Psittaculirostris desmarestii (Desmarest, 1826), Phalacrocorax aristotelis desmarestii (Payraudeau, 1826) and others (1 Viewer)

[Taphrospilus]

Psittaculirostris desmarestii (Desmarest, 1826) OD here
Why Desmaret author? I would go either for Charles Henri Frédéric Dumont de Sainte Croix (oiseaux) or Lesson and Garnot (p.89) Something similar to discussion here.
Phalacrocorax aristotelis desmarestii (Payraudeau, 1826) OD here

Je dédie cette espèce à M. Desmaret, dont les nombreaux travaux contribuent si puissamment, chaque jour, aux progrès des science naturelles,

Pipra desmareti Leach, 1814 OD here

It is named after Desmaret, author of a most splendid work on this genus of birds.

Calliste Desmarestii Sclater, PL, 1857 OD here and plate (may not the correct OD as references to other publications)
Calliste desmaresti G. R. Gray, 1844 OD here probably same here Calliste Desmaresti Sclater, PL, 1851
Tangara desmaresti (Vieillot, 1819) OD here
Platysteira desmarestii Jardine & Selby, 1830 OD here

I must admit I am a little bit confused with the Tanagers

The Eponym Dictionary of Birds

Brassy-breasted Tanager Tangara desmaresti Vieillot, 1819
Desmarest's Fig Parrot Psittaculirostris desmarestii Desmarest, 1826 [Alt. Large Fig Parrot]
European Shag ssp. Phalacrocorax aristotelis desmarestii Payraudeau, 1826
Anselme Gaetan Desmarest (1784–1838) was a French zoologist and palaeontologist. He wrote Histoire Naturelle des Tangaras, des Manakins et des Todiers (1805) and Considérations Générales sur la Classe des Crustacés – et Description des Espèces de ces Animaux, qui Vivent dans la Mer, sur les Côtes, ou dans les Eaux Douces de la France (1825) and was co-author of the Dictionnaire des Sciences Naturelles (insects and crustaceans) (1816–1830). Many other taxa including four mammals are named after him.

The Key to Scientific Names

Anselme Gætan Desmarest (1784-1838) French zoologist (syn. Dicaeum hirundinaceum, subsp. Gulosus aristotelis, syn. Platysteira cyanea ♀, Psittaculirostris, Tangara (ex “Tangara rouverdin, femelle” of Desmarest 1805), syn. Tangara viridissima (ex “Tanagra gyrola” of Swainson 1829)).

Wikipedia claims him as Anselme Gaëtan Desmarest

Death record (cote EDPOT/MAISONSALFORT/1E 12) here p. 65/170

I wouldn't write him Gætan but give it to discussion (as well as the synonyms).

 

[l_raty]

Listing them according to the sequence currently used in the Key :

• Pipra desmareti Leach 1814 -- now syn. Dicaeum hirundinaceum (Shaw 1792)

Pipra desmareti Leach, 1814 OD here

It is named after Desmaret, author of a most splendid work on this genus of birds.

• Carbo desmarestii Payraudeau 1826 -- now Gulosus aristotelis desmarestii (Payraudeau 1826)

Phalacrocorax aristotelis desmarestii (Payraudeau, 1826) OD here

Je dédie cette espèce à M. Desmaret, dont les nombreaux travaux contribuent si puissamment, chaque jour, aux progrès des science naturelles,

• Platyrhynchus desmarestii Jardine & Selby 1830 -- now syn. Platysteira cyanea (Statius Müller 1776).

Platysteira desmarestii Jardine & Selby, 1830 OD here

This not the actual OD, though. The OD is this, in the first volume of the work. Dedication :​

We have named this species in honour of the distinguished naturalist who first characterised the genus.

• Psittacus desmarestii (Desmarest 1826), now Psittaculirostris desmarestii (Desmarest 1826).

Psittaculirostris desmarestii (Desmarest, 1826) OD here
Why Desmaret author? I would go either for Charles Henri Frédéric Dumont de Sainte Croix (oiseaux) or Lesson and Garnot (p.89) Something similar to discussion here.

Ex Lesson & Garnot. "Dedication" :​

12 1. Psittacule Desmarest; Psittacus Desmarestii, Lesson et Garnot. Cette charmante espèce, que MM. Garnot et Lesson ont bien voulu me dédier, [...]

The above implies directly that the dedicatee (i.e., Desmarest) was the author of the text.​

The "Perroquet; Psittacus, Linn. (Ornith.)" entry in this volume the Levrault Dictionnaire (which makes up p. 1 to p. 137) is signed "(DESM.)" on p. 137.​

• Tanagra desmaresti Vieillot 1819 -- now Tangara desmaresti (Vieillot 1819).

Tangara desmaresti (Vieillot, 1819) OD here

Definitely not "ex “Tangara rouverdin, femelle” of Desmarest 1805" -- Vieillot's species does not remotely look like the bird on this Desmarest plate.​

Dedication :​

Le nom que j'ai consacré à cet oiseau du Brésil, est celui du judicieux et savant auteur de l'Histoire des Tangaras.

• Calliste desmarestii Gray 1844 -- now syn. Tangara viridissima (Lafresnaye 1847).

Calliste Desmarestii Sclater, PL, 1857 OD here and plate (may not the correct OD as references to other publications)
Calliste desmaresti G. R. Gray, 1844 OD here probably same here Calliste Desmaresti Sclater, PL, 1851

Sclater (1851, 1857) was merely using Gray's 1844 name.​

Based on a plate called (improperly in Gray's opinion) Tanagra / Aglaia gyrola Linnaeus by Swainson in 1829: here.​

In 1857, Sclater listed "Tangara rouverdin, femelle, Desm. Tan. pl. 7 (?)" tentatively in the synonymy of the present bird (and not, thus, in that of Vieillot's Tanagra desmaresti, which is a very different species). Desmarest's bird had not been originally cited by Gray, however.​

No dedication; intention likely to have been similar to that of Vieillot above.​

This one is lacking in the Key :

• Tachyphonus desmaresti Swainson 1825 -- now syn. Tachyphonus surinamus (Linnaeus 1766).

OD here. Dedication :​

I therefore feel happy in recording it under the name of Desmaresti, as a just tribute of respect to that celebrated ornithologist, who has illustrated the Tanagrae of Linnaeus in one of the most splendid publications of the present day.

Wikipedia claims him as Anselme Gaëtan Desmarest

Death record (cote EDPOT/MAISONSALFORT/1E 12) here p. 67/179

I wouldn't write him Gætan but give it to discussion (as well as the synonyms).

In the death record (which is actually on p. 65/170) his name is spelled 'Gaëtan'.
Nowadays, this name would be spelled either 'Gaëtan', or 'Gaétan' (but there has been a trend in French to replace former ë by é/è -- e.g., former poëte became poète -- and is is quite possible that the spelling 'Gaétan' simply did not exist two centuries ago).
The ligature ('æ') and the diaeresis ('aë') have diametrally opposed effects -- the former forces the pronunciation of the two letters as a single sound (in most cases equivalent to é), the latter prevents this -- hence they are in principle not at all interchangeable. A side issue is that g followed by æ should probably be pronounced as if followed by é (see 'longævité', an obsolete spelling of 'longévité', which was pronounced like the latter), not as if followed by a, which is how it is pronounced in Gaëtan (\ɡa.e.tɑ̃\). 'Gætan' (\ʒe.tɑ̃\ ?) looks very unusual to me.

 

[Taphrospilus]

• Tanagra desmaresti Vieillot 1819 -- now Tangara desmaresti (Vieillot 1819).

Definitely not "ex “Tangara rouverdin, femelle” of Desmarest 1805" -- Vieillot's species does not remotely look like the bird on this Desmarest plate.​

Dedication :​

Sure is the Brassy-breasted Tanager (Tangara desmaresti (Vieillot, 1819)) (full species)

 

[l_raty]

Definitely not "ex “Tangara rouverdin, femelle” of Desmarest 1805" -- Vieillot's species does not remotely look like the bird on this Desmarest plate.

In 1857, Sclater listed "Tangara rouverdin, femelle, Desm. Tan. pl. 7 (?)" tentatively in the synonymy of the present bird (and not, thus, in that of Vieillot's Tanagra desmaresti, which is a very different species). Desmarest's bird had not been originally cited by Gray, however.

Desmarest suggested that the bird he called "Tangara rouverdin, femelle, Desm. Tan. pl. 7 (?)" was possibly the specimen called "Tangara tacheté de Cayenne" on Pl. Enl. 301; this bird is the type specimen of Tanagra varia Statius Müller 1766, now Tangara varia or Dotted Tanager. Desmarest's identification of this bird as a female Tanagra gyrola -- Bay-headed Tanager -- was explicitly tentative. He described this bird as uniform green in colour (like Bay-headed Tanager; not with black-spotted upperparts, despite the bird being called 'tacheté' in Pl. Enl.), and similar to Bay-headed Tanager in size, structure, and green tone, but lacking that species' blue breast, yellow wing patch, and maroon head -- the head being, instead, of a sightly browner green than the rest of the bird, with some small rufous feathers visible on the forehead.

Vieillot described his Tanagra desmaresti as having a black forehead, a black patch of the foreneck, the top of the head aquamarine blue, the nape, head sides, chin and breast yellow, the mantle and wing coverts yellow and black, and the flight and tail feathers of the same colours but with the yellow restricted to the feathers' outer edges -- none of which might be interpreted as matching Desmarest's description : there seems to be no reason to think that Vieillot might have had this bird in mind when he coined the name for something entirely different.
Vieillot subsequently (pt.2 - Tableau encyclopédique et méthodique des trois règnes de la nature - Biodiversity Heritage Library) indicated that his Tanagra desmaresti was known thanks to M. Delalande, who had brought it back from Brazil. Delalande collected in Brazil in 1816 : this provides a quite good reason, on the contrary, to think that Vieillot, when he coined the name, had a specimen in mind that he knew full well could not possibly have been illustrated by Desmarest in 1806.

OTOH, even though it's not really possible to be positive about this, Gray 1844 might conceivably have had Desmarest's bird in mind when he renamed the bird illustrated by Swainson. (He might have avoided associating it to the name because he did not feel certain, and wanted to stick to solid ground.)