Laysan Duck

Here the details of the Laysan Duck named bird below:

SCI Name:  Anas laysanensis
Protonym:  Anas laysanensis Bull.Br.Orn.Club 1 p.17
Taxonomy:  Anseriformes / Anatidae / Anas
Taxonomy Code:  layduc
Type Locality:  Laysan Island.
Author:  Rothschild
Publish Year:  1892
IUCN Status:  Critically Endangered

DEFINITIONS

ANAS
(Anatidae; Ϯ Mallard A. platyrhynchos) L. anas, anatis  duck.  The Mallard is the wild ancestor of the farmyard duck and its many domesticated forms; "61. ANAS.  Rostrum lamelloso-dentatum, convexum, obtusum.  Lingua ciliata, obtusa." (Linnaeus 1758); "Anas Linnaeus, 1758, Syst. Nat., ed. 10, p. 122. Type, by subsequent designation (Lesson, 1828, Man. Ornith., 2, p. 417), Anas boschas Linnaeus = Anas platyrhynchos Linnaeus." (Johnsgard in Peters, 1979, I, ed. 2, p. 460).  Linnaeus's Anas comprised thirty-nine species (A. Cygnus, A. Cygnoid, A. Tadorna, A. spectabilis, A. fusca, A. nigra, A. Anser, A. erythropus, A. canadensis, A. cærulescens, A. Bernicla, A. mollissima, A. moschata, A. bahamensis, A. Albeola, A. clypeata, A. platyrhynchos, A. strepera, A. bucephala, A. Clangula, A. rustica, A. perspicillata, A. Glaucion, A. Penelope, A. acuta, A. hyemalis, A. ferina, A. Querquedula, A. Crecca, A. histrionica, A. minuta, A. Circia, A. autumnalis, A. Boschas, A. adunca, A. galericulata, A. Sponsa, A. arborea, A. Fuligula).    
Var. Annas, Anos, Anus, Asnas.   
Synon. Aethiopinetta, Afranas, Aldabranas, Archeoquerquedula, Boschas, Crecca, Dafila, Dafilonettion, Dafilula, Elasmonetta, Horizonetta, Melananas, Micronetta, Nesonetta, Nettion, Notonetta, Pachyanas, Paecilonitta, Phasianurus, Philippinetta, Polionetta, Trachelonetta, Virago, Xenonetta.

laysanensis
Laysan I., Northwestern Chain, Hawaiian Is.