-
Orthotheca is a
genus of
sessile bottom-dwelling hyolith. Malinky, J. M. (2009). "First
Occurrence of
Orthotheca Novák, 1886 (Hyolitha,
Early Devonian)...
- Polonica. 49 (4): 551–578. Malinky, J. M. (2009). "First
Occurrence of
Orthotheca Novák, 1886 (Hyolitha,
Early Devonian) in
North America".
Journal of Paleontology...
- specimen. C.
major was
originally described as a
member of the
hyolith genus Orthotheca. C.
fragilis was
originally included by
Charles D.
Walcott in the genus...
- that had been
found earlier in the
Ogyopsis Shale, and
classified as "
Orthotheca corrugata".
Further specimens were
found by
American paleontologist Charles...
- †Neospirifer †Niobe –
tentative report †Obolus †Ogygopsis †Olenoides †
Orthotheca †Oryctocephalus †Pagetia
Palaeoaplysina †Paterina †Pelagiella †Peronopsis...
- 1990 † Clio
oblonga Rampal, 1996 † Clio
ortheziana (Benoist, 1889) Clio
orthotheca (Tesch, 1904) † Clio
pauli A. W. Janssen, 1989 † Clio
pedemontana (C....
-
Notabilitus Novakotheca Novitatus Obliquatheca Oblisicornus Oboedalites Orthotheca Ovalitheca Oxytus Panitheca Parahyolithes Parakorilithes Parkula Patholites...
- †Olenellus †Olenoides †Olenoides
serratus †Orthacanthus †Orthoceras †
Orthotheca †Oryctocephalus †Osteolepis †Oulodus †Ozarkodina †Paedeumias †Pagetia...
-
lamellosum †Orthis †Orthoceras †Orthoceras
modestum †Orthoceras
vagum †
Orthotheca †
Orthotheca acicula †Pachydictya †Pachydictya
sheldonensis †Pachystylostroma...
- †Orthonota
undulata †Orthonychia †Orthonychia
parva †Orthotetes †
Orthotheca †
Orthotheca shriveri – type
locality for
species †Oryctocephalus †Osteolepis...
