Fenestraspis

Fenestraspis is an extinct genus of trilobite in the order Phacopida from the Upper Pragian and Lower Emsian.[1] Fenestraspis is unusual because of the development of extensive fenestrae in the posterior part of the body and apparently of the thorax, the presence of upwardly directed spines on the cephalon, thorax and pygidium, and the exceptionally large and highly elevated eyes.[1]

Fenestraspis
Temporal range: Pragian–Emsian
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Phacopida
Family:
Dalmanitidae
Genus:
Fenestraspis

Braniša & Vanek, 1973

Distribution

F. amauta is only known from the Lower and Middle Devonian of Bolivia (upper quarter of the Lower Belen Formation, which approximately coincides with the transition from the Pragian to the Emsian, near Chacoma-Cahuanota and Patacamaya).[1]

gollark: Or possibly binary. Something like that.
gollark: Those are different, I think it just means "Unary operator" in APL.
gollark: `IO` is just `State` but it stores the entire real world.
gollark: `Maybe` is a way to represent computations which might fail. Other languages call it `Option`.
gollark: The list monad is BAD.

References
  1. David J. Holloway & Maria da Gloria Pires de Carvalho (2009). "The extraordinary trilobite Fenestraspis (Dalmanitidae, Synphoriinae) from the Lower Devonian of Bolivia". Palaeontology. 52 (4): 933–949. doi:10.1111/j.1475-4983.2009.00878.x.


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