Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Trackways of the American Crocodile (Crocodylus acutus) in Northwestern Costa Rica: Implications for Crocodylian Ichnology

Farlow, JO, Robinson, NJ, Kumagai, CJ, Paladino, FV, Falkingham, PL, Elsey, RM and Martin, AJ (2017) Trackways of the American Crocodile (Crocodylus acutus) in Northwestern Costa Rica: Implications for Crocodylian Ichnology. Ichnos. ISSN 1563-5236

TACwithFigures_PLFcomments.pdf - Accepted Version

Download (3MB) | Preview


We documented trackways of free-living Crocodylus acutus on beaches at the mouths of Tamarindo and Ventanas estuaries, Costa Rica. Our crocodiles had estimated total lengths of 1–3 meters or more. Manus prints have five digits, with digits I–III bearing claw marks. Pes prints have four digits, with claw marks on digits I–III. The pes is plantigrade. Claws generally dig into the substrate. Apart from claw marks, digit I and the heel of the pes are usually the most deeply impressed parts of footprints. Trackways are wide-gauge. Pes prints are usually positioned just behind ipsilateral manus prints of the same set and may overlap them. Manus and pes prints angle slightly outward with respect to the crocodile’s direction of movement. Claw-bearing digits of both the manus and pes may create curved, concave-toward-the-midline drag marks as the autopodium is protracted. The tail mark varies in depth and clarity, and in shape from nearly linear to markedly sinuous. Sometimes the tail mark hugs the trackway midline, but sometimes it is closer to, or even cuts across, prints of one side. American crocodile footprints and trackways are similar to those observed in other extant crocodylian species, indicating substantial trackway conservatism across the group

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Ichnos on 31/07/17, available online: http://www.tandfonline.com/10.1080/10420940.2017.1350856
Uncontrolled Keywords: 06 Biological Sciences, 0403 Geology, 0602 Ecology, 0603 Evolutionary Biology
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QL Zoology
Divisions: Natural Sciences & Psychology (closed 31 Aug 19)
Publisher: Taylor & Francis
Date Deposited: 31 Jul 2017 10:48
Last Modified: 04 Sep 2021 03:54
DOI or ID number: 10.1080/10420940.2017.1350856
URI: https://researchonline.ljmu.ac.uk/id/eprint/6865
View Item View Item