| Pachyacanthus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Infraorder: | Cetacea |
| Family: | Platanistidae |
| Genus: | †Pachyacanthus Brandt, 1871 |
| Species: | †P. suessi
|
| Binomial name | |
| †Pachyacanthus suessi Brandt, 1871
| |
Pachyacanthus is an extinct genus of toothed whale that lived about 15.97 to 2.589 million years ago (Miocene and Pliocene). It contains the single species Pachyacanthus suessi. The genus is known from European deposits in Hungary, Kazakhstan, Austria and Italy.[1][2] The type specimen consisted of a few fragments of a rostrum and two fragmentary tympanic bullae. Skeletons from the Sarmatian (Middle Miocene) of Austria did not include skulls.[3]
Morphology[edit]
The genus is related to modern South Asian river dolphin and is distinguished by pachyostosis in the spinous processes of the postcervical vertebrae.[4]
Paleoecology[edit]
The locations of discovery are thought to have corresponded to well-oxygenated, shallow water sustaining seagrasses similar to today's Mediterranean neptune grass.[5]
References[edit]
- ^ "†Pachyacanthus suessii Brandt 1871 (toothed whale)". The Paleotological database (PBDB).
- ^ Domning, Daryl P. (10 Jan 2009). "The readaptation of Eocene sirenians to life in water". Historical Biology. 14, 2000 (1–2): 115–119. doi:10.1080/10292380009380559. S2CID 86603486.
- ^ "Revision of the genus Pachyacanthus Brandt, 1871 (Mammalia: Cetacea: Odontoceti)". Docplayer.
- ^ Kazár, Emese (2010-07-12). "E. Kazár. 2010. Revision of the genus Pachyacanthus Brandt, 1871 (Mammalia: Cetacea: Odontoceti)". Annalen des Naturhistorischen Museums in Wien, Serie. 112: 537–567. JSTOR 41701767.
- ^ Garassino, A.; Pasini, G.; de Angeli, A.; Charbonnier, S.; Famiani, F.; Baldanza, A.; Bizzari, R. (2012). "The decapod community from the Early Pliocene (Zanclean) of "La Serra" quarry (San Miniato, Pisa, Toscana, central Italy): sedimentology, systematics, and palaeoenvironmental implications" (PDF). Annales de Paléontologie. 98 (1): 1–62. Bibcode:2012AnPal..98....1G. doi:10.1016/j.annpal.2012.02.001. ISSN 0753-3969.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction