Proconsul (mammal)

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Proconsul
Temporal range:
Ma
Proconsul skeleton reconstruction
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Proconsulidae
Subfamily: Proconsulinae
Genus: Proconsul
Hopwood, 1933
Species

Proconsul is an

extinct genus of primates that existed from 21 to 17 million years ago during the Miocene epoch. Fossil remains are present in Eastern Africa including Kenya and Uganda. Four species have been classified to date: P. africanus, P. gitongai, P. major
and P. meswae. The four species differ mainly in body size. Environmental reconstructions for the Early Miocene Proconsul sites are still tentative and range from forested environments to more open, arid grasslands.

The

chimpanzee. It might also be ancestral to the rest of the apes
.

Description

The genus had a mixture of

Old World monkeys
.

Proconsul's monkey-like features include

arboreal quadrupedal positional repertoire. The primary feature linking Proconsul with extant apes is its lack of a tail; other "ape-like" features include its enhanced grasping capabilities, stabilized elbow joint and facial structure. Proconsul could not hang effortlessly
from tree branches like gibbons and other nonhuman apes do today.

Discovery and classification

Consul at the Belle Vue zoo, Manchester, c.1894

The first specimen, a partial jaw discovered in 1909 by a gold prospector at

Ben Brierley wrote a commemorative poem wondering where the "Missing Link" between chimpanzees and men was.[2]

Skull of Proconsul africanus at the American Museum of Natural History

Hopwood in 1931 had discovered the fossils of three individuals while expeditioning with

chimpanzee. Proconsul is therefore "ancestral to the Chimpanzee" in Hopwood's words. He also added africanus as the specific name.[1]

Other fossils discovered later were initially classified as africanus and subsequently reclassified; that is, the total pool of fossils originally considered africanus was split and the fragments lumped with other finds to create a new species. For example, Mary Leakey's famous find of 1948 began as africanus and was split from it to be lumped with Thomas Whitworth's finds of 1951 as heseloni by Alan Walker in 1993. This process creates some confusion for the public, which is told that africanus became heseloni. The finds from Koru and Songhor are still considered africanus. Four species are still defined even though many fossils have jumped species.[3]

The family of Proconsulidae was first proposed by Louis Leakey in 1963,[4] a decade after he and Wilfrid Le Gros Clark had defined africanus, nyanzae and major. It was not immediately accepted but ultimately prevailed.

The history of

hominoid classification in the second half of the 20th century is sufficiently complex to warrant a few books itself. Most of the palaeoanthropologists have changed their minds at least once as new fossils have come to light and new observations have been made, and will probably continue to do so. The classifications found in the literature of one decade are not generally the same as those of another.[5] For example, in 1987 Peter Andrews and Lawrence Martin, established palaeontologists, took the point of view that Proconsul is not a hominoid, but is a sister taxon to it.[6]

Reassigned species

The species Proconsul heseloni and P. nyanzae have been reclassified in the new genus Ekembo.[7]

Notes

  1. ^ a b Morell 1996, p. 130
  2. ^ Walker & Shipman 2005
  3. ^ Tuttle 2006, Taxonomic Shuffles, Ancestors, and Functional Interpretations: 1960–1999, p. 17
  4. ^ "Proconsulidae". Palaeodatabase.
  5. ^ A recapitulation of the changing classifications of fossils at some time regarded as Proconsul can be found in Tuttle 2006
  6. clades
    .
  7. PMID 25962549
    .

References