Cordaticaris

Add links
Source: Wikipedia, the free encyclopedia.

Cordaticaris
Temporal range: Miaolingian
↓
Diagram of the head sclerites of C. striatus
Life restoration of C. striatus (the trunk region is speculative, being based on a close relative, Cambroraster).
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: †Dinocaridida
Order: †Radiodonta
Family: †Hurdiidae
Genus: †Cordaticaris
Sun, 2020
Type species
Cordaticaris striatus
Sun, 2020

Cordaticaris

endites and seven more elongated subequal endites.[1] This animal was important as it was the first Miaolingian aged hurdiid known from rock layers outside of laurentia, allowing paleontologists to get a better grasp of this families geographic range in life.[1]

Hurdiids like Cordaticaris were the most diverse lineage of radiodonts, both in terms of geographic distribution, and ecological roles. They are differentiated from other radiodont groups by their large head sclerites, their tetraradial mouth-parts, and their appendages bearing around five subequal endites.[2] The diversity of hurdiid head sclerites is notable, with some genera like Aegirocassis and Hurdia possessing long, pointed sclerites.[3][4] While others like Cambroraster and Titanokorys possessed horseshoe-shaped sclerites.[5][6]

Description

podomeres, which each bore long overlapping endites. These endites then bore around 20 or so long auxiliary spines, which were shaped like needles.[1]

Classification

The features present in Cordaticaris (cephalic carapace, elongated endites, and the oral cone shape) align it with the hurdiids.[1] In 2022 when describing new remains of the basal hurdiid Stanleycaris, Moysiuk and Caron assigned Cordaticaris to a derived position within the hurdiid family alongside Cambroraster and Titanokorys.[7]

Phylogentic position of Cordaticaris in relation to other radiodonts
Radiodonta
Phylogenetic position of Cordaticaris after Moysiuk & Caron 2022.[8]

Paleoecology

Life restoration of the Linyi Lagerstätte, with Cordaticaris in the upper left corner.

Cordaticaris fossils are known from a site called the Linyi Lagerstätte, which sits above the Panchegou Member within the larger Zhangxia Formation. The site is known for its soft bodied preservation, with some of the arthropod taxa known showing preserved digestive systems. According to the 2022 paper that analyzed the site, there are "35 fossil taxa, including four

macroalgae and four trace fossils".[9] There are at least two genera of radiodonts known, Cordaticaris (which is the most abundant non-trilobite arthropod at the site), and a currently unnamed amplectobeluid known from several frontal appendages.[9]

Notes

  1. ^ From Latin cordatus for "heart-shaped", and "caris" for "shrimp"

References

  1. ^
    S2CID 224868404
    .
  2. ^ Pates S, Lerosey-Aubril R, Daley AC, Kier C, Bonino E, Ortega-Hernández J. 2021. The diverse radiodont fauna from the Marjum Formation of Utah, USA (Cambrian: Drumian) PeerJ 9:e10509 https://doi.org/10.7717/peerj.10509
  3. ^ Van Roy, Peter (12 March 2015). "Fossils of huge plankton-eating sea creature shine light on early arthropod evolution". The Conversation. Retrieved 16 March 2015.
  4. S2CID 86465719
    .
  5. PMID 31362637
    .
  6. PMID 34527273
    .
  7. S2CID 250361698
    .
  8. S2CID 250361698
    .
  9. ^
    PMID 35832778
    . Retrieved 2 April 2023.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Cordaticaris&oldid=1193917455"