Macroscelidea

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Scopus citations

Abstract

Two incomplete mandibles (plus a third tentatively referred) and an isolated P4 of Rhynchocyon pliocaenicus are reported from Localities 2, 3, and 10E, Upper Laetolil Beds, Laetoli, Tanzania, East Africa. The specimens are dated at ca. 3.7–3.6 Ma. Morphology of this newly recovered material confirms and enhances a diagnosis based previously on only the holotype and paratype. Mean jaw depth and almost all dental measurements of R. pliocaenicus are on average about 21% smaller than those of the extant species R. cirnei, R. petersi, and R. chrysopygus. Rhynchocyon pliocaenicus is diagnosed also by a p2 with a strong posterior heel with a prominent posterior basal cusp, consistent presence of an anterobuccal cingulum on p4-m2, and a posterior cingulum on p4-m1. The protoloph of P4 and M1 of R. pliocaenicus connects to the tip of the paracone. If the habitat preferences of R. pliocaenicus were similar to extant Rhynchocyon, then the presence of this fossil species suggests that closed canopy habitats were present at Laetoli ca 3.7–3.6 Ma, but probably relatively rare.

Original languageEnglish (US)
Title of host publicationVertebrate Paleobiology and Paleoanthropology
PublisherSpringer
Pages67-74
Number of pages8
Edition9789048199617
DOIs
Publication statusPublished - Jan 1 2011

Publication series

NameVertebrate Paleobiology and Paleoanthropology
Number9789048199617
ISSN (Print)1877-9077

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Keywords

  • Elephant shrews
  • Laetoli
  • Paleoecology
  • Pliocene
  • Rhynchocyon
  • Sengis

ASJC Scopus subject areas

  • Palaeontology
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Winkler, A. J. (2011). Macroscelidea. In Vertebrate Paleobiology and Paleoanthropology (9789048199617 ed., pp. 67-74). (Vertebrate Paleobiology and Paleoanthropology; No. 9789048199617). Springer. https://doi.org/10.1007/978-90-481-9962-4_4