Taxonomic Position of the Oriental Species of Mesosa (Mesosa) (Coleoptera, Cerambycidae, Lamiinae, Mesosini)
Total Page:16
File Type:pdf, Size:1020Kb
Hindawi Publishing Corporation Psyche Volume 2012, Article ID 467949, 15 pages doi:10.1155/2012/467949 Research Article Taxonomic Position of the Oriental Species of Mesosa (Mesosa) (Coleoptera, Cerambycidae, Lamiinae, Mesosini) Junsuke Yamasako1 and Nobuo Ohbayashi2 1 Entomological Laboratory, Faculty of Agriculture, Ehime University, Tarumi, Matsuyama 790-8566, Japan 2 Kamimiyada 1334-444, Minamishitaura-machi, Miura 238-0101, Japan Correspondence should be addressed to Junsuke Yamasako, [email protected] Received 9 September 2011; Accepted 25 October 2011 Academic Editor: Michael Rust Copyright © 2012 J. Yamasako and N. Ohbayashi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Twelve oriental mesosine species which had been belonged to the nominotypical subgenus of the genus Mesosa Latreille, 1829, are transferred to the subgenus Dissosira Pascoe, 1865 of the genus Agelasta Newman, 1842, as follows: A. (D.) perplexa (Pascoe, 1858); A. (D.) columba (Pascoe, 1859); A. (D.) rufa (Breuning, 1935); A. (D.) catenatoides Yamasako and N. Ohbayashi, nom. nov. [replacement name for A. (D.) laosensis (Breuning, 1935) already occupied by Pic (1925)]; A. (D.) gardneri (Breuning, 1938); A. (D.) nigropunctata (Breuning, 1938); A. (D.) konoi (Hayashi, 1956); A. (D.) yonaguni (Hayashi, 1962); A. (D.) nigrostictica (Breuning, 1967); A. (D.) siamana (Breuning, 1974); A. (D.) praelongipes (Kusama and Irie, 1976); A. (D.) kumei (Takakuwa, 1991). 1. Introduction On the other hand, the 12 oriental species are a different phyletic line from the Palearctic species group and are closely The genus Mesosa was erected by Latreille [1] on the basis related to the subgenus Dissosira Pascoe, 1865, of the genus of two Palearctic species, Cerambyx curculionoides Linnaeus, Agelasta Newman, 1842. 1761 and Lamia nebulosa Fabricius, 1781, of which the form- As we have already pointed out in a previous paper (Yam- er was designated as the type species of the genus. Later, Bre- asako and Ohbayashi [4]), the hitherto distinguishable fea- uning [2] divided the genus Mesosa into six subgenera as fol- ture between Mesosa and Agelasta, the rounded or truncated lows: Mesosa (Mesosa) Latreille 1829; M.(Aphelocnemia prosternal process in lateral view, is not a suitable characteris- [sic]) Stephens, 1831; M.(Saimia) Pascoe, 1866; M.(Anthly- tic, and many species in the genus Mesosa have been confused boscila) Thomson, 1868; M.(Perimesosa) Breuning, 1939; M. with the genus Agelasta because of this problem. According (Metamesosa) Breuning, 1939. Recently, Yamasako and Oh- to other external features and the endophallic structures, the bayashi [3]erectedanewsubgenus,M.(Lissomesosa), and 12 species distributed in the Oriental region should be trans- they also [4]synonymizedM.(Anthlyboscila)withAgelasta ferred to Agelasta (Dissosira) in spite of their rounded pros- (Dissosira) Pascoe, 1865. As a result, the genus Mesosa now ternal process. Therefore, we herein propose them to be consists of six subgenera and includes more than 80 species. transferred from Mesosa (Mesosa)toAgelasta (Dissosira). Among the subgenera, Mesosa (Mesosa) is the nomino- This is the ninth part of our studies on the Asian Mesosini. typical subgenus and comprised of 19 species until now. However,asaresultofourcloseexaminationoftheexternal and male genital features, they are considered to be polyphy- 2. Materials and Methods letic and could be separated into some species groups. Of those, one group, including the name-bearing type M. curcu- This study was conducted based on the dried specimens pre- lionoides (Linnaeus, 1761), is the true nominotypical species served in the following public collections, our private collec- group and is distributed throughout the Palearctic region. tions, and also the collections of friends. 2 Psyche BMNH: The Natural History Museum, London, UK. MPH, and APH, with three kind spicule like sclerites as MSp, EUMJ: Ehime University Museum, Matsuyama, LSp, and SSp. BPH nearly 0.2 times as long as endophallus. Japan. MPHnearly0.7timesaslongasendophallus,subdivided into two membrane subdivisions as almost fused MT+CT MNHN: Museum´ National d’Histoire Naturelle, and PB by a distinct constriction. APH well swollen and oval Paris, France. bursiform, nearly 0.2 times as long as endophallus, with ED ZSM: Zoologische Staatssammlung Munchen,¨ Mun- on dorsal side, usually with AA which is lingulate shape and ich, Germany. laid near ED, without AS. MSp usually distributed in nearly apical half of MT+CT. The verbatim label data indicated by double quotation LSp usually distributed in nearly basal half of MT+CT; dorsal marks (“”) are given for the type materials, and the line side ones thick and short, arranged into two irregular lon- breaks of the label are indicated by a slash (/). gitudinal lines, unidentate in apical area, thence becoming The observational method and the corresponding terms thicker, denser, and multidentate toward basal area; ventral of endophallus should be referred to Yamasako and Ohba- side ones rudimentary unidentate, and disappeared in some yashi [5]. cases. SSp unidentate, short, and small, covered almost entire area of PB. MSp area and LSp area adjacent. LSp area and SSp 3. Systematics area are separated but close to each other. Agelasta (Dissosira) Pascoe, 1865 Remarks. Up to the present time, the genus Agelasta includes over 70 species which are separated into nine subgenera. Type species. Agelasta catenata Pascoe, 1862 (Figures Agelasta (Dissosira) has mainly been distinguished from the 1(d)–1(f), 2(c)-2(d), 3(a)-3(b), 6(a), 7(a)–7(d), and other subgenera by the following features (Breuning [2]): (1) 9(a)). pronotum without five distinct tubercules on disk, (2) elytra Dissosira Pascoe, 1865. 124, note [6]. with basal margin not forming transversal edge, without high bosses near base and long suberect setae throughout, (3) Chaeromorpha (Dissosira): Aurivillius, 1922: 145 [7]. humeri weakly projected laterad, (4) prosternal process well Agelasta (Dissosira): Breuning, 1939: 482 [2]. truncated in lateral view. As already indicated by Yamasako and Ohbayashi [4], 24 Anthriboscyla Thomson, 1868. 165 [8]; type species: known species belonging to the subgenus Dissosira could be Anthriboscyla mima Thomson, 1868. separated into some species groups based on the external and Mesosa (Anthriboscyla): Breuning, 1939: 411 [2]. male genital features. The redescription above is based on the Pseudaemocia Breuning, 1935. 269 [9]; type species: type species group of the subgenus (Yamasako and Ohba- Pseudaemocia rufa Breuning, 1935 syn. nov. yashi [4]). Mutatocoptops (Pseudaemocia): Breuning, 1939: 506 [2]. The Species Transferred from Mesosa (Mesosa) to Agelasta (Dissosira). The following 12 species which are classified into Mesosa (Mesosa) are distinctly different from the type species Redescription (Modified the Diagnosis of Yamasako and Ohba- of the subgenus, M. (M.) curculionoides (Figures 1(a)–1(c), yashi [4]). Body ovoid in shape; eyes subdivided; lower lobes 2(a)-2(b)) in the external features and the endophallic struc- relatively large, slightly wider than long. Antennal tubercles tures. These characteristics well coincide with Agelasta (Dis- hardly elevated. Antennae well long and thick; each segment sosira) except for the rounded prosternal process. without apical spine, fringed beneath by suberect short setae; scape well long, slightly thickened apically, with a well-devel- oped cicatrix on the apex; third segment distinctly longer 3.1. Agelasta (Dissosira) perplexa (Pascoe, 1858), Comb. Nov. than scape and fourth, respectively. Pronotum wider than (Figures 3(c)-3(d), 6(b), 7(e)–7(h), and 9(b)) long, with some indistinct discal tubercles; each side near apical margin usually with a small dull projection. Prosternal Mesosa perplexa Pascoe, 1858: 243 [6]. process with extremity usually well swollen posteroventrally, Pachyosa perplexa: Matsushita, 1933: 344 [10]. almost truncate in lateral view, but sometimes hardly swollen Mesosa (Mesosa) perplexa: Breuning, 1939: 401 [2]. and more or less roundly sloped in lateral view. Mesosternal process with a well-developed tubercle on the center near the Saimia alternans Schwarzer, 1925: 60 [11]. apex and roundly projected anteroventrally, almost truncate Mimocoptops? formosana Pic, 1925: 30 [12]. in lateral view. Elytra without basal high bosses and lacking long sub- Diagnosis. Body black, covered with ocher pubescence. Occi- erect hairs. Legs with mesotibiae without distal notch on put with four narrow longitudinal black bands. Antennae anterior side. with each basal part of third to the last segments with white pubescent annulations though it is very narrow on fifth, sev- Endophallus. Endophallus well long and slender, approxi- enth, and ninth segments. Pronotum with three longitudinal mately three times as long as median lobe, divided into BPH, narrow black bands on disk. Elytra with two light yellowish Psyche 3 Figure 1: Comparison of the type species of Mesosa (Mesosa)andAgelasta (Dissosira). (a–c) M. (M.) curculionoides;(d–f)A. (D.) catenata; (a, d) male habitus in dorsal view; (b, e) ditto in lateral view; (c, f) ditto in frontal view. Figure 2: Comparison of the type species of Mesosa (Mesosa)andAgelasta (Dissosira). (a, b) M. (M.) curculionoides;(c,d)A. (D.) catenata; (a, c). median lobe with endophallus in lateral view; (b, d) ditto in dorsal view. Scale: