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Revision of the Anthidiellum Cockerell, 1904 of China (Hymenoptera, Apoidea, Megachilidae, Anthidiini)

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Revision of the Anthidiellum Cockerell, 1904 of China (Hymenoptera, Apoidea, Megachilidae, Anthidiini) Zootaxa 4127 (2): 327–344 ISSN 1175-5326 (print edition) http://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2016 Magnolia Press ISSN 1175-5334 (online edition) http://doi.org/10.11646/zootaxa.4127.2.5 http://zoobank.org/urn:lsid:zoobank.org:pub:0586127D-1607-4FAF-80AE-27EB476CBB7C Revision of the Anthidiellum Cockerell, 1904 of China (Hymenoptera, Apoidea, Megachilidae, Anthidiini) ZE-QING NIU1, JOHN S. ASCHER2, A-RONG LUO1,3, TERRY GRISWOLD4 & CHAO-DONG ZHU1, 5 1Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing, 100101, P. R. China. E-mail: [email protected] 2 Department of Biological Sciences National University of Singapore, 14 Science Drive 4, Singapore 117543. E-mail: [email protected] 3E-mail:[email protected] 4USDA-ARS Bee Biology & Systematics Laboratory, Utah State University, Logan, Utah 84322-5310, USA. E-mail: [email protected] 5Corresponding author. E-mail: [email protected] Abstract The resin bees of the genus Anthidiellum Cockerell, 1904 are revised for China. Seven species are confirmed to occur in China including five new combinations: A. (Pycnanthidium) carinatum (Wu, 1962) comb. nov., A. (P. ) coronum (Wu, 2004a) comb. nov., A. (P. ) latipes (Bingham, 1897) comb. nov., A. (Clypanthidium) popovii (Wu, 1962) comb. nov., and A. (Anthidiellum) yunnanensis (Wu, 1962) comb. nov.. These five species had previously been classified as Trachusa (Paraanthidium), which is characterized by much larger-bodied bees (only four species of Trachusa (Paraanthidium) are confirmed to occur in China after this study; others reported in the literature were misplaced to genus). Additionally, An- thidiellum ludingensis Wu, 1993, and Anthidiellum (Anthidiellum) xinjiangensis Wu, 2004b, are removed from Anthidiel- lum forming the new combinations Pseudoanthidium (Pseudoanthidium) ludingense (Wu, 1993) and P. (P.) xinjiangense (Wu, 2004b), thus extending the range of the genus in China to include Sichuan. Illustrations and a key to known Chinese Anthidiellum species are provided. Kew words: Apiformes, taxonomy, combination, China, fauna Introduction Anthidiellum was erected by Cockerell (1904) as a subgenus of Anthidium and subsequently elevated to generic status (Schwarz, 1926). Pasteels (1969) in a generic treatment of Anthidiini for the Eastern Hemisphere expanded Anthidiellum to include three additional subgenera: Pycnanthidium Krombein, Ananthidiellum Pasteels and Ranthidiellum Pasteels, which are all present in southern Asia (the latter two taxa are endemic). A subsequent revision of Indo-Malaysian Anthidiini (Pasteels, 1972) included 10 species of Anthidiellum. Engel (2009) described a new species in subgenus Ranthidiellum from Thailand and reviewed the subgenus. A generic revision of Eastern Hemisphere Anthidiini (Michener & Griswold 1994) added the subgenus Clypanthidium Pasteels to the Asian fauna. In addition, two species of the anthidiine genus Dianthidium (Dianthidium riparium Cockerell, 1929 from Thailand and Dianthidium selangorense Cockerell, 1927 from Peninsular Malaysia) were described from Southeast Asia and have been cited as such in an online compilation of world bees (Ascher and Pickering, 2015). Anthidiellum was first recorded from China by Wu (2004b) who described three new species (A previous description of the genus Anthidiellum (Wu, 1993) was an incorrectly assigned to the genus. See below). The genus Anthidiellum has been poorly studied in China because Wu (2004b, 2006) classified species belonging to genus Anthidiellum and other small-bodied anthidiine genera in Paraanthidium and Trachusa (Paraanthidium). The genus Trachusa are characteriszed by large body size, and only four species has been confirmed in China: T. (Paraanthidium) longicornis (Friese, 1902), T. (P.) maai (Mavromoustakis, 1953), T. (P.) muiri Mavromoustakis, 1936, and T. (P.) xylocopiformis (Mavromoustakis, 1954). Here based on the information Accepted by V. Gonzalez: 27 Apr. 2016; published: 23 Jun. 2016 327 of the previous publications and examination of the collection in the Insect Collection of the Institute of Zoology, Chinese Academy of Sciences, Beijing, China (IZCAS), we transfer five species from Trachusa to Anthidiellum and reclassified two species of Anthidiellum in the genus Pseudoanthidium, resulting in seven species of Anthidiellum known from China (Table 1). Material and methods All specimens examined in this study are deposited in the Insect Collection of the Institute of Zoology, Chinese Academy of Sciences, Beijing, China (IZCAS). The specimens were examined with a Nikon SMZ 1500 stereomicroscope and images were recorded with a Nikon D7000 digital camera. The morphological terminology used in the key follows Michener (2007). Abbreviations T and S in the key respectively denote terga and sterna. TABLE 1. Summary of species of Anthidiellum currently recognized from China with information on the known sex and distribution. Sex: ♂= male; ♀= female. Species Previous name Sex known Distribution in China Anthidiellum (Anthidiellum) boreale Wu, Anthidiellum (s. str.) borealis [sic] ♀♂ Beijing, Hebei, Heilongjiang, 2004 Wu, 2004b Jilin, Shandong, Sichuan. Anthidiellum (Anthidiellum) scutellatum Anthidiellum (s. str.) scutellatum ♂ Xinjiang. Wu, 2004 Wu, 2004b Anthidiellum (Anthidiellum) yunnanense Trachusa (Paraanthidium) ♀♂ Sichuan, Yunnan. (Wu, 1962), comb. nov. yunnanensis (Wu, 1962) Anthidiellum (Clypanthidium) popovii Trachusa (Paraanthidium) popovii ♀ Yunnan. (Wu, 1962), comb. nov. (Wu, 1962) Anthidiellum (Pycnanthidium) carinatum Trachusa (Paraanthidium) ♀♂ Hainan, Yunnan. (Wu, 1962), comb. nov. carinatum (Wu, 1962) Anthidiellum (Pycnanthidium) coronum Trachusa (Paraanthidium) ♀ Yunnan. (Wu, 2004), comb. nov. coronum [sic] Wu, 2004a Anthidiellum (Pycnanthidium) latipes Trachusa (Paraanthidium) latipes ♀♂ Yunnan. (Bingham, 1897), comb. nov. (Bingham, 1897) Systematics Anthidiellum Cockerell, 1904 Anthidium (Anthidiellum) Cockerell, 1904: 3. Type species: Trachusa strigata Panzer, 1805, by original designation. Anthidiellum (Ananthidiellum) Pasteels, 1969: 49. Type species: Anthidium anale Friese, 1914, by original designation. Anthidium (Cerianthidium) Friese, 1923: 304. Type species: Trachusa strigata Panzer, 1805, by designation of Cockerell, 1925: 361. Anthidiellum (Chloranthidiellum) Mavromoustakis, 1963: 491. Type species: Anthidium flavescens Friese, 1925, by original designation. Anthidiellum (Chloranthidium) Pasteels, 1969: 48, lapsus for Chloranthidiellum Mavromoustakis, 1963. Bathanthidium (Clypanthidium) Pasteels, 1968: 1060. Type species: Anthidium ruficeps Friese, 1914, by original designation. [Also described as new by Pasteels, 1969: 53.] Anthidiellum (Loyolanthidium) Urban, 2001: 64. Type species: Anthidium apicale Cresson, 1878, by original designation. Pycnanthidium Krombein, 1951: 292. Type species: Pycnanthidium solomonis Krombein, 1951, by original designation. Pygnanthidium Mavromoustakis, 1963: 491, unjustified emendation of Pycnanthidium Krombein, 1951. Pygnanthidium (Pygnanthidiellum) Mavromoustakis, 1963: 492. Type species: Anthidium zebra Friese, 1904, by original designation. Anthidiellum (Ranthidiellum) Pasteels, 1969: 48. Type species: Protoanthidium rufomaculatum Cameron, 1902, by original designation. [For aspects of this type designation, see Michener and Griswold, 1994: 312] Anthidiellum (Rhanthidiellum) Pasteels, 1972: 102, unjustified emendation of Ranthidiellum Pasteels, 1969. 328 · Zootaxa 4127 (2) © 2016 Magnolia Press ZHU ET AL. Diagnosis. Body small (length less than 8mm), robust, rotund, metasoma oval-rounded, with strong carinae or lamellae (notably on the scutellum). Color black, often with maculae laterally or with unbroken bands on terga; juxtantennal carinae absent; subantennal suture usually arcuate outward; axilla rounded, without spine; scutoscutellar suture open; scutellum without lateral teeth, extending posteriorly as broad, thin, truncate or medially emarginated lamella overhanging metanotum and propodeum; propodeum with a fovea defined by carina behind the propodeal spiracle, but the fovea sometimes not larger than spiracle; jugal lobe of hind wing less than half as long as vannal lobe, vein cu-v less than half as long as second abscissa of M+Cu; arolia well developed; mandible of female with three or four teeth; male with two or three teeth. Remarks. Wu (2004b) inadvertently indicated arolia absent as one of characters of Anthidiellum. In fact, arolia are present in the species of this genus (Banaszak & Romasenko, 1998, Michener, 1944, 1948, 2000, 2007, Michener & Griswold, 1994). Key to Chinese species of Anthidiellum 1. Flagellum 11-segmented, male . 2 -. Flagellum 10-segmented, female . 6 2. S5 without comb of black teeth . 3 -. S5 with comb of black teeth (Figs. 8g, 11g) . 5 3. Omaular carina with a shallow concavity on upper margin (Figs. 2f, 3f); scutellum with posterior margin distinctly angled inward to midpoint (Fig. 3d); paraocular area with yellow maculation extending above antennal socket (Fig. 3b) . 4 -. Omaular carina straight, without a shallow concavity on upper margin (Fig. 5f); scutellum with posterior margin broadly rounded outward except for narrow, shallow notch medially (Fig. 5d); paraocular area with yellow maculation not extending above antennal socket (Fig. 5b). Anthidiellum (Anthidiellum) yunnanense (Wu, 1962) 4. Apical margin of T6 with well-developed lateral lobe in addition to medial spike (Fig. 3g); T2 coarsely punctate
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