Angelina (trilobite)

Angelina is a genus of trilobite that lived during the Lower Ordovician (upper Tremadocian). It is known from Wales and South America. It differs from most other Triarthrinae in being larger, with a relatively narrow central raised area of the headshield (or glabella), with the occipital ring at the back of the glabella not well defined, and obscure lateral furrows. The eyes are placed midlength the headshield (or cephalon). The facial sutures converge on the front border at the midline. It also has very long and broad genal spines.[1]

Angelina
Temporal range: Early Ordovician 488–478 Ma
Angelina sedgwicki
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Olenina
Family:
Olenidae
Subfamily:
Triarthrinae
Genus:
Angelina

Salter, 1859
Species
  • A. sedgwickii Salter, 1859 (type)
  • A. hyeronimi
  • A. kayseri
  • A. punctolineata
  • A. spinosa
Synonyms

Keidelaspis

Species
  • Angelina hyeronimi
  • Angelina kayseri
  • Angelina punctolineata
  • Angelina sedgwickii (type)
  • Angelina spinosa

Distribution

Fossils of Angelina have been found in Argentina, Bolivia, Mexico,[2] and Wales.

gollark: Yes, it is distorted and gets noise added when you run it through the annoying analog world too.
gollark: What I am saying is that converting from an existing (lossy) MP3 to a WAV does not magically add back information.
gollark: I am not saying that a WAV file is indistinguishable from a MP3 file *if they are both from a lossless source*.
gollark: ↑
gollark: You're wrong and you still don't understand what lossy compression means.

References
  1. Moore, R.C. (1959). Arthropoda I - Arthropoda General Features, Proarthropoda, Euarthropoda General Features, Trilobitomorpha. Treatise on Invertebrate Paleontology. Part O. Boulder, Colorado/Lawrence, Kansas: Geological Society of America/University of Kansas Press. pp. 1–560. ISBN 0-8137-3015-5.
  2. Angelina at Fossilworks.org


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.