Heterophlebus ambiguus ( Philippi, 1865 )

González, Christian R., Elgueta, Mario & Rafael, José Albertino, 2021, A catalog of the Brachystomatidae of Chile (Diptera: Empidoidea), Zootaxa 4969 (1), pp. 149-165 : 157-158

Heterophlebus ambiguus ( Philippi, 1865)

Brachystoma (Heterophlebus) ambigua Philippi, 1865: 764 .

Brachystoma (Heterophlebus) melanogastra Philippi, 1865: 764 .

Blepharoprocta ambigua: Bezzi, 1905: 456 (list).

Blepharoprocta melanogastra: Bezzi, 1905: 456 (list).

Blepharoprocta (Heterophlebus) ambigua: Kertész, 1909: 2 (cat.).

Blepharoprocta (Heterophlebus) melanogastra: Kertész, 1909: 2 (cat.).

Brachystoma (Blepharoprocta) ambigua: Melander, 1928: 13 (list).

Brachystoma (Blepharoprocta) melanogastra: Melander, 1928: 13 (list).

Oreogeton ambigua: Collin, 1933: 55 (in key), 72–73, figs. 14c-d (redes.).

Oreogeton melanogastra: Collin, 1933: 72 (as syn. of ambiguus ).

Heterophlebus ambiguus: Yang et al., 2007: 453 (cat.).

Heterophlebus melanogaster: Yang et al., 2007: 453 (cat. as syn. of ambiguus ).

Syntypes. Heterophlebus ambiguus : without indication of number and sex (not at MNNC, presumably lost), Chile: Valdivia .

Heterophlebus melanogaster : two females (not at MNNC, presumably lost), Chile: Corral and San Juan .

Distribution. Chile: Región de Los Ríos: Valdivia Province (Corral, Valdivia), Ranco Province (San Juan); Región de Los Lagos: Llanquihue Province (Casa Pangue, Puerto Montt, Puerto Varas); Chiloé Province (Castro, Isla Mechuque).

References. Reed, 1888: 301 (cat.); Stuardo, 1946: 105 (cat.); Smith, 1967: 17 (cat); Camousseight, 2005: 91 (list); Rafael & Chagas, 2014: 438 (list).

Remarks. Both species were described on the same page by Philippi (1865) and H. melanogaster was described before H. ambiguus . Both were synonymized with a question mark “?” by Collin (1933) and this nomenclatural act was followed by subsequent authors ( Smith, 1967; Yang et al., 2007) with no comments. This dubious synonymy never was checked, nor confirmed and here we are maintaining the synonymies as considered by Collin (1933).