| Citation: |
Shu-bin Ju, Xu-ri Wang, Yi-chuan Liu, Yang Wang, 2021. A reassessment of Iteravis huchzermeyeri and Gansus zheni from the Jehol Biota in western Liaoning, China, China Geology, 4, 197-204. doi: 10.31035/cg2020066
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A reassessment of Iteravis huchzermeyeri and Gansus zheni from the Jehol Biota in western Liaoning, China
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Abstract
The authors reassessed the taxonomic distinction of Iteravis huchzermeyeri and Gansus zheni, which are two species of Ornithuromorpha based on specimens from the same locality in western Liaoning and derive from the Jehol Biota. The detailed comparisons of the holotype and referred specimens of both species, reveal no anatomical features that distinguish these taxa as separate species. Some minor differences are considered to relate to ontogenetic or interspecific differences. The stratigraphic occurrence for both specimens is the Lower Cretaceous Jiufotang Formation. Accordingly, the authors conclude that Iteravis huchzermeyeri has priority, by 15 days, for this taxon and that Gansus zheni is a junior synonym. The diagnosis of Iteravis huchzermeyeri is revised based on further study on all specimens referred to this species. Its generic distinction from Gansus is maintained thereby removing a potential genus-level correlation linking Xiagou Formation in Gansu Province with the Jiufotang Formation in Liaoning Province.
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Keywords:
- Jehol Biota /
- Lower Cretaceous /
- Ornithuromorpha /
- Synonym /
- Western Liaoning /
- Geological survey engineering /
- China
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References
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Shu-bin Ju, Xu-ri Wang, Yi-chuan Liu, Yang Wang, 2021. A reassessment of Iteravis huchzermeyeri and Gansus zheni from the Jehol Biota in western Liaoning, China, China Geology, 4, 197-204. doi: 10.31035/cg2020066
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Figure 1.
Photograph of the skull of Iteravis huchzermeyeri IVPP V18958 (a) (under normal light) and Gansus zheni BMNHC-Ph 1318 (b) (under UV lamp). prm–premaxilla; m–maxilla; d–dentary; t–teeth; hy–hyoid; l–lacrimal; eth–ethmoid; sa–surangular; q–quadrate; f–frontal.
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Figure 2.
Photograph of the thoracic girdle and sternum of Iteravis huchzermeyeri IVPP V18958 (a) and Gansus zheni BMNHC-Ph 1342 (b); Photograph of the thoracic girdle of Gansus yumensensis (c); Photograph of the sternum of Gansus yumensensis (d). fu–furcula; co–coracoid; sc–scapula; st–sternum; k–keel; lap–laterodistal process; g–gastroliths.
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Figure 3.
Photograph of the forelimbs of Iteravis huchzermeyeri IVPP V18958 (a), Gansus zheni BMNHC-Ph1342 (b) and Gansus yumenensis (c) (d). rhu–right humerus; hu–humerus; rul–right ulna; ul–ulna; rra–right radius; ra–radius; al–alular metacarpal; mm–major metacarpal; mi–minor metacarpal; al1/2–alular digit 1/2; mm1/3–major digit 1/3; mi1–minor digit 1; co–coracoid; sc–scapula.
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Figure 4.
Photograph of the hindlimbs and pelvic girdles of Iteravis huchzermeyeri IVPP V18958 (a), Gansus zheni BMNHC-Ph 1342 (b) and Gansus yumenensis (c). il–ilium; pu–pubis; is–ischium; fem–femur; ti–tibiotarsus; tmt–tarsometatarsus; I–pedal digit I; II–pedal digit II; III–pedal digit III; IV–pedal digit IV; st–sternum; syn–synsacrum; g–gastroliths.
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Figure 5.
Life scene of Iteravis huchzermeyeri (drawn by Chuang Zhao).