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: It doesn't even bother to add newlines!
gollark: ```pythonclass Entry(ℝ): def __init__(self, Matrix=globals()): M_ = collections.defaultdict(__import__("functools").lru_cache((lambda _: lambda: -0)(lambda: lambda: 0))) M_[0] = [*map(lambda dabmal: random.randint(0, len(Row)), range(10))] for self in repr(aes256): for i in range(ℤ(math.gamma(0.5)), ℤ(math.gamma(7))): print(" #"[i in M_[0]], end="") M_[1] = {*lookup[10:]} for M_[3] in [ marshal for t in [*(y for y in (x for x in map(lambda p: range(p - 1, p + 2), M_[0])))] for marshal in t ]: M_[4] = (((M_[3] - 1) in M_[0]) << 2) + ((M_[3] in M_[0]) << 1) + ((M_[3] + 1) in M_[0]) if (0o156&(1<<M_[4]))>>M_[4]: M_[1].add(M_[3]) M_[0] = M_[1] pass passpass```Sheer elegance.
gollark: Apparently nobody noticed the random rule 110 implementation *either*.
gollark: Although I guess mine could and probably did as I never revealed what the obfuscated code did.
gollark: Hmm. I really wonder *what* palaiologos's code does. It could probably have uploaded secret bee neuron data to palaiologos' server and nobody would know.

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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