Hyla arenicolor—Canyon Treefrog // Hyla wrightorum—Arizona Treefrog // Pseudacris triseriata—Western Chorus Frog
Treefrogs are small anurans noted for their climbing abilities. Although frequently active out of water, water will be nearby.
Rancholabrean (Sangamonian): Papago Springs Cave (Czaplewski and Mead et al. 1999).
Mid Wisconsin: Papago Springs Cave (Czaplewski and Mead et al. 1999).
Literature. Czaplewski and Mead et al. 1999.
An inhabitant of rocky canyons, this small frog is tentatively identified only by a single element (a 3rd vertebra) from a single stratigraphic level (150-160 cm) from Howell's Ridge Cave. Van Devender and Worthington (1977) separated it from H. eximia wrightorum on the basis of the relatively larger neural canal.
Fig. 1. Canyon Treefrog (Hyla arenicolor). Photograph by Carl S. Lieb.
The pads that can be seen at the end of the toes allow these frogs to easily climb vertical surfaces and are typical of the members of the family.
Late Wisconsin/Holocene: Howell's Ridge Cave (Van Devender and Worthington 1977: cf.).
Literature. Van Devender and Worthington 1977.
Synonyms. Hyla eximia.
Lindsay (1984) reported Hyla eximia from California Wash. Since then, the northern populations have been recognized as a separate species, H. wrightorum (Duellman 2001).
The Arizona Treefrog currently occurs in the mountains of central Arizona and central-western New Mexico. A disjunct population occurs in the Huachuca Mountains of southeastern Arizona, and other populations occur south in Mexico. Occurrence usually is in damp or wet areas such as along streams or in marshes in higher elevations.
Late Blancan: California Wash (Lindsay 1984)
Literature. Duellman 2001; Lindsay 1984.
Both Holman (1970) and Applegarth (1979) have identified this small hylid from Dry Cave sites. Applegarth placed the point of nearest known modern occurrence as 327 km to the northwest and interpreted the frog as very common near the cave and indicative of "substantial winter snowfall and plenty of green grass in the summer" (p. 86).
Fig. 1. Western Chorus Frog (Pseudacris triseriata). Photograph courtesy of US Geological Survey, Upper Midwest Environmental Sciences Center.
Medial Irvingtonian: SAM Cave (Rogers et al. 2000).
Late Wisconsin: Animal Fair 18-20 ka (Applegarth 1979); Harris' Pocket (Holman 1970); TT II (Harris 1993c).
Late Wisconsin/Holocene: SAM Cave (Rogers et al. 2000).
Literature. Applegarth 1979; Holman 1970; Rogers et al. 2000.
Last Update: 21 Nov 2012