Protandrena aestivalis (Provancher, 1882)

Panurgus aestivalis Provancher, 1882c: 205 [♂, ♀].

     Lectotype ♀, designated by Mitchell (1960: 271)Sheffield and Perron (2014: 128). CANADA, Quebec, Cap Rouge [ULQC]. 

Panurginus Nebrascensis Crawford, 1903: 335 [♂, ♀]. Synonymy by Sheffield and Perron (2014: 127).

     Syntypes ♂‚,♀. USA, Nebraska, Lincoln and West Point, 24 August to 11 September [no year provided], by J.C. Crawford, collected in copula on Solidago rigida, S. Misouriensis and Grindelia squarrosa []

Pseudopanurgus (Heterosarus) nebrascensis timberlakei Michener, 1947: 446 [♂‚,♀] [preoccupied; not Cockerell 1931]

     Holotype ♂‚. USA, Mississippi, Hattiesburg, 6 October 1944 [AMNH]

Pseudopanurgus (Heterosarus) nebrascensis muesebecki Michener, 1951: 1100 [replacement name] [synonymy by Sheffield and Perron 2014: 127]

Taxonomic notes: As correctly pointed out by Robinson (2023: 38), the lectotype desgination of Mitchell (1960: 271) is considered valid as he referred to the "type", so the desgination of Sheffield and Perron (2014: 127) was not required.

Robinson (2023: 37) also correctly indicated that Sheffield and Perron (2014: 127) incorrectly referred to the type material of P. Nebrascensis Crawford as a holotype, but also indicated that a lectotype ♂ was designated by Crawford (1912: 368). However, without providing any information on this specimen, including where it was held, Crawford's (1912: 368) did not unambiguously distinguish the male specimen at the USNM [no. 8235; USNM ENT 00533809, from Lincoln, Nebraska] as the lectotype as the syntype series contained 20♂ from both Lincoln and West Point, Nebraska.