| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Itagnostus
Taxonomy
Itagnostus was named by Opik (1979) [Sepkoski's age data: Cm mMid-u]. It is not extant.
It was synonymized subjectively with Peronopsis by Robison (1988) and Jell and Adrain (2002).
It was assigned to Agnostida by Sepkoski (2002); and to Peronopsidae by Naimark and Pegel (2017) and Lerosey-Aubril et al. (2020).
It was synonymized subjectively with Peronopsis by Robison (1988) and Jell and Adrain (2002).
It was assigned to Agnostida by Sepkoski (2002); and to Peronopsidae by Naimark and Pegel (2017) and Lerosey-Aubril et al. (2020).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Itagnostus Opik |
| 2002 | Itagnostus Sepkoski |
| 2017 | Itagnostus Naimark and Pegel pp. 1191 - 1192 |
| 2020 | Itagnostus Lerosey-Aubril et al. p. 525 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Itagnostus Opik 1979
show all | hide all
†Itagnostus gaspensis Rasetti 1948
†Itagnostus interstrictus White 1874
†Itagnostus oepiki Laurie 2004
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. B. Naimark and T. V. Pegel 2017 | Cephalon with narrow border structures, glabella bipartite, F3 straight, F2 as short notches on sides, basal lobes small. Pygidial border moderately wide, tending to flatten, with tiny spines, border furrow moderately wide; postaxial furrow present, F1 and F2 as short notches, posteroaxial depression undeveloped, axis constricted across M2, M1 wider than M2, pygidial median node of moderate size. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: f = family, superf = superfamily | |||||
| References: Robison 1994, Hendy 2009 | |||||
Age range: base of the Templetonian to the top of the Dresbachian or 508.00000 to 485.40000 Ma
Collections (35 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Dyeran - Marjumian | USA (Utah) | Peronopsis interstricta (193607) | |
| Delamaran | USA (Utah) | Peronopsis interstricta (10566) | |
| Amgan | Russian Federation | I. gaspensis (225187) | |
| Solvan | Canada (Newfoundland and Labrador) | Peronopsis interstricta (10816 10824 10836 10837 10838 10840 10842 10852 10853) | |
| Middle Cambrian | USA (Utah) | Peronopsis interstricta (77275 86729 86730 86731 86732 86733 86734 86735 86736 86737 86738 156506) | |
| Middle Cambrian | USA (Alaska) | Peronopsis gaspensis (64765) | |
| Middle Cambrian | Canada (British Columbia) | I. interstrictus (171309) | |
| Middle Cambrian | Greenland | Peronopsis interstricta (10484) | |
| Templetonian | Australia (Northern Territories) | I. oepiki (225176) | |
| Tuesaian | Kazakhstan | Peronopsis gaspensis, Peronopsis interstricta (118054) | |
| Mayan | Russian Federation (Sakha) | I. gaspensis (225071) | |
| Marjumian | USA (Utah) | I. interstrictus (228653 230679) Peronopsis gaspensis, I. interstrictus (230682) Peronopsis interstricta (56144) | |
| Dresbachian | Canada (Newfoundland and Labrador) | Peronopsis interstricta (9703) |