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Aizengyps
Taxonomy
Aizengyps was named by Emslie (1998). Its type is Aizengyps toomeyae. It was considered unknown by Emslie (1998).
It was assigned to Vulturidae by Emslie (1998).
It was assigned to Vulturidae by Emslie (1998).
Species
A. toomeyae (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Aizengyps Emslie pp. 29-32 fig. 7 |
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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 | |
|---|---|---|
| S. D. Emslie 1998 | Tarsometatarsus recognized as Vulturidae by deep anterior metatarsal
groove, large intercondylar process, and shape and relative position of the trochleae; humerus with deep, elongated brachial impression, large ectepicondylar and entepicondylar prominences, and deep and broad ligamental furrow (Rea 1983). Tarsometatarsus differs from Plesiocathartes, Diatropornis, Gyrnnogyps, Breagyps, Vultur, Geronogyps, Sarcoramphus, Pliogyps, Coragyps,and Cathartes by shaft more robust (see measurements below); shaft straight with little flaring at proximal and distal ends as in Hadrogyps (shaft distinctly flared in Vultur, Sarcoramphus, Geronogyps, Pliogyps, Brasilogyps, Cathartes, and Coragyps); anterior metatarsal groove deeper proximally and extends more than half the length of the shaft as in Sarcoramphus (groove shallower in Gymnogyps, extends only to half the length of the shaft in Gymnogyps, Vultur, Geronogyps, Breagyps, Cathartes, and Coragyps); proximal and distal foramina small (foramina distinctly larger in Hadrogyps, moderately large in Pliogyps); external surface of intercotylar prominence with deep notch (notch shallow to absent in Gymnogyps, Vultur, Sarcoramphus, Cathartes, and Coragyps); intercotylar depression in proximal view large, round, and deeply excavated (depression small and shallow in Gymnogyps, Vultur, Sarcoramphus, Cathartes, and Coragyps); in posterior view, hypotarsus forms broad plate that is nearly as deep (proximo-distally) as it is wide (similar in Coragyps; plate is distinctly broader than it is deep in Gymnogyps, Vultur, Geronogyps, Pliogyps, and Sarcoramphus); proximal external border of hypotarsus without notch as in Cathartes (deep to shallow notch present in Vultur and Geronogyps, notch shallow to absent in Gymnogyps and Coragyps); presence of deep excavation on posterior proximal shaft, internal to ridge below hypotarsus (shaft shallowly to moderately excavated in Gymnogyps, Vultur, Sarcoramphus, Cathartes, and Coragyps); ridges on posterior borders of internal and external shaft high and distinct (ridges low and less distinct in Gyrnnogyps, Sarcorarnphus, Cathartes, and Coragyps); metatarsal facet oriented nearer internal side of shaft as in Vultur and Cathartes (facet positioned more posterior in Gymnogyps, Sarcoramphus, and Coragyps); shaft above external trochlea depressed and angled externally to point level with proximal border of metatarsal facet (little or no depressed area in Gymnogyps, Vultur, Geronogyps, Sarcoramphus, Cathartes, and Coragyps); middle trochlea short proximo-distally as in Gymnogyps (longer in Vultur and Hadrogyps). Humerus with deltoid crest broad and flared as in Geronogyps, Cathartes, and Coragyps, extending farther distally before joining shaft (crest is smaller, less flared, and joins shaft more proximally in Gymnogyps, Vultur, and Sarcoramphus); pneumatic foramen shallow with broad, rounded proximal border as in Cathartes (foramen deep in Gymnogyps, Vultur, and Coragyps, shallow to deep in Sarcoramphus, and with narrow proximal border in Gymnogyps); groove between head and internal tuberosity deep (groove shallow in Gymnogyps, shallow to moderately deep in Vultur and Sarcoramphus, groove pneumatic to partially pneumatic in Coragyps and Cathartes); internal border of deltoid crest large and prominent and distinctly raised above level of shaft (crest remains flush or only slightly raised above shaft in Geronogyps, Gymnogyps, Vultur, Sarcoramphus, Cathartes, and Coragyps); deltoid crest ends distally with large, oblong tubercle (tubercle is smaller and more rounded in Gymnogyps, Vultur, Cathartes, and Coragyps); impression of M. brachialis anticus without pneumatism (impression pneumatic in Coragyps and longer proximo-distally in Cathartes); attachment for anterior articular ligament broad as in Vultur (attachment is narrower in Gymnogyps and Cathartes). Measurements of modern and fossil condor humeri are provided in Table 6. |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Marsh 1875, Naka 2004, Kiessling 2004 | |||||
Age range: Early/Lower Pleistocene or 2.58000 to 0.77400 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Pleistocene | USA (Florida) | A. toomeyae (19750) |