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Tasbacka

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Extinct genus of turtles

Tasbacka Temporal range:Campanian-Eocene,Campanian–48.6^[1]^[2] PreꞒ Ꞓ O S D C P T J K Pg N

T. danica fossil from theFur Formation
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	Cheloniidae
Tribe:	Cheloniini
Genus:	Tasbacka Nessov, 1987
Type species
Tasbacka aldabergeni Nessov, 1987
Other species
Tasbacka danicaKarl & Madsen, 2012 Tasbacka germanicaKarl, Gröning & Brauckmann, 2019 Tasbacka ouledabdounensisTong & Hirayama, 2002 Tasbacka ruhoffiWeems, 1988 Tasbacka salisburgensisKarl, 1996

Tasbacka is anextinct genus ofsea turtle containing several species.^[1]^[3]

Though thetype species,T. aldabergeni, has only been found in Kazakhstan^[4] and inRostov Oblast,Russia,^[5]Tasbacka had a wide distribution.T. ruhoffi was found in the eastern USA,^[6]T. danica in modern Denmark,T. ouledabdounensis in modern Morocco,T. salisburgensis in modern Austria,^[3] andT. germanica in modern Germany.^[2]

In 2008, researchers found a well-preserved, juvenile specimen ofT. danica in Denmark'sFur Formation.^[7] Some of the fossil's soft tissues remained.^[8] The specimen, dating back to 54Ma, contained eumelanin. This pigment would've given the hatchling a dark shell while it was alive. Modern sea turtle hatchlings also have dark shells; while a hatchling floats on the ocean's surface, its dark coloring enables it to absorb heat from the sun and avoid predatory birds. The existence of similar pigment on an ancient specimen suggests sea turtles evolved this survival trait millions of years ago.^[7]

References

[edit]

^^a ^b"†Tasbacka Nesov 1986 (sea turtle)".Paleobiology Database. Fossilworks. Retrieved25 January 2022.
^^a ^bKarl, H.-V.; Gröning, E.; Brauckmann, C. (2019). "Tasbacka germanica n. sp., a new Campanian marine turtle from NW-Germany (Testudines: Chelonioidea)".Mainzer Naturwissenschaftliches Archiv.56:99–112.
^^a ^bKarl, H.-V.; Madsen, H. (2012)."Tasbacka danica n. sp., a new Eocene marine turtle of Denmark (Testudines: Chelonioidea)"(PDF).Studia Palaeocheloniologica.4:193–204.
^"†Tasbacka aldabergeni Nessov 1987 (sea turtle)".Paleobiology Database. Fossilworks.
^Zvonok, E. A.; Benitskiy, K. S.; Danilov, I. G. (1 March 2023)."A Sea Turtle Tasbacka aldabergeni Nessov, 1987 from the Lower Paleogene Deposits of the Kudinovka Locality (Rostov Province, Russia)".Палеонтологический журнал (2):100–114.doi:10.31857/S0031031X23020149.ISSN 0031-031X. Retrieved19 September 2024.
^"†Tasbacka ruhoffi Weems 1988 (sea turtle)".Paleobiology Database. Fossilworks.
^^a ^bPeake, Tracey (October 17, 2017)."Keratin, Pigment, Proteins From 54 Million-Year-Old Sea Turtle Show Survival Trait Evolution".NC State University News. North Carolina State University.
^"Danekræ fossil trove collection".Statens Naturhistoriske Museum Samlinger (in Danish).A complete juvenile sea-turtle referred to the new speciesTasbacka danica, with soft tissue preservation and outstanding exhibition value.

Cheloniidae family

Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Subclass:Anapsida
Order:Testudines
Suborder:Cryptodira
Superfamily:Sea turtles
Family:Cheloniidae

Genera

Species of theCheloniidae family

†Allopleuron

†Allopleuron hofmanni

†Argillochelys

†Argillochelys africana

Caretta

Loggerhead sea turtle

†Carolinochelys

†Carolinochelys wilsoni

Chelonia

Green sea turtle

†Eochelone

†Eochelone brabantica
†Eochelone voltregana

Eretmochelys

Hawksbill sea turtle

†Gigantatypus

†Gigantatypus salahi

†Glarichelys

†Glarichelys knorri

†Itilochelys

†Itilochelys rasstrigin

Lepidochelys

†Mexichelys

†Mexichelys coahuilaensis

†Miocaretta

†Miocaretta lankae

Natator

Flatback sea turtle

†Pacifichelys

†Pacifichelys hutchisoni
†Pacifichelys urbinai

†Syllomus

†Syllomus aegyptiacus
†Syllomus crispatus

†Tasbacka

Phylogenetic arrangement of turtles based onturtles of the world 2017 update: Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status. †=Extinct.

Testudines

Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Clade:Diapsida
Order:Testudines

Genus

Chelonioidea
(Sea turtles)

Cheloniidae	†Allopleuron Caretta †Carolinochelys Chelonia †Eochelone Eretmochelys †Gigantatypus †Glarichelys †Itilochelys Lepidochelys †Mexichelys †Miocaretta Natator †Pacifichelys †Syllomus †Tasbacka
Dermochelyidae	†Arabemys †Corsochelys †Cosmochelys Dermochelys †Eosphargis †Mesodermochelys †Psephophorus
	†Euclastes †Peritresius †Procolpochelys †Protosphargis †Puppigerus

Kinosternoidea

Dermatemydidae	Dermatemys
Kinosternidae	Claudius †Hoplochelys Kinosternon Staurotypus Sternotherus

Testudinoidea

Emydidae	†Acherontemys Chrysemys Clemmys Deirochelys Emys Actinemys Emydoidea Glyptemys Graptemys Malaclemys Pseudemys Terrapene Trachemys †Wilburemys
Geoemydidae	Batagur †Banhxeochelys Cuora Cyclemys Geoclemys Geoemyda Hardella Heosemys Leucocephalon Malayemys Mauremys Melanochelys Morenia Notochelys Orlitia Pangshura Rhinoclemmys Sacalia Siebenrockiella Vijayachelys
Platysternidae	Platysternon
Testudinidae	Aldabrachelys Astrochelys Centrochelys Chelonoidis Chersina Cylindraspis †Cymatholcus †Floridemys Geochelone Gopherus †Hadrianus †Hesperotestudo Homopus Indotestudo Kinixys Malacochersus Manouria †Megalochelys †Oligopherus Psammobates Pyxis †Solitudo Stigmochelys †Stylemys Testudo

Trionychia

Carettochelyidae	†Allaeochelys †Anosteira Carettochelys
Trionychidae	Amyda Apalone †Axestemys Chitra Cyclanorbis Cycloderma †Drazinderetes Dogania †Gilmoremys †Hutchemys †Khunnuchelys Lissemys Nilssonia Palea †Palaeoamyda Pelochelys Pelodiscus Rafetus Trionyx
	†Basilochelys †Sinaspideretes

Chelydridae	Chelydra †Chelydrops †Chelydropsis †Emarginachelys †Macrocephalochelys Macrochelys †Planiplastron †Protochelydra
†Nanhsiungchelyidae	†Anomalochelys †Basilemys †Jiangxichelys
†Protostegidae	†Alienochelys †Archelon †Atlantochelys †Bouliachelys †Calcarichelys †Cratochelone †Desmatochelys †Iserosaurus †Notochelone †Ocepechelon †Pneumatoarthrus †Protostega †Rhinochelys †Santanachelys †Terlinguachelys
	†Adocus †Argillochelys †Bashuchelys †Ctenochelys †Prionochelys †Toxochelys

Pleurodira

†Araripemydidae	†Araripemys
†Bothremydidae	†Araiochelys †Arenila †Azabbaremys †Bothremys †Cearachelys †Chedighaii †Chupacabrachelys †Eotaphrosphys †Foxemys †Galianemys †Ilatardia †Inaechelys †Itapecuruemys †Jainemys †Kinkonychelys †Kurmademys †Labrostochelys †Nigeremys †Phosphatochelys †Polysternon †Puentemys †Rosasia †Rhothonemys †Sankuchemys †Taphrosphys †Ummulisani †Zolhafah
Chelidae	Acanthochelys Chelodina Chelus Elseya Elusor Emydura Hydromedusa †Lomalatachelys Mesoclemmys Myuchelys Phrynops Platemys †Prochelidella Pseudemydura Rheodytes Rhinemys †Yaminuechelys
Pelomedusidae	Pelomedusa Pelusios
Podocnemididae	†Albertwoodemys †Bauruemys †Brontochelys †Caninemys †Carbonemys †Cerrejonemys †Cordichelys Erymnochelys †Lapparentemys †Latentemys Peltocephalus Podocnemis †Stupendemys
†Sahonachelyidae	†Sahonachelys †Sokatra

	†Caribemys †Caririemys †Tacuarembemys

Phylogenetic arrangement of turtles based onTurtles of the World 2017 Update: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status. † = extinct.

See alsoList of Testudines families

Taxon identifiers
Tasbacka	Wikidata:Q20721719 GBIF:4818821 IRMNG:1010057 Open Tree of Life:3606459 Paleobiology Database:36374

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