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Alpkarakush kyrgyzicus
Taxonomy
Alpkarakush kyrgyzicus was named by Rauhut et al. (2024) [Holotype: "Partial skeleton (Fig. 3), including both postorbitals (IGB 2-1, 2-2), the left quadratojugal (IGB 2-9), two posterior dorsal vertebral centra (IGB 2-10,2-11), two partial dorsal neural spines (IGB 2-12, 2-13) and a fragment of the dorsal neural arch (IGB 2-22), five sacral vertebrae (IGB 2-14, 2-15), several dorsal ribs (IGB 2-16, 2-17, 2-18, 2-19, 2-20, 2-21), a manual phalanx (IGB 2-24), a manual ungual (IGB 2-47), a partial left ilium (IGB 2-25), a partial pubes (IGB 2-26, 2-27, 2-28, 2-29), both articulated ischia (IGB 2-30, 2-31), a complete left (IGB 2-32) and right (IGB 2-33) femora, a complete left (IGB 2-34) and right tibiae (IGB 2-35), an almost complete left fibula (IGB 2-36, 2-37), left and right astragalocalcanea (IGB 2-38, 2-39), a partial left distal tarsal IV (IGB 2-40), a left metatarsal II (IGB 2-41), a left and right metatarsal III (IGB 2-42, 2-43), a pedal phalanx (IGB 2-44), and two pedal unguals (IGB 2-45, 2-46)." (Rauhut et al., 2024)]. Its type specimen is See Technical comments, a partial skeleton, and it is a 3D body fossil. Its type locality is FTU-1, Uurusai Valley, which is in a Callovian terrestrial sandstone/mudstone in the Balabansai Formation of Kyrgyzstan. It is the type species of Alpkarakush.
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Alpkarakush kyrgyzicus Rauhut 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.
†Alpkarakush kyrgyzicus Rauhut et al. 2024
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. W. M. Rauhut et al. 2024 | Alpkarakush kyrgyzicus can be diagnosed by the following combination of characters (autapomorphies are indicated by *): extremely developed supraorbital brow on the postorbital, overhanging the orbit; posterior dorsal vertebrae with a channel leading from the centroprezygodiapophyseal fossa posteromedially into pneumatic chambers in the neural arch*; sacral vertebrae with fused neural spines that are approximately as high as the combined height of the vertebral centrum plus neural arch; manual phalanx II-1 with a ventral sulcus proximally that is almost completely enclosed by medial and lat- eral ventral flanges*; dorsal margin of the ilium slopes steeply posteroventrally*; brevis fossa on ilium reduced to a small medial shelf; shaft of pubis strongly bowed anteriorly; well-developed longitudinal depression on the posterolateral side of the pubic shaft adjacent to the pubic boot (based on paratype); unusually high pubis/tibia ratio (1.22 or higher); articulated ischia with pronounced ischial boots that are convex distally and fused anteriorly, but separated posteriorly; ischium with small obturator flange that is offset from the pubic peduncle; pubic peduncle of ischium very long; iliac articulation in proximal ischium cup-shaped; narrow and deep intercondylar groove on the anterior side of distal femur*; robust and well-developed medial epicondylar crest on distal femur, considerably offset proximally from distal end*; tibia with robust, bulbous fibular flange; astragalus and calcaneum fused. |
Measurements
No measurements are available
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| Source: o = order | |||||
| References: Marsh 1875, Kiessling 2004 | |||||