Souvanna signata (Pic, 1926) Huang & Weigel & Chang & Zhang, 2024

Huang, Gui-Qiang, Weigel, Andreas, Chang, En-Ming & Zhang, Gui-Mei, 2024, A revision of some species of Souvanna Breuning, 1963, Mispila Pascoe, 1864, and Athylia Pascoe, 1864 (Coleoptera, Cerambycidae, Lamiinae), ZooKeys 1190, pp. 107-119 : 107

Souvanna signata (Pic, 1926) comb. nov.

Figs 1 , 2

Alidus signatus Pic, 1926: 13 (type locality "Tonkin, Vietnam").

Mispila (Mispila) signata : Breuning 1961: 281 (catalogue); Breuning 1963b: 473 (key), 478 (redescription).

Enispia quadristigma Gressitt, 1940: 156 (type locality "Central Hainan: Sam-ts 'uen-kai-hui, southeast of Lai-mo-leng and Fan-ta, southeast of Nam-fung"), pl. 4, fig. 12; Gressitt 1951: 482 (catalogue); Breuning 1963c: 5; Hua et al. 2009: 76, pl 76, fig. 871 (holotype, ♂). syn. nov.

Athylia quadristigma : Breuning 1960: 166 (catalogue); Hua 1982: 69 (catalogue); Hua 2002: 197 (catalogue); Löbl and Smetana 2010: 230 (catalogue); Lin and Tavakilian 2019: 331 (catalogue); Danilevsky 2020: 323 (catalogue).

Souvanna phoumai Breuning, 1963a: 39 (type locality “région de Vientiane, Laos"), figs pp. 39 and 40; Breuning 1964b: 429; Rondon and Breuning 1970: 365 (catalogue), fig. 12h. syn. nov.

Mispila (Dryusa) coomani Breuning, 1968a [nec Mispila coomani (Pic, 1934)]: 858 (type locality "Hoa Binh, Tonkin, Vietnam"). syn. nov.

Body length.

6.5-10.7 mm (♂), 9.6 mm (♀). The gender of the types of Alidus signatus (lectotype), Souvanna phoumai (syntype), and Mispila coomani (holotype) were unknown, so the body length was determined from the types of Enispia quadristigma and additional materials examined.

Type material examined.

Alidus signatus : lectotype (MNHN), Hoa Binh Tonkin (handwritten with black ink on a rectangular white label) / type (handwritten with black ink on a rectangular white label) / Alidus signatus n sp (handwritten with black ink on a rectangular white label) / TYPE (printed with black ink on a rectangular red label) / Museum Paris Coll. M. Pic (printed with black ink on a rectangular white label with black borders); examined from three photographs (Fig. 1A-C ). Enispia quadristigma : holotype, ♂ (SYSU), Hainan Is., South China. Sam-ts’ uen-kai-hui. SE. of Lai-mo-ling (Mt. range). Ting-an Dist. July 4-6. 1935. F. K. To (printed with black ink on a rectangular yellow label) / HOLOTYPE ENISPIA 4-STIGMA J.L. Gressitt ("HOLOTYPE J.L. Gressitt" printed and "ENISPIA 4-STIGMA" handwritten with black ink on a rectangular red label) / 四点凸额天牛 Enispia quadristigma Gressitt ♂ 鉴定人:华立中 2008 ("四点凸额天牛 Enispia quadristigma Gressitt ♂ 2008" handwritten and “鉴定人:华立中” printed with black ink on a rectangular white label with black borders) / En-420876 SYS plus a QR-code (printed with black ink on a rectangular white label with black borders); examined from four photographs (Fig. 1D-G ); paratype, ♂ (CAS), Fan Ta, Hainan Id VII-17-35 (printed with black ink on a rectangular white label) / L. Gressitt Collector (printed with black ink on a rectangular white label) / L. Gressitt Collection (printed with black ink on a rectangular white label) / PARATYPE ENISPIA 4-STIGMA J.L. Gressitt ("PARATYPE J.L. Gressitt" printed and "ENISPIA 4-STIGMA" handwritten with black ink on a rectangular yellow label) / CASENT 8556282 plus a QR-code (printed with black ink on a rectangular white label with black borders); examined from four photographs (Fig. 1H-K ). Souvanna phoumai : syntype, ♂ (BPBM), région de Vientiane, Laos, XI.1962; examined from one photograph (Fig. 1L ). Mispila (Dryusa) coomani : holotype (MNHN), TYPE (printed with black ink on a rectangular red label) / Mispila (Dryusa) coomani mihi Breuning dét. Typ [" Mispila (Dryusa) coomani mihi typ" handwritten with blue ink and "Breuning dét.” printed with black ink on a rectangular white label]/ TONKIN HOA BINH A DE COOMAN (printed with black ink on a rectangular white label with black borders) / MUSÉUM PARIS 1952 COLL R OBERTHUR (printed with black ink on a rectangular white label with black borders); examined from three photographs (Fig. 1M-O ).

Additional material examined.

China • 1♂ (LPSNU, fig. 2A), Menglun Reservoir, Menglun Town , Mengla County, Xishuangbanna Dai Autonomous Prefecture , Yunnan Province, 5.XII.2016, leg. Ri-Xin Jiang. Thailand • 1♂ (CSG, fig. 2B): Ko Kut Isl. , Trat Province, 24.V-8.VI. 2022, leg. A. Skale. Vietnam • 1♂ (CWW, fig. 2C), vic. Me Linh (IEBR station) [Institute of Ecology and Biological Resources], vic. Ngoc Thanh , Thái Nguyên Province, 21°23'3"N, 105°42'44"E, Alt. 60-80 m, 12.V.2012, leg. A. Weigel • 1♀ (CWW, fig. 2D): River valley, Son O Lau , ca. 30 km NW Hue, Th ừa Thien Hu ế Province , 16°31'3"N, 107°15'36"E, Alt. 30 m, 11.V.2019, leg. A. Weigel , KL [umbrella].

Comments.

Having compared the types of M. signata (Fig. 1A, B ), A. quadristigma (Fig. 1D-F, H-J ), S. phoumai (Fig. 1L [REMOVED HYPERLINK FIELD]) and M. coomani (Fig. 1M, N ), we found that the above four species are identical; thus, we treat A. quadristigma , S. phoumai and M. coomani as junior synonyms of M. signata .

Athylia and Souvanna belong to the tribe Apomecynini , while Mispila belongs to the tribe Pteropliini . According to the key to tribes of Lamiinae and the key to genera of Apomecynini ( Rondon and Breuning 1970), the difference between Apomecynini and Pteropliini is that the middle tibiae have an outer groove in front of the apex in Apomecynini and the middle tibiae have no outer groove in front of the apex in Pteropliini . The difference between Athylia and Souvanna is that the eyes are deeply emarginated in Souvanna and subdivided in Athylia . Furthermore, according to Breuning (1964b) and our examined materials, the 3rd antennal joint is longer than the 4th in Athylia , while the 3rd antennal joint is shorter than the 4th in Souvanna . To confirm these differences, we also have examined material of Athylia avara Pascoe, 1864 from the Ternate Island (Indonesia), the type species of Athylia .

After our examination of these materials, we can confirm that this species belongs to the tribe Apomecynini , and, according to the mentioned features, it belongs to the monotypical genus Souvanna .

In the description of Alidus signatus , Pic (1926) mentioned "Long. 7-9 mill", which indicates that Pic examined at least two specimens; thus, we designate syntype examined by us (Fig. 1A, B ) as the lectotype following the recommendations of ICZN (1999; Art. 74.7).

Distribution.

China (Hainan, Yunnan), Laos (Vientiane), Thailand (Trat), Vietnam (Hoa-Binh, Thái Nguyên, Thừa Thiên Huế).

Figures

Figure 1. A-C Alidus signatus, lectotype A dorsal habitus B lateral habitus C labels D-K Enispia quadristigma D-G holotype D male dorsal habitus E male lateral habitus F male ventral habitus G labels H-K paratype H male dorsal habitus I male lateral habitus J male ventral habitus K labels L Souvanna phoumai, syntype, dorsal habitus M-O Mispila coomani, holotype M dorsal view N lateral view O labels. Scale bars: 1 mm (D-F, H-J).

Figure 2. Souvanna signata, dorsal habitus A male from Yunnan, China B male from Trat, Thailand C male from Thai Nguyen, Vietnam D female from Th ừa Thien Hu ế, Vietnam.