Obaichthyidae
| Obaichthyidae | ||||||||||||
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Obaichthys decoratus , fossil in the American Museum of Natural History in New York |
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| Temporal occurrence | ||||||||||||
| Albium up? ( Cretaceous Period ) | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Obaichthyidae | ||||||||||||
| Grande , 2010 |
The Obaichthyidae are an extinct group of predatory fish that is related to the recent pike (Lepisosteidae). It occurred in South America and Africa in the Cretaceous Period . The family was only in 2010 by the American biologists and paleontologists Lance Grande described after in studies of fossil finds from the northeastern Brazilian Santana Formation in which acid preparation, even the smallest morphological has had to recognize details, found that the basal gar-like more differ from today's pike than previously thought. With the establishment of the family, the fish-like (Lepisosteiformes) are no longer monotypical .
features
The Obaichthyidae differ from the bone pike mainly in a more primitive arrangement of the bones of the dermatocranium . In contrast to these, they have a well-developed interoperculare (lower gill cover bone) and an additional bone between the paired exoccipital bones (occiput bones).
Genera and species
There are two genera, each with two types:
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Obaichthys Wenz & Brito, 1992
- Obaichthys decoratus Wenz & Brito, 1992 (Santana formation)
- Obaichthys africanus Grande, 2010
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Dentilepisosteus Grande, 2010
- Dentilepisosteus laevis (Wenz & Brito, 1992) (Santana formation)
- Dentilepisosteus kemkenensis Grande, 2010
literature
- Lance Grande: An empirical synthetic pattern study of gars (Lepisosteiformes) and closely related species, based mostly on skeletal anatomy: the resurrection of Holostei. Publisher, Year: Lawrence, Kansas, Allen Press, 2010