Fred Ruhe
Well-known member
Zafindratsaravelo B. Nomenjanahary, James P. Hansford, Karen E. Samonds, Lovasoa Ranivoharimanana & Steven M. Goodman, 2022
Sexual dimorphism and interpopulation size variation in the extinct Malagasy waterbird Alopochen sirabensis (Anseriformes: Anatidae)
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 304 (2): 115–124. doi:10.1127/njgpa/2022/1059
Abstract: Sexual dimorphism and interpopulation size variation in the extinct Malagasy waterbird Alopochen sirabensis (Anseriformes: Anatidae) - Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 304 Heft 2 — Schweizerbart science publishers
Subfossils of different land vertebrate groups dating from Madagascar’s Late Pleistocene and Holocene have been excavated, including extinct birds such as the waterbird Alopochen sirabensis (Anseriformes, Anatidae), a type of sheldgoose. Material of this species is relatively common at certain subfossil sites that today include areas with different ecosystems than a few thousand years ago when these populations were still extant. Herein we examine aspects of postcranial osteological variation in this species, using comparative data from skeletal specimens of the sole extant member of the genus, A. aegyptiacus, for extrapolation, and infer different aspects of the extinct species biology via traditional osteometric analyses. Alopochen sirabensis shows no evidence of sexual dimorphism nor geographic variation in body size. Its body mass is estimated to have been about 2.2 kg.
Enjoy,
Fred
Sexual dimorphism and interpopulation size variation in the extinct Malagasy waterbird Alopochen sirabensis (Anseriformes: Anatidae)
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 304 (2): 115–124. doi:10.1127/njgpa/2022/1059
Abstract: Sexual dimorphism and interpopulation size variation in the extinct Malagasy waterbird Alopochen sirabensis (Anseriformes: Anatidae) - Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 304 Heft 2 — Schweizerbart science publishers
Subfossils of different land vertebrate groups dating from Madagascar’s Late Pleistocene and Holocene have been excavated, including extinct birds such as the waterbird Alopochen sirabensis (Anseriformes, Anatidae), a type of sheldgoose. Material of this species is relatively common at certain subfossil sites that today include areas with different ecosystems than a few thousand years ago when these populations were still extant. Herein we examine aspects of postcranial osteological variation in this species, using comparative data from skeletal specimens of the sole extant member of the genus, A. aegyptiacus, for extrapolation, and infer different aspects of the extinct species biology via traditional osteometric analyses. Alopochen sirabensis shows no evidence of sexual dimorphism nor geographic variation in body size. Its body mass is estimated to have been about 2.2 kg.
Enjoy,
Fred
