A confusing situation here:
PTERNISTIS, Wagl. (1832). Tetrao, Gm. Perdix, Lath. Fran- colinus, Steph. P. capensis, (Gm.) Wagl. Forst.Dr.135. P. Cranchii, (Leach) Wagl. P. punctulata, J.E.Gray. Ill.Ind. Zool.,pl.The basis for Peters interpretation of capensis as the type is based on its initial position in the sequence, which I understand from Murray Bruce and others is taken to be the convention at that time for type designation. I infered that T. capensis Gmelin was held (? by Peters) to be a synonym of T. afer Muller.
1. Pternistes nudicollis.
Le Gorge-nue, Buffon, Hist. Nat. ii. p.444 (1771) Bare-necked Partridge, Lath. Gen. Syn. ii. p.759 (1783). Tetrao nudicollis, Bodd. Tabl. Pl. Enl. p.11. no.180 (1783); Gmel. Syst. Nat. i. p.759 (1788). Perdix nudicollis, Lath. Ind. Orn. ii. p.644 (1790); Bonnat. Tabl. Encycl. Méth. i. p.215 (1791); Temm. Pig. et Gall. iii. pp.317 720 (1815)[part.]; Vieill. N. Dict. d'Hist. Nat. xxv. p.236 (1817); Less. Traité d'Orn. p.504 (1831). Francolinus capensis, Steph. in Shaw's Gen. Zool. xi. p.333 (1819) [part.]. Pternistis capensis, Wagl. Isis, 1832, p.1229. Pternistes nudicollis, Gray, List Gall. B. iii. p.32 (1844); Blyth, Cat. B. Mus. As. Soc. p.250 (1849); Sharpe, in Layard's B. S. Afr. p.589 (1884) [Maritime Dist. of Cape Colony: Swellendam to E. London]; Grant, Ibis, 1892, p.53 Francolinus nudicollis, Gray, Gen. B. iii. p.506 (1846): Layard, B. S. Afr. p.268 (1867); Gray, List Gallinæ Brit. Mus. p.48 (1867); Layard, Ibis, 1869, p.375; Gray, Hand-l. B. ii. p.264, no.9647 (1870); Barratt, Ibis, 1876, p.206 [Lydenburg: Cha- lumna, Brit. Kaffaria]; Holub u. Pelz. Orn.S.-Afr. p.187 (1882); Schaeck, Mém. Soc. Zool. Fr. iv. p.314 (1891).
... the name of the type has been applied to more than one taxon over time. The two species that must NOT be confused are:
What confuses things is that when Wagler established Pternistis, he called this bare-throated taxon 'Pternistis capensis' based on part of Stephens in Shaw's (1819) 'Francolinus capensis', so if this was quoted in full it would be something like:
If Peters had copied the citation in W. L. Sclater (1930: 90)
properly he would have put
P. capensis Wagl. = Tetrao afer Müll.
in the check-list, and not what he did put -- saving you a great deal of trouble!
Assuming that the above is correct the citation should be:
Wagler's name 'P. capensis' for the first included species is not Tetrao capensis Gmelin, 1789. G. R. Gray lists this name first, with the other names belonging to a taxon only subspecifically distinct.
A certain 'leeway' is given to pre-1931 names, both in what constitutes a
valid description, and a subsequent designation.
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PUCRASIA, G.R. Gray (1841). Eulophusa, Less. (1837). Pha- sianus, J.E. Gray. Tragopan, Temm. Satyra, Less. Ce- riornis, Swains. P. macrolopha, (Less.) G.R. Gray P. pucrasia, J.E. Gray. Ill.Ind.Zool.,pl. T. Duvaucelii, Temm.