| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Gondwanorthis
Taxonomy
Gondwanorthis was named by Benedetto and Muñoz (2017). Its type is Nanorthis calderensis.
It was assigned to Nanorthidae by Benedetto and Muñoz (2017).
It was assigned to Nanorthidae by Benedetto and Muñoz (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Gondwanorthis Benedetto and Muñoz pp. 49 - 50 |
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. †Gondwanorthis Benedetto and Muñoz 2017
show all | hide all
†Gondwanorthis bastamensis Ghobadi Pour et al. 2011
†Gondwanorthis calderensis Benedetto 2007
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. L. Benedetto and D. F. Muñoz 2017 | Shell ventribiconvex to subequally biconvex. Ornamentation variably fascicostellate or parvicostellate; ribs rounded in profile, increasing mainly by lateral branching and, to a lesser extent, by interpolation, forming well-defined bundles distally. Medial portion of ventral valve usually accentuated by a stronger costella, which corresponds to a dorsal interspace. Ventral muscle field subtriangular or suboval in outline, with adductor field longer, wider and more elevated than diductors, bounded posteriorly by thick receding dental plates. Pedicle callist present. Notothyrial platform low, continuous with a broad, rounded median ridge not extending beyond the muscle field. Cardinal process absent or ridge-like. Fulcral plates visible at early ontogenetic stage, becoming progressively masked by secondary deposits with growth. Brachiophore plates varying through ontogeny from blade-like, subparallel, delimiting a small subrectangular notothyrial chamber, to partially or completely obliterated by secondary deposits. Dorsal muscle field quadripartite, deeply impressed; posterior adductor pair digitate or striated, of equal size or slightly larger than variably bilobed anterior adductor scars. Ventral vascular system saccate with ventral vascula media diverging laterally from their proximal extremities; dorsal vascular system apparently digitate. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Tremadoc or 486.50000 to 477.70000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tremadoc | Argentina (Salta) | Nanorthis calderensis (74346 74347) | |
| Tremadoc | Argentina (Jujuy) | Nanorthis calderensis (74348 193004) | |
| Tremadoc | Iran | Nanorthis bastamensis (185918 185921 185923 185924 185925) | |
| Tremadoc | Argentina | Nanorthis calderensis (8867 9091 159267) |