North American Recent Soft-Shelled Turtles (Family Trionychidae)Webb, Robert G. (Robert Gravem)
Science
North American Recent Soft-Shelled Turtles (Family Trionychidae)
Webb, Robert G. (Robert Gravem)
Soft-shelled turtles
I have not seen the type. Garden's original description (_in_ Pennant, 1772:268-271)
leaves little doubt that the text subject is a large adult female of _ferox_
(see especially the statements, "fore part, [of carapace] just where it covers the
head and neck, is studded full of large knobs, [and] The under, or belly plate,
... is ... extended forward two or three inches more than the back
plate, ..."). I am indebted to Mr. J. C. Battersby, British Museum (Natural
History), Department of Zoology (Reptiles), for information concerning
the type and for comparing it with the text description and three figures published
by Pennant. The carapace of the type is approximately 16 inches long,
13-1/2 inches wide, and has low, flattened, knoblike tubercles along the anterior
edge. Some inaccuracies on the part of the artist (such as five claws on both
feet on the right side of Fig. 3, and four claws on the left front foot of Fig. 2 are
evident), and slight changes in the proportions of the type would have occurred
after death and preservation. It is the opinion of Mr. Battersby that the type,
text description and three figures represent one specimen. Figures 1 and 2,
dorsal and ventral views respectively, probably represent the same specimen
from life; the neck is withdrawn and the tail tip is visible in dorsal view, but
concealed beneath the posterior edge of the carapace in ventral view. Presumably
the same specimen (probably drawn from dried and stuffed animal)
is depicted in Figure 3 (dorsal view); the neck is fully extended and a large
part of the thick, pyramidal tail is visible in dorsal view. British Museum (Natural
History) 1947.3.6.17 is considered a holotype. The three figures published
by Pennant have been duplicated by Schoepff (1795:Pl. 19) and Duméril and
Bibron (1835:482). To my knowledge, the holotype was first specifically designated
as the "(Type.)" of _T. ferox_ by Boulenger (1889:259). The skull of the
holotype is figured by Stejneger (1944:Pl. 5).
Garden did not list a specific locality for the two specimens that he sent to
London, but did mention that the turtle was common in the Savannah and
Altamaha rivers (of Georgia), and rivers in east Florida. Boulenger (_loc. cit._)
stated that the locality of the holotype was "Georgia." Baur (1893:220) restricted
the type locality to the "Savannah river, Ga." Neill (1951:17), who
believed _T. ferox_ to be absent from the Savannah River, changed the type
locality of _ferox_ to east Florida. Schwartz (1956:8) reappraised the status of
softshells in Georgia and Florida and reëstablished the Savannah River (at
Savannah), Georgia, as the type locality of _T. ferox_.
Pennant failed to use binomial nomenclature when he published the type
description of Garden. The first name-combination (_Testudo ferox_) was proposed
by Schneider (1783:220).
Public-domain text, read in full here on John Shaqi.
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