Quasillities Temporal range: Middle
Devonian to Lower
Carboniferous
| |
---|---|
Scientific classification | |
Kingdom: | |
Phylum: | |
Subphylum: | |
Class: | |
Order: | |
Family: | |
Genus: | Quasillites Coryell & Malkin, 1936
|
Species | |
|
Quasillites is a fossil genus of ostracod from the Devonian and Carboniferous Periods. [1] [2]
Quasillites is distinguished from other ostracodes by the presence of a "medial spot" on each valve. [2] The surface of each valve is covered in longitudinal, bifurcating ridges, which curve and resemble a finger print. [2] [3] The ribs and spines on the carapace are in front of the posterior margin, and are similar to those of other ostracods such as Bufina, Parabufina, and Healdia. [4] In fact, this comparison can also be drawn for all Quasillitids to other Healdiids. [4] The muscle scars on each valve is circular in shape, and some specimens have smaller secondary scars. [4]
Devonian examples of Quasillites, such as Q. lobatus, Q. obliquus, Q. subobliquus, and Q. angulatus, are known from shales and claystones in northern New York, Eastern Ohio, central Pennsylvania. [2] [3] [5] [6] Other species such as Q. fromelennensis and a second informal species can also be found in Limestones of northern France, near the city of Calais. [7] This genus has also been found in the Lower Carboniferous edge of the Illinois Basin; in central Indiana. [1]
Quasillities Temporal range: Middle
Devonian to Lower
Carboniferous
| |
---|---|
Scientific classification | |
Kingdom: | |
Phylum: | |
Subphylum: | |
Class: | |
Order: | |
Family: | |
Genus: | Quasillites Coryell & Malkin, 1936
|
Species | |
|
Quasillites is a fossil genus of ostracod from the Devonian and Carboniferous Periods. [1] [2]
Quasillites is distinguished from other ostracodes by the presence of a "medial spot" on each valve. [2] The surface of each valve is covered in longitudinal, bifurcating ridges, which curve and resemble a finger print. [2] [3] The ribs and spines on the carapace are in front of the posterior margin, and are similar to those of other ostracods such as Bufina, Parabufina, and Healdia. [4] In fact, this comparison can also be drawn for all Quasillitids to other Healdiids. [4] The muscle scars on each valve is circular in shape, and some specimens have smaller secondary scars. [4]
Devonian examples of Quasillites, such as Q. lobatus, Q. obliquus, Q. subobliquus, and Q. angulatus, are known from shales and claystones in northern New York, Eastern Ohio, central Pennsylvania. [2] [3] [5] [6] Other species such as Q. fromelennensis and a second informal species can also be found in Limestones of northern France, near the city of Calais. [7] This genus has also been found in the Lower Carboniferous edge of the Illinois Basin; in central Indiana. [1]