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Suminia
Taxonomy
Suminia was named by Ivakhnenko (1994). It is not extant.
It was assigned to Galeopsidae by Ivakhnenko (1994); to Galeopidae by Battail and Surkov (2000), Ivakhnenko (2003) and Ivakhnenko (2008); to Venyukovioidea by Kammerer and Angielczyk (2009); and to Venyukovioidea by Fröbisch and Reisz (2011).
It was assigned to Galeopsidae by Ivakhnenko (1994); to Galeopidae by Battail and Surkov (2000), Ivakhnenko (2003) and Ivakhnenko (2008); to Venyukovioidea by Kammerer and Angielczyk (2009); and to Venyukovioidea by Fröbisch and Reisz (2011).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Suminia Ivakhnenko |
| 2000 | Suminia Battail and Surkov |
| 2003 | Suminia Ivakhnenko |
| 2008 | Suminia Ivakhnenko |
| 2009 | Suminia Kammerer and Angielczyk |
| 2011 | Suminia Fröbisch and Reisz |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. F. Ivakhnenko 1994 | Skull short and high; height at level of middle of orbital length fitting approximately 2.5 times into skull length, and length of its preorbital part 3 times. Tooth row of upper jawbone horizontal, quite long, and in upper jaw having up to 12 teeth. Dentary bone of lower jaw fairly low, almost not exceeding height of anterior incisors. Zygomatic arch convex upward approximately to level of middle of hight orbit. | |
| J. Fröbisch and R. R. Reisz 2011 | Small venyukovioid characterized by the following autapomorphies: large orbit, nearly one-third of skull length; frontal–parietal suture occurring at rim of pineal foramen; postorbital–squamosal contact present ventrally (convergent with Chainosauria); teeth large relative to skull; wear facets nearly parasagittal; tooth wear striations indicate propalinal motion of mandible that extends each dentary tooth
across at least two maxillary teeth; reduced number of 23 presacral and therein 17 dorsal vertebrae; centra of cervical vertebrae longer than wide, indicating an elongate neck; transverse processes of caudal vertebrae fuse to long caudal ribs; procoracoid with indentation at ventromedial margin rather than foramen; iliac blade with robust ridge on anterior edge of medial surface; pubis with puboischiadic fenestra and separate pubic foramen; limbs elongated; manus equals 40% of forelimb length; distal carpal 1 and tarsal 1 enlarged, phalangiform, and diverge laterally; metacarpal I short and robust; crescent-shaped distal tarsal 4; penultimate phalanges elongated; manual phalangeal formula 2-3-4-5-3 and pedal phalangeal formula 2-3-4-5-4, with discshaped phalangeal elements in digits III and IV (manus and pes) and digit V (pes only). |
Measurements
No measurements are available
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| Source: o = order, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Benton 1983, Carroll 1988 | |||||
Age range: Late/Upper Severodvinian or 264.28000 to 259.51000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Severodvinian | Russian Federation (Kirov) | S. getmanovi (28854) | |
| Late/Upper Severodvinian | Russian Federation (Orenburg) | S. getmanovi (189501) S. sp. (189503) | |
| Late/Upper Severodvinian | Russian Federation (Vologda) | S. getmanovi (189125) S. sp. (187752 187928) |