Texella reyesi - Ubick and Briggs, 1992
Bone Cave Harvestman
Taxonomic Status: Accepted
Unique Identifier: ELEMENT_GLOBAL.2.114815
Element Code: ILARA25020
Informal Taxonomy: Animals, Invertebrates - Spiders and Other Chelicerates - Spiders and Other Arachnids
 
Kingdom Phylum Class Order Family Genus
Animalia Chelicerata Arachnida Opiliones Phalangodidae Texella
Genus Size: C - Small genus (6-20 species)
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Concept Reference
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Concept Reference: Ubick, D. and T.S. Briggs. 1992. The harvestman family Phalangodidae. 3. Revision of Texella Goodnight and Goodnight (Opiliones: Laniatores). Texas Mem. Mus., Speleol. Monogr. 3:155-240.
Concept Reference Code: A92UBI01EHUS
Name Used in Concept Reference: Texella reyesi
Taxonomic Comments: This species is weakly differentiated from Texella redelli (Ubick and Briggs, 1992).
Conservation Status
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NatureServe Status

Global Status: G2G3
Global Status Last Reviewed: 21Aug2002
Global Status Last Changed: 21Aug2002
Rounded Global Status: G2 - Imperiled
Reasons: Was recently discovered to be more widespread than originally thought (USFWS, 1994). However, habitat is limited to specialized caves that are threatened by local development.
Nation: United States
National Status: N2N3 (21Aug2002)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Texas (S2)

Other Statuses

U.S. Endangered Species Act (USESA): LE: Listed endangered (18Aug1993)
Comments on USESA: In a 90-day petition finding to remove this species (i.e. "delist"), FWS (2017) has found that the petitioned action may be warranted and are requesting more information for a status review.
U.S. Fish & Wildlife Service Lead Region: R2 - Southwest

NatureServe Global Conservation Status Factors

Range Extent: <100-250 square km (less than about 40-100 square miles)
Range Extent Comments: Distributed along a 40 km distance in Travis and Williamson counties in central Texas (USFWS, 1994).

Number of Occurrences: Unknown
Number of Occurrences Comments: Known from approx. 69 locations (USFWS, 1994).

Overall Threat Impact Comments: A major residential, commercial, and industrial development has been proposed for a large section of the range for this spider, particularly Weldon Cave. Alteration of drainage patterns and input of contaminants (e.g., sediment, pesticides and fertilizers) caused by development of area could be harmful to caves (USFWS, 1988).

Other NatureServe Conservation Status Information

Distribution
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Global Range: (<100-250 square km (less than about 40-100 square miles)) Distributed along a 40 km distance in Travis and Williamson counties in central Texas (USFWS, 1994).

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map
Endemism: endemic to a single state or province

U.S. & Canada State/Province Distribution
United States TX

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
TX Travis (48453), Williamson (48491)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
12 San Gabriel (12070205)+, Austin-Travis Lakes (12090205)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: An eyeless, pale orange cave spider. Harvestman spiders are often referred to as " daddy longlegs".
Ecology Comments: The isolation of these caves has led to highly localized and distinct cave faunas.
Non-Migrant: N
Locally Migrant: N
Long Distance Migrant: N
Subterranean Habitat(s): Subterrestrial
Special Habitat Factors: Subterranean obligate
Habitat Comments: Occurs in very small isolated karst caves within the Edwards Limestone Formation. It is often found under large rocks. This spider is particularly sensitive to humidities below saturation and when caves are warm and dry can be found only in the coolest part of the cave (Campbell, 1995).
Adult Food Habits: Invertivore
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
Help
Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 14Aug1995
NatureServe Conservation Status Factors Author: Morrison, M.
Element Ecology & Life History Edition Date: 14Aug1995

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

References
Help
  • Campbell, L. 1995. Endangered and Threatened Animals of Texas: Their Life History and Management. Texas Parks and Wildlife Department, Endangered Resources Branch, Austin, Texas. ix + 129 pp.

  • ELLIOTT, W.R. 1992. ENDANGERED AND RARE KARST SPECIES IN TRAVIS COUNTY, TEXAS: OPTIONS FOR THE BALCONES CANYONLANDS CONSERVATION PLAN. PREPARED FOR THE BCCP, USFWS, TPWD, AND TNC.

  • U.S. Fish and Wildlife Service (USFWS). 1988. Endangered and threatened wildlife and plants; determination of endangered status for the James spinymussel. Federal Register 53(141): 27689-93.

  • U.S. Fish and Wildlife Service (USFWS). 1993. Endangered and Threatened Wildlife and Plants: Coffin Cave Mold Beetle (Batrisodes texanus) and the Bone Cave Harvestman (Texella reyesi) Determined to be Endangered. Federal Register 58(158):43818-19.

  • U.S. Fish and Wildlife Service (USFWS). 1994. Endangered and Threatened Wildlife and Plants: 90-day Finding on a Petition to Delist Seven Texas Karst Invertebrates. Federal Register. 59(49):11755-58.

  • Ubick, D. and T.S. Briggs. 2004. The harvestman family Phalangodidae. 5. New records and species of Texella Goodnight and Goodnight (Opiliones: Laniatores). Texas Memorial Museum. Speleological Monographs, 6:101-141.

  • Ubick, D. and T.S. Briggs. 1992. The harvestman family Phalangodidae. 3. Revision of Texella Goodnight and Goodnight (Opiliones: Laniatores). Texas Mem. Mus., Speleol. Monogr. 3:155-240.

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