| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Trachycheilus
Taxonomy
Trachycheilus was named by Resser (1945) [Sepkoski's age data: Cm mMid-u Sepkoski's reference number: 1089]. It is not extant.
It was assigned to Ehmaniellinae by Sundberg (1994); to Ptychopariida by Sepkoski (2002); and to Alokistocaridae by Jell and Adrain (2002).
It was assigned to Ehmaniellinae by Sundberg (1994); to Ptychopariida by Sepkoski (2002); and to Alokistocaridae by Jell and Adrain (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1945 | Trachycheilus Resser |
| 1994 | Trachycheilus Sundberg p. 80 |
| 2002 | Trachycheilus Jell and Adrain p. 454 |
| 2002 | Trachycheilus Sepkoski |
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. †Trachycheilus Resser 1945
show all | hide all
†Trachycheilus granulosus Sundberg 1994
†Trachycheilus whirlwindensis Sundberg 1994
hide
†Trachycheilus whirlwindensis drumensis Sundberg 1994
†Trachycheilus whirlwindensis whirlwindensis Sundberg 1994
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. A. Sundberg 1994 | Ehmaniellinae with subpentagonal to trapezoidal cranidium with con- vergent facial sutures anterior of palpebral lobes; short to moderate palpebral lobes (20-35% gla- bellar length); well-defined anterior border, narrow to moderate width (5-20% cranidial length), modrate to strongly tapered; preglabellar field sagittally narrow to moderately wide (15-45% frontal area length); strongly to very strongly tapered glabella; moderately to bluntly rounded frontal lobe; exsag- ittally wide posterior area of fixigenae (35-55% gla- bellar length). Pygidium subcircular to subelliptical with elongate axis; 5 axial rings; moderate depth pleural furrows; moderate to strong posterior pleural bands; weak to absent anterior pleural bands. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Templetonian to the top of the Menevian or 508.00000 to 499.50000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Delamaran | USA (Nevada) | T. whirlwindensis (134244 134254) | |
| Delamaran | USA (Utah) | T. granulosus (133725) T. whirlwindensis (133727 133728) | |
| Templetonian | USA (Nevada) | T. granulosus (225254 225255) | |
| Menevian | USA (Utah) | T. sp. (10532) |