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Deltaherpeton

Deltaherpeton is an extinct genus of colosteid from middle Mississippian (late Viséan age) deposits of Delta, Iowa, United States.[1] It was first named by John R. Bolt and R. Eric Lombard in 2010 and the type species is Deltaherpeton hiemstrae.[1]

Deltaherpeton
Temporal range: 330 Ma
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Sarcopterygii
Clade: Tetrapodomorpha
Clade: Stegocephali
Family: Colosteidae
Genus: Deltaherpeton
Bolt & Lombard, 2010
Species
  • D. hiemstrae Bolt & Lombard, 2010 (type)

Deltaherpeton can be differentiated from other colosteids due to possessing several unique bones along the midline of the skull, separating paired skull bones which typically contact each other along the midline. These include an internasal, an oval-shaped bone which lies at the intersection of the paired premaxillae and nasal bones at the top of the snout. Internasals are known from several of the earliest four-limbed vertebrates, such as Acanthostega, Ichthyostega, and baphetids. Further back, what seems to be a pair of lozenge-shape bones lie at the intersection of the nasal bones and frontal bones. These bones may be interfrontonasals, which have been found in some eryopoids and microsaurs.[1]

In addition, Deltaherpeton has a single postparietal (rather than a pair), which separates the left and right supratemporal and tabular bones at the rear edge of the skull. Lone postparietals are rare among non-amniote tetrapods and tetrapod relatives; only Ichthyostega and diadectomorphs are known to possess them. The discovery of Deltaherpeton prompted a review and re-augmentation of the defining characteristics for the family Colosteidae, though it did not help to clarify the relationship between colosteids and other early tetrapods.[1]

Though it is believed that Deltaherpeton is more derived, the species is thought to have shared its environment with other early four-limbed vertebrates such as Whatcheeria and Siguornea, approximately 339.4 to 336 million years ago.[2]

References edit

  1. ^ a b c d John R. Bolt & R. Eric Lombard (2010). "Deltaherpeton hiemstrae, a New Colosteid Tetrapod from the Mississippian of Iowa". Journal of Paleontology. 84 (6): 1135–1151. Bibcode:2010JPal...84.1135B. doi:10.1666/10-020.1. S2CID 83774501.
  2. ^ https://www.dinosaurhome.com/creature-feature-8-whatcheeria-deltae-14925.html


deltaherpeton, this, article, uses, bare, urls, which, uninformative, vulnerable, link, please, consider, converting, them, full, citations, ensure, article, remains, verifiable, maintains, consistent, citation, style, several, templates, tools, available, ass. This article uses bare URLs which are uninformative and vulnerable to link rot Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style Several templates and tools are available to assist in formatting such as reFill documentation and Citation bot documentation August 2022 Learn how and when to remove this message Deltaherpeton is an extinct genus of colosteid from middle Mississippian late Visean age deposits of Delta Iowa United States 1 It was first named by John R Bolt and R Eric Lombard in 2010 and the type species is Deltaherpeton hiemstrae 1 DeltaherpetonTemporal range 330 Ma PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Clade Sarcopterygii Clade Tetrapodomorpha Clade Stegocephali Family Colosteidae Genus DeltaherpetonBolt amp Lombard 2010 Species D hiemstrae Bolt amp Lombard 2010 type Deltaherpeton can be differentiated from other colosteids due to possessing several unique bones along the midline of the skull separating paired skull bones which typically contact each other along the midline These include an internasal an oval shaped bone which lies at the intersection of the paired premaxillae and nasal bones at the top of the snout Internasals are known from several of the earliest four limbed vertebrates such as Acanthostega Ichthyostega and baphetids Further back what seems to be a pair of lozenge shape bones lie at the intersection of the nasal bones and frontal bones These bones may be interfrontonasals which have been found in some eryopoids and microsaurs 1 In addition Deltaherpeton has a single postparietal rather than a pair which separates the left and right supratemporal and tabular bones at the rear edge of the skull Lone postparietals are rare among non amniote tetrapods and tetrapod relatives only Ichthyostega and diadectomorphs are known to possess them The discovery of Deltaherpeton prompted a review and re augmentation of the defining characteristics for the family Colosteidae though it did not help to clarify the relationship between colosteids and other early tetrapods 1 Though it is believed that Deltaherpeton is more derived the species is thought to have shared its environment with other early four limbed vertebrates such as Whatcheeria and Siguornea approximately 339 4 to 336 million years ago 2 References edit a b c d John R Bolt amp R Eric Lombard 2010 Deltaherpeton hiemstrae a New Colosteid Tetrapod from the Mississippian of Iowa Journal of Paleontology 84 6 1135 1151 Bibcode 2010JPal 84 1135B doi 10 1666 10 020 1 S2CID 83774501 https www dinosaurhome com creature feature 8 whatcheeria deltae 14925 html nbsp This article about a tetrapodomorph is a stub You can help Wikipedia by expanding it vte nbsp This article related to a Carboniferous animal is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Deltaherpeton amp oldid 1219125159, wikipedia, wiki, book, books, library,

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