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John R. Holsinger and David C. Culver 
Table 9. List of cave-limited species (see text for definition) in the Holston 
basin regional fauna. Species listed in same sequence as in text (cf., 
“Review of the Fauna”). * = endemic species. TB = troglobite 
or probable troglobite. 
AQUATIC SPECIES 
Crangonyx antennatus (TB) 
Stygobromus mackini (TB) 
Caecidotea incurva (TB) 
C. recurvata (TB) 
C. richardsonae (TB) 
TERRESTRIAL SPECIES 
Glyphyalinia specus (TB) 
Anthrobia monmouthia (TB) 
Phanetta subterranea (TB) 
Porrhomma cavernicolum (TB) 
TERRESTRIAL SPECIES (continued) 
Nesticus carteri 
N. tennesseensis (TB) 
N. pavnei (TB) 
Pseudosinella orba (TB) 
Litocampa sp. B (TB) 
L. sp. E (TB) 
* Pseudanophthalmus paradoxus (TB) 
P. hoffmani (TB) 
*P. sp. A {petrunkevitchi group) (TB) 
* Batriasymmodes greeveri (TB) 
Summary: Total species = 19 (5 aquatic, 14 terrestrial); endemics - 3. 
km to the vicinity of Kingston in Roane County, Tenn., where the 
Clinch River joins the Tennessee River. The regional terrain is highly 
variable but is generally rugged and characterized by prominent ridges 
and relatively narrow valleys. However, in several places, especially in 
the northeastern half, broad coves with karsted limestone floors are 
formed between mountains, two good examples being Ward Cove in 
Tazewell County and Rye Cove in Scott County. 
Numerous belts of carbonate rock, ranging in age from Cambrian 
to Mississippian, are exposed in the basin. A total of 537 caves are 
recorded, many of which are extensive and most of which are excavated 
in Cambrian, Ordovician, and Mississippian limestones. The regional 
cavernicolous fauna contains 51 cave-limited species; 47 are troglobites, 
and 24 are endemic to the basin (Table 10). 
7. Powell Basin . — This basin lies completely within the study area 
and is drained by the Powell River and its tributaries (Fig. 2). It covers 
approximately 2278 km 2 and is defined by the eastern margin of the 
Appalachian Plateau on the northeast, north, and west, and by Powell 
Mountain on the south except in Claiborne and Union counties where 
the interfluve with the Clinch drainage is Wallen Ridge and a series of 
low, dolomitic ridges that extend across the Central Peninsula between 
the arms of Norris Lake. The Powell basin is essentially one large valley 
with generally rolling terrain of moderately low relief. However, Wallen 
Ridge on the eastern side of the Valley is a topographic feature. 
Extensive exposures of Cambrian, Ordovician, and Mississippian 
limestones and dolomites occur throughout the basin. The middle of the 
valley is floored by several broad belts of Ordovician limestone, whereas 
a significant belt of Mississippian limestone crops out along the front of 
