[PaleoOrnithology • 2025] Daniadyptes primaevus, Waiparadyptes gracilitarsus, Archaeodyptes waitahaorum & Waimanutaha kenlovei • Multiple exceptionally preserved Fossils from the Paleocene Waipara Greensand inform the Diversity of the Oldest stem group Sphenisciformes and the Formation of their Diving Adaptations

 

Daniadyptes primaevus gen. et sp. nov., Waiparadyptes gracilitarsus gen. et sp. nov., 
Archaeodyptes waitahaorum gen. et sp. nov., Waimanutaha kenlovei gen. et sp. nov.

Mayr, Pietri, Proffitt, Blokland, Clarke, Love, Mannering, Crouch, Reid & Scofield, 2025  

DOI: doi.org/10.1093/zoolinnean/zlaf080 

Abstract 

We report new stem group sphenisciforms (ancestral penguins) from the Paleocene of the Waipara Greensand (Canterbury, New Zealand), and describe four new genera and species (Daniadyptes primaevus gen. et sp. nov., Waiparadyptes gracilitarsus gen. et sp. nov., Archaeodyptes waitahaorum gen. et sp. nov., Waimanutaha kenlovei gen. et sp. nov.) and a small species, which is tentatively assigned to the taxon Kupoupou. New material of Muriwaimanu tuatahi includes the first complete skull of this species. The fossils show previously unknown features of the earliest penguins, such as well-developed basipterygoid processes and a long hind toe, and for the first time gastroliths are preserved in a stem group sphenisciform. The very small D. primaevus as well as W. gracilitarsus and A. waitahaorum exhibit plesiomorphic features, which support a position outside a clade formed by M. tuatahi and more crownward taxa. The penguins from the Waipara Greensand show that during early penguin evolution selective forces mainly acted on the wing, pectoral girdle, and foot morphology, whereas the greatly elongated beak remained relatively unchanged for more than 20 Myr. Furthermore, the fossils support the New Zealand region as the centre of origin of sphenisciforms and document multiple radiations of stem group Sphenisciformes throughout the Cenozoic.

Daniadyptes primaevus gen. et sp. nov., 

Waiparadyptes gracilitarsus gen. et sp. nov., 

Archaeodyptes waitahaorum gen. et sp. nov., 

Waimanutaha kenlovei gen. et sp. nov.

Gerald Mayr, Vanesa L De Pietri, James Proffitt, Jacob C Blokland, Julia A Clarke, Leigh Love, Al A Mannering, Erica M Crouch, Catherine Reid and R Paul Scofield. 2025. Multiple exceptionally preserved Fossils from the Paleocene Waipara Greensand inform the Diversity of the Oldest stem group Sphenisciformes and the Formation of their Diving Adaptations. Zoological Journal of the Linnean Society. Volume 204, Issue 4, August 2025, zlaf080. DOI: doi.org/10.1093/zoolinnean/zlaf080 [12 August 2025]

[Ornithology • 2020] Morphometric and Genetic Evidence for Four Species of Gentoo Penguin; Pygoscelis papua, P. ellsworthi, P. taeniata & P. poncetii

 

South Georgia Gentoo Penguins Pygoscelis poncetii

Tyler, Bonfitto, Clucas, Reddy & Younger, 2020

DOI: 10.1002/ece3.6973  

 twitter.com/JoshTylerEarth 

 twitter.com/Jane_Younger 

  Photo by Gemma Clucas

Abstract

Gentoo penguins (Pygoscelis papua) are found across the Southern Ocean with a circumpolar distribution and notable genetic and morphological variation across their geographic range. Whether this geographic variation represents species‐level diversity has yet to be investigated in an integrative taxonomic framework. Here, we show that four distinct populations of gentoo penguins (Iles Kerguelen, Falkland Islands, South Georgia, and South Shetlands/Western Antarctic Peninsula) are genetically and morphologically distinct from one another. We present here a revised taxonomic treatment including formal nomenclatural changes. We suggest the designation of four species of gentoo penguin: Pygoscelis papua in the Falkland Islands, P. ellsworthi in the South Shetland Islands/Western Antarctic Peninsula, P. taeniata in Iles Kerguelen, and a new gentoo species P. poncetii, described herein, in South Georgia. These findings of cryptic diversity add to many other such findings across the avian tree of life in recent years. Our results further highlight the importance of reassessing species boundaries as methodological advances are made, particularly for taxa of conservation concern. We recommend reassessment by the IUCN of each species, particularly P. taeniata and P. poncetii, which both show evidence of decline.

Keywords: Antarctica, integrative taxonomy, new species, Pygoscelis, Southern Ocean

South Georgia Gentoo penguins (Pygoscelis poncetii) live in more northerly habitats where conditions are milder, than their Southern Gentoo cousins, which live on the Antarctic ice.

  Photo by Gemma Clucas

  Pygoscelis poncetii sp. nov.

Common Name. South Georgia gentoo penguin.

 

Etymology. Pygoscelis poncetii is named after Sally Poncet, whose body of work has significantly influenced the field of polar biology, particularly in relation to South Georgia.

Diagnosis. Morphologically, P. poncetii can be differentiated from all other species of gentoo by its manus length (mean length = 130.49 mm), being significantly smaller than P. papua (mean length = 135.08 mm, p = .0292) and significantly larger than both P. ellsworthi and P. taeniata (mean lengths = 115.38 mm and 125.27 mm, p < .0001 and p = .0232, respectively). Radius length differentiates P. poncetii (mean length = 52.68 mm) from the larger P. papua (mean length = 58.11 mm, p = .0003) and smaller P. ellsworthi (mean length = 48.90 mm, p = .0039). Genetic comparative techniques (Pairwise FST, heterozygosity, clustering methods) found significant differences among all four species of gentoo penguin with the maximum likelihood phylogeny resolving each species as 100% supported. There are no discernible differences in plumage patterns among the four species.

CONCLUDING REMARKS: 

In this paper, we highlight hidden biodiversity within the species P. papua using genetic and morphometric methods, in keeping with recent assessments of hidden species diversity in birds. Our results clearly support the division of gentoo penguins into at least four species. We name a new species of gentoo, P. poncetii, and recommend elevation of three subspecies to species level (P. taeniata, P. papua, and P. ellsworthi). Our results show the importance of reassessing species boundaries as methodological advances are made. These findings have implications for the threat status of these species, and we urge that this diversity is considered in conservation planning for the Southern Ocean.

Joshua Tyler, Matthew T. Bonfitto, Gemma V. Clucas, Sushma Reddy and Jane L. Younger. 2020. Morphometric and Genetic Evidence for Four Species of Gentoo Penguin. Ecology and Evolution. DOI: 10.1002/ece3.6973  

 twitter.com/JoshTylerEarth/status/1324358369096966144

 twitter.com/Jane_Younger/status/1324356444255379459

 theconversation.com/how-we-discovered-three-new-species-of-penguin-in-the-southern-ocean-149325

[PaleoOrnithology • 2012] Penguins: The Strangest Bird

A Panoply of Penguins

Art: Stephanie Abramowicz, Maps by XNR Productions

doi:10.1038/scientificamerican1112-56

- Penguins are weird birds in that they cannot fly and are instead proficient swimmers and divers.

- Evolutionary biologists have long wondered how penguins evolved their peculiar traits and how some of their kind conquered the bitterly cold Antarctic.

- Recent fossil discoveries have enabled researchers to piece together the penguins' evolutionary past, revealing that some of the traits that fortify them against the cold evolved under warm conditions.

- Although penguins have triumphed over 60 million years of climate change, current warming conditions may outpace their ability to adapt.

R. Ewan Fordyce & Daniel T. Ksepka. 2012. The Strangest Bird. Scientific American 307, 56 - 61 | DOI: 10.1038/scientificamerican1112-56