Notochen

Last updated

Notochen
Temporal range: early Miocene,
19–16  Ma
O
S
D
C
P
T
J
K
Pg
N
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Anseriformes
Family: Anatidae
Genus: Notochen
Worthy et al., 2022
Species:
N. bannockburnensis
Binomial name
Notochen bannockburnensis
Worthy et al., 2022

Notochen (meaning "southern goose"), also called the Bannockburn swan, is an extinct genus of anatid bird from the Early Miocene Bannockburn Formation of Otago, New Zealand. The genus contains a single species, Notochen bannockburnensis, known from various fossil material. [1]

Contents

Discovery and naming

The Notochen holotype specimen, CM 2017.37.919, was discovered in the Bannockburn Formation (Manuherikia Group) near St Bathans, Otago, New Zealand. This specimen consists of the distal right humerus. Additional specimens, consisting of fragmentary coracoids and a proximal part of the right shaft of a humerus, were also referred to Notochen. [1]

In 2022, Worthy et al. described Notochen bannockburnensis, a new genus and species of antatid, based on these fossil remains. The generic name, "Notochen", combines the Greek words "notios", meaning southern, and "chen," meaning "goose". The specific name, "bannockburnensis", refers to the geologic formation from which the fossils were recovered. Notochen represents the eighth anatid named from the St Bathans Fauna. [1]

Description

The describing authors concluded that Notochen would have had a body size comparable to extant swans. Along with the coeval Miotadorna , Notochen would have likely been a terrestrial grazer, while other anatids from the locality were mainly aquatic herbivores with diving and swimming adaptations. [1]

Classification

While the describing authors could not confidently refer Notochen to either Cygnini (swans) or Anserini (geese), they note that the proportions and large size of the fossil material suggest a more likely affinity to Cygnini. [1]

Related Research Articles

<span class="mw-page-title-main">Anatidae</span> Biological family of water birds

The Anatidae are the biological family of water birds that includes ducks, geese, and swans. The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica. These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water. The family contains around 174 species in 43 genera.

<span class="mw-page-title-main">Owlet-nightjar</span> Genus of birds

Owlet-nightjars are small crepuscular birds related to the nightjars and frogmouths. Most are native to New Guinea, but some species extend to Australia, the Moluccas, and New Caledonia. A flightless species from New Zealand is extinct. There is a single monotypic family Aegothelidae with the genus Aegotheles.

<span class="mw-page-title-main">Saint Bathans</span> Town in Otago, New Zealand

St Bathans, formerly named Dunstan Creek, is a former gold and coal mining town in Central Otago, New Zealand. The settlement was a centre of the Otago Gold Rush, but mining has since long ceased. It is now largely a holiday retreat due to the preservation of many of its historic buildings.

<i>Palaelodus</i> Extinct genus of birds

Palaelodus is an extinct genus of bird of the Palaelodidae family, distantly related to flamingos. They were slender birds with long, thin legs and a long neck resembling their modern relatives, but likely lived very different livestyles. They had straight, conical beaks not suited for filter feeding and legs showing some similarities to grebes. Their precise lifestyle is disputed, with researchers in the past suggesting they may have been divers, while more recent research suggests they may have used their stiff toes as paddles for swimming while feeding on insect larvae and snails. This behavior may have been key in later phoenicopteriforms developing filterfeeding bills. The genus includes between five and eight species and is found across Europe, Australia, New Zealand, Asia and possibly South America. However some argue that most of the taxa named from Europe simply represent differently sized individuals of one single species. Palaelodus was most abundant during the Late Oligocene to Middle Miocene periods, but isolated remains from Australia indicate that the genus, or at least a relative, survived until the Pleistocene.

The Saint Bathans mammal is a currently unnamed extinct primitive mammal from the Early Miocene of New Zealand. A member of the Saint Bathans fauna, it is notable for being a late-surviving "archaic" mammal species, neither a placental nor a marsupial. It also provides evidence that flightless fully terrestrial mammals did in fact once live in Zealandia. This is in contrast to modern New Zealand, where bats, cetaceans and seals are the only non-introduced mammals in the otherwise bird-dominated faunas.

<i>Nelepsittacus</i> Extinct genus of birds

Nelepsittacus is a genus of extinct New Zealand parrots that is closely related to the genus Nestor. It consists of four species, of which three have been named so far. The species are all known from the early Miocene Saint Bathans Fauna from the Lower Bannockburn Formation in Otago in New Zealand.

Matuku otagoense, also referred to as the Saint Bathans heron, is an extinct genus and species of heron from the Early Miocene of New Zealand. It was described from fossil material collected in 2007 from the Saint Bathans Fauna of the Bannockburn Formation in Otago, South Island. It was a contemporary of the much smaller Saint Bathans bittern, remains of which have been found in the same sediments. The genus name matuku is a Māori-language word meaning “heron” or "bittern". The specific epithet is a latinisation of the name of the Otago region where the descriptive material was collected.

Rupephaps taketake, also referred to as the Saint Bathans pigeon, is an extinct species of pigeon from the Miocene of New Zealand. It is the first species of columbid to be described from pre-Pliocene fossil deposits in the Australasian region.

<span class="mw-page-title-main">St Bathans fauna</span> Fossil deposit from the Early Miocene period in Central Otago, New Zealand

The St Bathans fauna is found in the lower Bannockburn Formation of the Manuherikia Group of Central Otago, in the South Island of New Zealand. It comprises a suite of fossilised prehistoric animals from the late Early Miocene (Altonian) period, with an age range of 19–16 million years ago.

Manuherikia is a genus of extinct species of ducks from the Miocene of New Zealand. It was described from fossil material of the Saint Bathans Fauna, in the lower Bannockburn Formation of the Manuherikia Group, found by the Manuherikia River in the Central Otago region of the South Island. The genus name comes from the name of the geological formation in which the fossils were found and, ultimately, from the Manuherikia River and its valley.

Miotadorna is a genus of extinct tadornine ducks from the Miocene of New Zealand. It contains two species, M. sanctibathansi, and M. catrionae.

Dunstanetta johnstoneorum is a genus and species of extinct duck from the Miocene of New Zealand. It was described from fossil material collected from a Saint Bathans Fauna site on Home Hills Station, in the lower Bannockburn Formation of the Manuherikia Group, in the Manuherikia River valley in the Central Otago region of the South Island. The genus name refers to the Dunstan Range, the mountains of which overlook the fossil site. The specific epithet honours Ann and Euan Johnstone of Home Hills Station.

Matanas enrighti is an extinct duck from the Miocene of New Zealand. It was described from fossil material collected from a Saint Bathans Fauna site near Mata Creek, in the lower Bannockburn Formation of the Manuherikia Group, in the Manuherikia River valley in the Central Otago region of the South Island.

<i>Pikaihao</i> Extinct genus of birds

Pikaihao bartlei, also referred to as Bartle's bittern or the Saint Bathans bittern, is a genus and species of prehistoric small bittern from the Early Miocene of New Zealand. It was described in 2013 from fossil material found in the Saint Bathans Fauna of the Bannockburn Formation, at Home Hills Station in the Manuherikia River valley of Otago, South Island. It was a contemporary of the much larger Saint Bathans heron, remains of which have been found in the same sediments. The genus name Pikaihao comes from the Māori pi and kaihao (“fisherman”). The specific epithet honours Sandy Bartle, Curator of Birds at the Museum of New Zealand Te Papa Tongarewa from 1976 to 2009.

<span class="mw-page-title-main">Manuherikia Group</span>

The Manuherikia Group is a fluvial-lacustrine sedimentary fill in the Central Otago area of New Zealand, at the site of the prehistoric Lake Manuherikia. The area consists of a valley and ridge topography, with a series of schist-greywacke mountains at roughly ninety degrees to each other. The Manuherika Group occurs in the current basins, and occasionally on the mountains themselves.

<i>Garganornis</i> Extinct genus of birds

Garganornis is an extinct genus of enormous flightless anatid waterfowl from the Late Miocene of Gargano, Italy. The genus contains one species, G. ballmanni, named by Meijer in 2014. Its enormous size is thought to have been an adaptation to living in exposed, open areas with no terrestrial predators, and as a deterrent to the indigenous aerial predators like the eagle Garganoaetus and the giant barn owl Tyto gigantea.

Lake Manuherikia was a prehistoric lake which once stretched over some 5,600 square kilometres (2,200 sq mi) in what is now inland Otago in New Zealand's South Island. It stretched from Bannockburn and the Nevis valley in the west to Naseby in the east, and from the Waitaki valley in the north to Ranfurly in the south, including much of the area now referred to as the Maniototo. The lake existed from around 19 to 16 million years ago during the Miocene epoch, at which point New Zealand was significantly warmer than the present.

<i>Heracles inexpectatus</i> Extinct species of bird

Heracles inexpectatus is a giant fossil parrot species from New Zealand, assigned to a monotypic genus Heracles, that lived during the early Miocene approximately 16 to 19 million years ago. The species was described from two tibiotarsus fossils discovered in 2008 at Saint Bathans, Otago, New Zealand. It is believed that the species stood up to 90 cm tall and weighed approximately 7 kg (15 lb). Initial analysis suggests that this parrot is from the order Psittaciformes and from the superfamily Strigopoidea, which consists of three confirmed primitive genera of parrots: Nestor, Strigops (Kākāpō) and the fossil Nelepsittacus. It may have been the ancestor of the kākāpō.

<i>Zealandornis</i> Extinct genus of birds

Zealandornis is an extinct genus of zealandornithid bird from the early Miocene Bannockburn Formation of Otago, New Zealand. The genus contains a single species, Zealandornis relictus, known from a distal right humerus.

Annakacygna is a genus of flightless marine swan from the Miocene of Japan. Named in 2022, Annakacygna displays a series of unique adaptations setting it apart from any other known swan, including a filter feeding lifestyle, a highly mobile tail and wings that likely formed a cradle for their hatchlings in a fashion similar to modern mute swans. Additionally, it may have used both wings and tail as a form of display. All of these traits combined have led the researchers working on it to dub it "the ultimate bird". Two species are known, A. hajimei, which was approximately the size of a black swan, and A. yoshiiensis which exceeded the mute swan in both size and weight. The describing authors proposed the vernacular name Annaka short-winged swan for the genus.

References

  1. 1 2 3 4 5 Worthy, Trevor H.; Scofield, R. Paul; Hand, Suzanne J.; De Pietri, Vanesa L.; Archer, Michael (2022-07-20). "A swan-sized fossil anatid (Aves: Anatidae) from the early Miocene St Bathans Fauna of New Zealand". Zootaxa . 5168 (1): 39–50. doi: 10.11646/zootaxa.5168.1.3 . ISSN   1175-5334. PMID   36101302. S2CID   250940807.