Petersenidia scaphella ( Chen, 1957 )

Okayasu, Juriya, Lelej, Arkady S., Williams, Kevin A., Brabant, Craig M., Nguyen, Lien Thi Phuong, Nguyen, Anh Duc, Pham, Thai Hong & Truong, Tuong Thi Cat, 2025, Current knowledge on the velvet ants (Hymenoptera: Mutillidae, Myrmosidae) of Vietnam: faunal review and new distributional records, Zootaxa 5668 (1), pp. 1-104 : 67-68

Petersenidia scaphella ( Chen, 1957)

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( Figs 23E, 23F)

Smicromyrme scaphella Chen, 1957: 187 , ♂, holotype ♂ ( Tachulan [= Dazhulan ], Shaowu, Fukien [= Fujian], China) [ TARI]; He et al. 2004: 956, ♂ .

Petersenidia scaphella : Lelej & Yamane 1992: 629; Lelej 1996b: 10, ♂; Lelej 2005: 72; Hua 2006: 300; Pagliano et al. 2020: 257.

Material examined. 3♂. Vietnam: LAO CAI: Sapa, Tram Ton , 1926 m alt., 22°21.182'N 103°46.49'E, 23.VI.2012, T. Mita leg. [1♂ VNMN] ; HA TINH: Vu Quang NP, 18°19'38"N 105°26'28"E, 116 m, 23.IX–5.X.2009, C. van Achterberg & R. de Vries leg., malaise [2♂ RMNH] .

Identification source. Compared with types [ TARI] .

Previous record. This species was recorded from Ha Son Binh (now Hoa Binh) by Lelej (1996b).

Distribution. China. Vietnam: Lao Cai *, Hoa Binh, Ha Tinh *.

Occurrence in Vietnam. June, September, October. Northern Indochina subtropical forests and Northern Annamites rain forests ecoregions. 116–1926 m alt. Forest.

Sex association. Female unknown.

Remarks. This male seems likely to be eventually associated with either Pe. dorsispinata or Pe. leleji .

Genus Promecidia Lelej, 1996

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Promecidia Lelej, 1996b: 15 , ♀; Lelej 2005: 80, ♂ ♀; Lelej & Brothers 2008: 47 ; Lelej et al. 2016: 105 , ♂ ♀; Pagliano e t al. 2020: 257. Type species: Promecidia yamanei Lelej, 1996 (♀), by original designation.

Diversity and distribution. This genus is widespread in the Oriental Region with 12 species ( Lelej et al. 2016; Williams et al. 2019b; Lelej 2024).

Remarks. This genus was reviewed by Lelej et al. (2016). However, many undescribed species are recognized from East Asia (JO pers. obs.). Females of Orientidia and Promecidia are easily confused by having two pale setal spots on the metasomal tergum 2 and the pygidial plate smooth and convex ( Williams et al. 2019b). However, they are clearly distinguished by the male morphology ( Lelej 1996b, 2005).