is no tuft of setae (Reichardt 1973). Iapir britskii (Reichardt & Costa) and I. borgmeieri are very similar to the new species and may be diagnosed from it by the lack of tufts of setae on male genitalia (Reichardt 1973; Reichardt & Vanin 1976). Type material: Brazil, Espirito Santo state, Santa Teresa Municipality. Holotype, Male. Reserva Biológica Santa Lúcia, Córrego Sagui, 19 58 02.7 S 40 32 10.5 W, 03.IV.2011, Jardim, G.A. leg. [DZRJ Coleoptera-5634]; deposited in DZRJ. Paratypes: 7 specimens, same data as holotype [DZRJ Coleoptera- 5635]; 1 male and 1 female, same data as holotype [MNRJ]; 3 males and 1 female, Castelo Municipality, Parque Estadual do Forno Grande, Riacho de 1 a ordem, 20 31 00.1 S 41 05 05.8 W, 30.III.2011, Jardim, G.A.; Dumas, L.L.; Nessimian, J.L. leg. [DZRJ Coleoptera-5636]; 1 male and 1 female, Domingos Martins Municipality, Parque Estadual da Pedra Azul, Córrego das Piscinas, 20 23 51.4 S 41 01 23.9 W, 01.IV.2011, Jardim, G.A. leg. [DZRJ Coleoptera-5637]. FIGURE 2. a, b- Elytron detail: a) Iapir trombetensis with protuberant humeral callus; b) Iapir vanini sp. nov. with humeral callus non-protuberant; c, d- Hind trochanter: c) Iapir quadridentatus with projection tooth-like; d) Iapir vanini sp. nov. without projection; e, f- Last ventrites of Iapir vanini sp. nov.: e) male; f) female; g, h- Hind wings: g) Iapir trombetenis; h) Iapir quadridentatus. Key to the species of Iapir Py-Daniel, Fonseca & Barbosa 1. Humeral callus feebly to strongly protuberant (anterior margin of elytron sinuate) (Fig. 2a); hind trochanter with a tooth-like projection (Fig. 2c).................................................................................... 2 1. Humeral callus not protuberant (anterior margin of elytron slightly sinuate) (Fig. 2b); hind trochanter without projection like a tooth (Fig. 2d)........................................................................................ 4 A NEW IAPIR FROM BRAZIL Zootaxa 3753 (2) 2014 Magnolia Press 199
2. Supra-orbital carina fading before the posterior margin of eye; semilunar impression of abdomen dimorphic in male and female (on females the impression is projected medially toward the apex of abdomen) (Figs. 2e, f)..................................................................... Iapir borgmeieri (Reichardt & Vanin) [Brazil, Minas Gerais State] 2. Supra-orbital carina reaches the posterior margin of eye; semilunar impression of abdomen similar on males and females.. 3 3. Hind trochanter with tooth-like projection conspicuous (Fig. 2c); hind wing with RP vein reaching the oblongum cell in the apex of rp-mp 1 vein, near to r 4 (Fig. 2h)....Iapir quadridentatus Braule-Pinto, Fonseca & Hamada [Brazil, Pernambuco State] 3. Tooth-like projection on hind trochanter present but not conspicuous; hind wing with RP vein reaching the oblongum cell in the middle of rp-mp 1 vein (Fig. 2g)............... Iapir trombetensis (Fonseca, Py-Daniel & Barbosa) [Brazil, Pará State] 4. Pronotum slightly raised medially, forming a keel feebly conspicuous on posterior third...................................................................................... Iapir castalia (Reichardt) [Brazil, Rio de Janeiro State] 4. Pronotum entirely convex, without raised area forming a keel.................................................. 5 5. Hind wing reduced (Fig 1a); male genitalia with subapical tufts of setae (Fig. 1c)................................................................................................ Iapir vanini sp. nov. [Brazil, Espirito Santo State] 5. Hind wing developed (Fig. 2g, h); male genitalia glabrous........................................................................................ Iapir britskii (Reichardt & Costa) [Brazil, Espirito Santo and Rio de Janeiro State] Acknowledgements We would like to thank Dr. Augusto Loureiro Henriques, curator of the invertebrate collection of Instituto Nacional de Pesquisas da Amazônia (INPA) for the loan of the material and Dr. José Albertino Rafael for making it easily available for study. We would like also to thank Crystal Maier (University of Kansas) and an anonymous reviewer whose suggestions enriched this article. References Braule-Pinto, V.A., Fonseca, C.R. & Hamada, N. (2011) Iapir quadridentatus sp. nov., a new torridincolid beetle from Brazil (Coleoptera: Myxophaga: Torridincolidae). Zootaxa, 3031, 47 53. Fonseca, C.R.V., Py Daniel, V. & Barbosa, U.C. (1991) Uma nova espécie de Hintonia Reichardt, 1973 da Amazônia Brasileira (Coleoptera, Torridincolidae). Revista Brasileira de Entomologia, 35 (2), 293 295. Hájek, J., Yoshitomi, H., Fikáček, M., Hayashi, M. & Jia, F.L. (2011) Two new species of Satonius Endrödy-Younga from China and notes on the wing polymorphism of S. kurosawai Satô (Coleoptera: Myxophaga: Torridincolidae). Zootaxa, 3016, 51 62. Reichardt, H. (1973) A critical study of the suborder Myxophaga, with a taxonomic revision of the Brazilian Torridincolidae and Hydroscaphidae (Coleoptera). Arquivos de Zoologia, São Paulo, 24 (2), 73 162. Reichardt, H. & Vanin, S.A. (1976) Two new Torridincolidae from Serra do Cipó, Minas Gerais, Brazil (Coleoptera, Myxophaga). Studia Entomologica, 19, 211 218. 200 Zootaxa 3753 (2) 2014 Magnolia Press SAMPAIO & FERREIRA-JR