White-chinned Petrel

SCI Name:  Procellaria aequinoctialis
Protonym:  Procellaria aequinoctialis Syst.Nat.ed.10 p.132
Taxonomy:  Procellariiformes / Procellariidae / Procellaria
Taxonomy Code:  whcpet1
Type Locality:  Cape of Good Hope. Type from South Georgia, fide Dabbene, 1923, Hornero, 3, p. 5
Author:  Linnaeus
Publish Year:  1758
IUCN Status:  Vulnerable

DEFINITIONS

PROCELLARIA
(Procellariidae; Ϯ White-chinned Petrel P. aequinoctialis) Mod. L. procellarius  of the storm  < L. procella  storm, gale  < procellere  to cast down  < pro  before, of; -cello  quick, speedy  < celer, celeris  quick; the White-chinned Petrel seems at home in the most violent tempests, and was described from the waters of the Cape of Good Hope (originally known as the Cape of Storms); "64. PROCELLARIA.  Rostrum edentulum, subcompressum: Mandibulis æqualibus: superiore apice adunca; inferiore apice compresso-canaliculata.  Nares cylindro supra basin rostri decumbente, truncato.  Pedes palmati: ungue postico sessili absque digito.  ...  Procellariæ aves pelagicæ sunt, nec ad continentis, littora conspiciuntur, exposit a omnibus procellis." (Linnaeus 1758); "Procellaria Linné, Syst. Nat., ed. 10, 1, 1758, p. 131. Type, by subsequent designation, Procellaria æquinoctialis Linné (Gray, List Gen. and Subgen. Bds., 1840, p. 78)." (Peters 1931, I, 52). Linnaeus's Procellaria comprised three species (P. pelagica, P. æquinoctialis, P. capensis). 
Var. Porcellaria.
Synon. Adamastor, Cymatobolus, Majaqueus, Priofinus.

aequinoctialis
L. aequinoctialis  equinoctial, equatorial  < aequinoctium  equinox  < aequus  equal; nox, noctis  night.
● Christmas I., Line Is.; ex “Equinoctial Warbler” of Latham 1787 (Acrocephalus).
● Cayenne; ex “Aequinoctial Eagle” of Latham 1781 (Buteogallus).
● Cayenne; ex “Figuier olive de Cayenne” of d’Aubenton 1765-1781, pl. 685, fig. 1, and “Equatorial Warbler” of Latham 1783 (Geothlypis).
● Cape of Good Hope; "64. PROCELLARIA.  ...  æquinoctialis.  2. P. fusca immaculata, rostro flavo.  Peteril magna nigra. Edw. av. 89. t. 89.  Habitat ad Cap. b. Spei." (Linnaeus 1758) (Procellaria).
● "76. ARDEA.  ...  æquinoctialis.  19. A. capite lævi, corpore albo, remigibus duabus primis margine exteriore fuscis. Rolander.  Habitat in America.  Simillima Ibidi tota structura; av vero Remiges primores omnes apice fuscescentes, & 1, 2 etiam margine exteriore longitudinali fuscæ, cæterum eadem, ut facile pro varietate agnoscatur." (Linnaeus 1758) (nom. dub.; ??syn. Egretta thula).