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Paterimitra pyramidalis
Taxonomy
Paterimitra pyramidalis was named by Laurie (1986) [Species comprise three sclerite types: S1, S2, L.]. Its type specimen is Australian Geological Survey Organisation, Commonwealth Palaeontological Collection (Canberra) CPC23676, a shell, and it is a 3D body fossil. Its type locality is NT 600. Todd River, 50 km south, 20 km East of Alice Springs, which is in an Atdabanian/Botomian reef, buildup or bioherm limestone in the Todd River Dolomite Formation of Australia.
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Paterimitra pyramidalis Laurie p. 446 figs. fig. 9F-J |
| 2001 | Paterimitra pyramidalis Gravestock et al. p. 116 figs. Pl. VIII, figs. 10, 11a, b |
| 2014 | Paterimitra pyramidalis Larsson et al. |
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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.
†Paterimitra pyramidalis Laurie 1986
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. M. Larsson et al. 2014 | Emended diagnosis. As for genus by monotypy.
Emended diagnosis (Paterimitra<\i>. Sclerites microscopic, apatitic by original composition, growing via basal-internal accretion. Scleritome comprising at least three clearly distinctive sclerite types: symmetrical sclerite types S1 and S2 and laterally compressed asymmetrical L sclerites. S1 sclerites pyramidal with posterior triangular notch and U-shaped anterior plate. S2 sclerites concave and acutely triangular. External surface with micro-ornament consisting of polygonal compartments. Scleritome consisting of one S2 sclerite nested within triangular notch of one S1 sclerite; multiple L sclerites lining antapical margins in additional rows forming an open tube. It differs from Eccentrotheca by the presence of two specialized bilaterally symmetrical sclerites in the scleritome and the distinct polygonal external micro-ornament. Differs from Kulparina by more regular and less compressed sclerite shape and the distinct polygonal external micro-ornament. Differs from Sunnaginia by the presence of individual sclerite types, the bilateral symmetry of S1 and S2 sclerites and the absence of right- and left-hand sclerite pairs, polygonal micro-ornament and the shell microstructure. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Kiessling 2004, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: base of the Atdabanian to the top of the Nangaoian or 521.00000 to 514.00000 Ma
Collections (64 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cambrian | Australia (South Australia) | Paterimitra pyramidalis (215324 215339 215340 215341 215343 215351 215352 215353 215354 215355 215369 215374 215375 215377 215443 215444 215445 215446 215447 215448 215449 215450 215451 215452 215454 215455 215456 215457 215458 215459 215460 215461 215462 215464 215465 215466 215467 215468 215469 215470) | |
| Atdabanian | Australia (South Australia) | Paterimitra pyramidalis (140335 140341 140343 155989 155990 172571 215326 215327 215328 215329 215330 215331 215332 215333 215335 215336 215337) Paterimitra sp. (96454) | |
| Nangaoian | China (Shanxi) | Paterimitra pyramidalis (215204) | |
| Atdabanian - Botomian | Australia (Northern Territory) | Paterimitra pyramidalis (80920 type locality: 80921) | |
| Botomian | Australia (South Australia) | Paterimitra pyramidalis (96916 96932 96959) |