Ammagnostidae is a family of
trilobites in the suborder
Agnostina, small, eyeless, isopygous trilobites with a thorax consisting of 2 segments only. Four
genera
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...
have been assigned to it:
;''Ammagnostus'' Öpik, 1967
*''
Ammagnostus psammius''
Öpik, 1967 (
Type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* Ty ...
)
*''
Ammagnostus bassus''
(Öpik, 1967)
*''
Ammagnostus bella''
Guo & Luo, 1996
*''
Ammagnostus beltensis''
(Lochman, 1944)
*''
Ammagnostus cryptus''
*''
Ammagnostus cylindratus''
Guo & Luo, 1996
*''
Ammagnostus duibianensis''
Lu & Lin, 1989
*''
Ammagnostus histus''
*''
Ammagnostus hunanensis''
*''
Ammagnostus integriceps''
Öpik, 1967
*''
Ammagnostus laiwuensis''
(Lorenz, 1906)
*''
Ammagnostus mitis''
Öpik, 1967
*''
Ammagnostus sinensis''
Peng, 1987
*''
Ammagnostus wangcunensis''
Peng & Robison
;''Hadragnostus'' Öpik, 1967
*''
Hadragnostus las''
Öpik, 1967 (
Type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* Ty ...
)
*''
Hadragnostus edax''
Fortey & Rushton, 1976
*''
Hadragnostus helixensis''
Jago & Cooper, 2005
*''
Hadragnostus modestus''
(Lochman, 1944)
;''Kormagnostus'' Resser, 1938
*''
Kormagnostus simplex''
Resser, 1938 (
Type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* Ty ...
)
*''
Kormagnostus boltoni''
Westrop ''et al.'', 1996
*''
Kormagnostus copelandi''
Westrop ''et al.'', 1996
*''
Kormagnostus flati''
Pratt, 1992
*''
Kormagnostus inventus''
Shergold, 1982
*''
Kormagnostus minutus''
(Schrank, 1975)
*''
Kormagnostus seclusus''
( Walcott, 1884)
;''Proagnostus'' Butts, 1926
*''
Proagnostus bulbus''
Butts, 1926 (
Type
Type may refer to:
Science and technology Computing
* Typing, producing text via a keyboard, typewriter, etc.
* Data type, collection of values used for computations.
* File type
* TYPE (DOS command), a command to display contents of a file.
* Ty ...
)
*''
Proagnostus centerensis''
Resser, 1938
*''
Proagnostus maryvillensis''
Resser
They lived during the late
Cambrian period
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
to the
Ordovician period.
References
* https://www.biolib.cz/en/taxon/id456979/
* http://www.trilobites.info/ordagnostida.htm
Trilobite families
Agnostoidea
Cambrian trilobites
Ordovician trilobites
Cambrian first appearances
Ordovician extinctions
{{Agnostida-stub