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Taxonomy
Lachnostoma was named by Ross (1951) [Sepkoski's age data: O Aren-l Sepkoski's reference number: 795]. Its type is Lachnostoma latucelsum.
It was assigned to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002) and Fortey and Bruton (2013).
It was assigned to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002) and Fortey and Bruton (2013).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Lachnostoma Ross p. 94 |
| 2002 | Lachnostoma Jell and Adrain p. 395 |
| 2002 | Lachnostoma Sepkoski |
| 2013 | Lachnostoma Fortey and Bruton |
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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. †Lachnostoma Ross 1951
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†Lachnostoma disputa Fortey 1975
†Lachnostoma latucelsum Ross 1951
†Lachnostoma platypyga Fortey and Bruton 2013
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: Arenigian or 478.60000 to 468.10000 Ma
Collections (61 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ibexian | Norway (Spitsbergen) | Paraptychopyge disputa (106470 106471) | |
| Tremadoc | Canada (Alberta) | L. latucelsum (10904 10908 10909 10910 10911 10916 10917 10919 10920 10921 10922 10923 10924 10925 10926 10927 10928 10930 10932 10935 10936 10937 10938) | |
| Early/Lower Ordovician | USA (Utah) | L. latucelsum (77844 77845) | |
| Cassinian | USA (Utah) | L. sp. (104062) | |
| Arenigian | USA (Utah) | L. sp. (64555 64558) | |
| Arenig | USA (Nevada) | L. sp. (60037 60038 64601) | |
| Blackhillsian - Rangerian | USA (Nevada) | L. latucelsum (104356) | |
| Blackhillsian | USA (Utah) | L. latucelsum (63839 63840 63842 63843 63848 63926 63927 63928 63929 103831 103917 104262 104264 104265 104266) L. sp. (295) L. sp., L. latucelsum (63846) | |
| Blackhillsian | USA (California) | L. disputa (40732) L. sp. (104349) | |
| Blackhillsian | Norway (Spitsbergen) | L. platypyga (189839) | |
| Blackhillsian | USA (Nevada) | L. latucelsum (104301 104351 104353) L. sp. (77181 104402) | |
| Blackhillsian | Canada (British Columbia) | L. sp. (111537) | |
| Dapingian | USA (Utah) | L. latucelsum (104239) |