Russian Entomol. J. 24(4): 271–279 © RUSSIAN ENTOMOLOGICAL JOURNAL, 2015 Notes on the genera Dischissus and Microcosmodes (Coleoptera, Carabidae, Panagaeini) from the Oriental Region, with description of a new genus and a new species Î ðîäàõ Dischissus and Microcosmodes (Coleoptera, Carabidae, Panagaeini) èç Îðèåíòàëüíîé îáëàñòè ñ îïèñàíèåì íîâûõ ðîäà è âèäà D.N. Fedorenko Ä.Í. Ôåäîðåíêî A.N. Severtsov Institute of Ecology and Evolution, Leninsky pr. 33, Moscow 119071, Russia. E-mail: [email protected] Институт проблем экологии и эволюции им. А.Н. Северцова, Российская Академия Наук, Ленинский пр-т, Москва 119071, Россия. KEY WORDS: Coleoptera, Carabidae, Craspedophorus, Dischissus, Microcosmodes, new genus, new species, Oriental Region, Vietnam. КЛЮЧЕВЫЕ СЛОВА: Coleoptera, Carabidae, Craspedophorus, Dischissus, Microcosmodes, новый род, новый вид, Ориентальная область, Вьетнам ABSTRACT. The genus Dischissus Bates, 1873 is are easily recognizable in the field because of the dis- rendered monobasic by moving the D. notulatus species tinctive appearance. The genera Craspedophorus Hope, group to Adischissus gen.n. and transferring the re- 1838, Dischissus Bates, 1873 and Microcosmodes maining Dischissus species except D. mirandus Bates, Strand, 1936, with their characteristic elytral pattern of 1873 to the microspilotus species group of Craspe- four pale maculae, constitute the bulk of the fauna. dophorus Hope, 1838. Adischissus quadrinotatus Mots- The genus Dischissus was originally erected for a chulsky, 1865, sp. bon., is resurrected from synonymy species from Japan based on fourth tarsomere very with Dischissus notulatus (Fabricius, 1801). Microcos- deeply emarginate apically (vs. slightly emarginate in modes pallipes sp.n. from Vietnam is described. Two Craspedophorus); subsequently, other species were species, M. elegans (Dejean, 1826), comb.n. and M. added to Dischissus. Kirschenhofer [2000] outlined the laticornis (Kirschenhofer, 2000), comb.n., are trans- mirandus-group, the notulatus-group, and the sapaen- ferred from Craspedophorus to Microcosmodes. The sis-group within the genus, leaving many species unas- name M. barkeri, nom.n., is proposed for the secondary signed. These species were then divided between two junior homonym M. elegans (Barker, 1922), n.praeocc. species groups, the Afrotropical group and the Indo- Australian group [Häckel, Farkač, 2012]; the latter group РЕЗЮМЕ. Род Dischissus Bates, 1873 сужен до was then renamed guttiferus-group [Häckel, Kirschen- монотипического. Видовая группа D. notulatus повы- hofer, 2014a], whereas the sapaensis-group was trans- шена в ранге до самостоятельного рода Adischissus ferred to Craspedophorus after one of its three species gen.n., а остальные представители переведены в груп- was moved to the guttiferus-group. пу видов microspilotus рода Craspedophorus Hope, Microcosmodes includes two dozen rather small- 1838. Восстановлена валидность Adischissus quadri- sized species distributed in Africa and just two in the notatus Motschulsky, 1865, sp. bon. Microcosmodes Oriental Region to Australia. pallipes sp.n. описан Из Вьетнама. Ещё 2 вида, M. Initially, the purpose of this paper was to describe elegans (Dejean, 1826), comb.n. и M. laticornis new Oriental species, mainly from Vietnam. Yet a clos- (Kirschenhofer, 2000), comb.n., переведены в род er look at the Oriental panagaeines convinced me that a Microcosmodes из рода Craspedophorus. Вторичный new genus is needed. младший омоним M. elegans (Barker, 1922), n.praeocc., The material has been collected during several замещён новым названием M. barkeri, nom.n. expeditions to various areas of Vietnam sponsored by the Joint Russia-Vietnam Tropical Center. Holotypes Introduction and some paratypes are deposited in the Zoological Museum of the Moscow State University (ZMMU) The Oriental Region harbours a rich fauna of the and Zoological Institute, Russian Academy of Scienc- Panagaeini. Members of this tribe are medium- to large- es, St. Petersburg (ZISP), with the remaining paratypes sized, macropterous or apterous mesophiles. The adults in the author’s reference collection at A.N. Severtsov 272 D.N. Fedorenko Institute of Ecology & Evolution, Moscow (SIEE). The notulatus-group includes small species with sub- Additional material has also been studied loaned from truncate labrum, and sides of the pronotum and legs, or at Museo Civico di Storia Naturale “Giacomo Doria,” least femora, pale. This color pattern, combined with a Genova, Italy (MSNG), the Siberian Zoological Mu- very gently emarginate labrum, is also characteristic of seum at the Institute of Animal Systematics & Ecolo- Microcosmodes. Besides, the two taxa share rather wide gy, Novosibirsk (SZMN) and D.W. Wrase Collection, tarsi, with a very dense ventral pubescence. Both also Berlin (CW). tend to have antennomere 3 rather short relative to the All the labels are printed, unless marked ‘[hw]’ (= scape: it ranges between 1.08 and 1.16 (mean 1.12) in handwritten). Data on labels of type specimens are in D. notulatus, which is close to the A1L/A3L values quotes, each line separated with a slash. shown by two Microcosmodes species (0.93–1.07), but is The following parameters were analyzed: much higher than in other examined species of Dis- AnL, lengths of antennomeres 1 to 4 (n=1, 2, 3, 4); used chissus (0.80–0.91) and Craspedophorus (0.72–1.05). in the antennal ratio (AR = A1L/A3L : A2L/A3L : The guttiferus-group includes much larger species A4L/A3L); with no pale parts other than the four elytral maculae. BL, maximum body length measured between apices of They look very much like members of the Craspe- closed mandibles and elytra; dophorus microspilotus species group; this similarity is EL, maximum length of elytron; quite striking if one compares C. (Microspilotus) for- ES3L, length of metepisternum along outer margin; mosanus Jedlièka, 1939 and D. hajeki Häckel et Kir- ES3W, width of metepisternum along anterior margin; schenhofer, 2014 or D. vietnamensis Häckel et Kir- EW, maximum width of elytra; schenhofer, 2014. These species are very similar in all HW, maximum width of head across eyes; respects, including body shape and proportions, elytral OL, length of eye tubercle (eye and gena combined) pattern, and male genitalia. The differences seem to be measured from middle of preocular concavity to the at best of species level, suggesting close kinship be- neck in dorsal view; tween the guttiferus-group and C. formosanus. PL, length of pronotum along mid-line; The type species, Dischissus mirandus Bates, 1873, PLw, distance between level of maximum width and is the most distinctive member of the genus; it is large apex of pronotum, measured along mid-line; (17–19 mm in length), with venrites smooth at bases, the PW, maximum width of pronotum; penultimate labial palpomere dilated apicad and plurise- PWb, width of pronotum at base (between basal an- tose at inner margin, and the labral medial setae at a gles); distance from apical margin. This character combina- PWa, width of pronotum at apex (between apical an- tion is only seen in some Craspedophorus, primarily gles); among the sublaevis-group, while the features of the LL, length of greater apical lobe of respective tarsomere mouthparts are shared with some other Craspedopho- 4 in proportion to rus spp., such as C. mouhotii, C. angulatus, and C. LnT4, lengths of pro- or metatarsomere 4 (n=1 and 3, mandarinus. However, the internal sac of aedeagus of respectively). Measurements were taken using an eyepiece mi- Table 1. Length ratio of apical lobes of tarsomere 4 to the crometer, to two decimal places. Unless otherwise indi- total length of tarsomere 4. Таблица 1. Соотношение длин вершинных лопастей 4- cated, the number of specimens measured (n) is only го членика лапки и самого членика. given for the first ratio in the description. Species n LL/L1T4 LL/L3T4 Craspedophorus Results 3 0.34–0.39 0.26–0.28 mouhotii Within this group of genera, the apical lobes of the C. angulatus 3 0.40 0.30 fourth tarsomere are known to vary considerably in length. In many Craspedophorus those are very short C. sapaensis 3 0.38–0.41 0.34–0.39 and never exceed 2/5 length of the tarsomere (Tab. 1). Members of the sublaevis-group have the longest lobes C. laticornis 3## 0.38–0.44 0.27 within the genus (longer than in some Dischissus). Microcosmodes 3## 0.45–0.50 0.25–0.31 Other differences between Dischissus (sensu auct.) and pallipes sp.n. Craspedophorus are quantitative and otherwise poly- Dischissus mirandus # 0.46 0.46 thetic. Specifically, Dischissus species are always mac- ropterous, with slender body and longer, denser ventral D. alaticollis # 0.50 0.46 vestiture of the tarsi. In most of them, the ventrites are Craspedophorus crenate basally, the penultimate labial palpomere sub- (sublaevis) laevipennis 3 0.52–0.54 0.44–0.55 cylindric and bisetose at inner margin, and the labrum with medial setae attached close to apex; body varies Dischissus hajeki 3 0.55–0.60 0.52–0.53 considerably in size. Otherwise, the three species groups D. notulatus 3 0.56–0.68 0.56–0.66 of Dischissus differ considerably between them. sumatranus Notes on the genera Dischissus and Microcosmodes from the Oriental Region 273 D. mirandus is quite unlike that of the other mentioned superficial yet distinct on labrum, very superficial to obliterate species, due mainly to the apical sclerite being much on elytra, absent on head and pronotum. Head and pronotum smaller, poorly sclerotized, and differently shaped. very densely to confluently punctate, clypeus and neck smooth For the above reasons, I erect a new genus for the and glabrous. Antennae long, scape clearly (one-fourth to one- notulatus-group; transfer the guttiferus-group to Craspe- third) longer than eye tubercle and slightly longer than anten- nomere 3. Labrum with apical margin subtruncate and medial dophorus, merge it with the sapaensis-group, and down- setae inserted just before middle. Penultimate labial palpomere grade the latter to a subgroup of the microspilotus subcylindrical and bisetose at inner margin.