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Shishugounykus inexpectus
Taxonomy
Shishugounykus inexpectus was named by Qin et al. (2019). It is not extant. Its type specimen is IVPP V23567, a partial skeleton. Its type locality is Shishugounykus site, Wucaiwan [PROXY], which is in an Oxfordian fluvial mudstone in the Shishugou Formation of China. It is the type species of Shishugounykus.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Shishugounykus inexpectus Qin et al. |
| 2023 | Shishugounykus inexpectus Averianov et al. p. 67 |
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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.
†Shishugounykus inexpectus Qin et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z. Qin et al. 2019 | Shishugounykus inexpectus differs from all other alvarezsaurians in having the following unique combination of features (* marks the autapomorphies; we use the II-III-IV identity of manual digits in tetanurans): supratemporal fossa occupying large portion of frontal and with indistinct anterior border (sharp anterior border in early-branching alvarezsaurians such as Haplocheirus sollers and supratemporal fossa occupying a small portion of frontal in late-branching alvarezsaurians); scapula with hollow acromial process but without lateral concavities*; humeral internal tuberosity mediolaterally constricted distally*, giving it a “pinched” appearance; metacarpal III straight in dorsal view (laterally bowed in most other alvarezsaurians including Haplocheirus sollers); ungual III-3 subequal in size to ungual II-2 (considerably smaller in most other alvarezsaurians including Haplocheirus sollers); iliac medial surface with step-wise transition from ischial peduncle to pubic peduncle*; distal end of metatarsal II asymmetrically ginglymoid*. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||