Caecidotea franzi - (Holsinger and Steeves, 1971)
Franz's Cave Isopod
Synonym(s): Asellus franzi Holsinger and Steeves, 1971
Taxonomic Status: Accepted
Related ITIS Name(s): Caecidotea franzi (Holsinger and Steeves, 1971) (TSN 92738)
Unique Identifier: ELEMENT_GLOBAL.2.107292
Element Code: ICMAL01020
Informal Taxonomy: Animals, Invertebrates - Crustaceans - Isopods
 
Kingdom Phylum Class Order Family Genus
Animalia Crustacea Malacostraca Isopoda Asellidae Caecidotea
Genus Size: D - Medium to large genus (21+ species)
Check this box to expand all report sections:
Concept Reference
Help
Concept Reference: McLaughlin, P.A., D.K. Camp, M.V. Angel, E.L. Bousfield, P. Brunel, R.C. Brusca, D. Cadien, A.C. Cohen, K. Conlan, L.G. Eldredge, D.L. Felder, J.W. Goy, T. Haney, B. Hann, R.W. Heard, E.A. Hendrycks, H.H. Hobbs III, J.R. Holsinger, B. Kensley, D.R. Laubitz, S.E. LeCroy, R. Lemaitre, R.F. Maddocks, J.W. Martin, P. Mikkelsen, E. Nelson, W.A. Newman, R.M. Overstreet, W.J. Poly, W.W. Price, J.W. Reid, A. Robertson, D.C. Rogers, A. Ross, M. Schotte, F. Schram, C. Shih, L. Watling, G.D.F. Wilson, and D.D. Turgeon. 2005. Common and scientific names of aquatic invertebrates from the United States and Canada: Crustaceans. American Fisheries Society Special Publication 31: 545 pp.
Concept Reference Code: B05MCL01EHUS
Name Used in Concept Reference: Caecidotea franzi
Conservation Status
Help

NatureServe Status

Global Status: G2G4
Global Status Last Reviewed: 21Aug2002
Global Status Last Changed: 21Aug2002
Rounded Global Status: G3 - Vulnerable
Reasons: Although populations are currently stable, long-term viability is questionable in 3 of 5 populations due to groundwater pollution potential.
Nation: United States
National Status: N2N4 (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 Kentucky (SNR), Maryland (S1), Pennsylvania (S1), West Virginia (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent: 250-20,000 square km (about 100-8000 square miles)
Range Extent Comments: Three populations in western Maryland and one population in adjacent West Virginia are located within an area of 62 square miles. The remaining population in central Pennsylvania is 115 mi NNE. This range includes the eastern margin of of the Appalachian Plateau and the western edge of the Ridge and Valley physiographic regions.

Number of Occurrences: Unknown
Number of Occurrences Comments: All five known populations in three states are extant. Three recently discovered and much additional habitat in PA unsurveyed.

Population Size: Unknown
Population Size Comments: Unknown. Much of subterranean habitat is inaccessible to researchers. Less than 500 observed in accessible portions of their habitats rangewide.

Overall Threat Impact Comments: Threats include groundwater pollution and flow alteration resulting from agriculture, forestry practices, development, and careless spelunkers.

Intrinsic Vulnerability Comments: Adapted to stable subterranean environment. Low reproductive capacity.

Other NatureServe Conservation Status Information

Inventory Needs: Inventory caves and springs between extant sites in western Maryland and central Pennsylvania.

Protection Needs: Efforts should be made to protect all locations.

Distribution
Help
Global Range: (250-20,000 square km (about 100-8000 square miles)) Three populations in western Maryland and one population in adjacent West Virginia are located within an area of 62 square miles. The remaining population in central Pennsylvania is 115 mi NNE. This range includes the eastern margin of of the Appalachian Plateau and the western edge of the Ridge and Valley physiographic regions.

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 nation

U.S. & Canada State/Province Distribution
United States KY, MD, PA, WV

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MD Allegany (24001), Garrett (24023)
PA Centre (42027), Indiana (42063)
WV Mineral (54057)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
02 Upper Juniata (02050302)+, North Branch Potomac (02070002)+
05 Conemaugh (05010007)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Help
Basic Description: An aquatic subterranean isopod.
Non-Migrant: N
Locally Migrant: N
Long Distance Migrant: N
Subterranean Habitat(s): Subaquatic
Special Habitat Factors: Subterranean obligate
Habitat Comments: Found under gravels in small subterranean streams, a spring upwelling, and a flooded mine in Mississippian and Ordovician limestone strata.
Economic Attributes Not yet assessed
Help
Management Summary
Help
Biological Research Needs: Dimilin effects on groundwater invertebrate populations.
Population/Occurrence Delineation Not yet assessed
Help
Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
Help
Authors/Contributors
Help
NatureServe Conservation Status Factors Edition Date: 02Oct1992
NatureServe Conservation Status Factors Author: Feller, D.
Element Ecology & Life History Edition Date: 23Jan1991
Element Ecology & Life History Author(s): FITZPATRICK, J. F.

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

References
Help
  • HOLSINGER, J.R. AND H.R. STEEVES, III. 1971. A NEW SPECIES OF SUBTERRANEAN ISOPOD CRUSTACEAN (ASELLIDAE) FROM THE CENTRAL APPALACHIANS, WITH REMARKS ON THE DISTRIBUTION OF OTHER ISOPODS OF THE REGION. PROC. BIOL. SOC. WASH. 84(23): 189-200.

  • Holsinger, J.R. and H.R. Steeves, III. 1971. A new species of subterranean isopod crustacean (Asellidae) from the central Appalachians, with remarks on the distribution of other isopods of the region. Proceedings of the Biological Society of Washington, 84(23):189-200.

  • Lewis, J.J. and T.E. Bowman. 2010. The subterranean asellids of Maryland; description of Caecidotea nordeni, new species, and new records of C. holsingeri and C. franzi (Crustacea: Malacostraca: Isopoda). Journal of Cave and Karst Studies 72(2):100-104.

  • McLaughlin, P.A., D.K. Camp, M.V. Angel, E.L. Bousfield, P. Brunel, R.C. Brusca, D. Cadien, A.C. Cohen, K. Conlan, L.G. Eldredge, D.L. Felder, J.W. Goy, T. Haney, B. Hann, R.W. Heard, E.A. Hendrycks, H.H. Hobbs III, J.R. Holsinger, B. Kensley, D.R. Laubitz, S.E. LeCroy, R. Lemaitre, R.F. Maddocks, J.W. Martin, P. Mikkelsen, E. Nelson, W.A. Newman, R.M. Overstreet, W.J. Poly, W.W. Price, J.W. Reid, A. Robertson, D.C. Rogers, A. Ross, M. Schotte, F. Schram, C. Shih, L. Watling, G.D.F. Wilson, and D.D. Turgeon. 2005. Common and scientific names of aquatic invertebrates from the United States and Canada: Crustaceans. American Fisheries Society Special Publication 31: 545 pp.

  • NORDEN, A.W. 1981. LETTER OF 30 OCTOBER TO G. FENWICK WITH A 13 PAGE ATTACHMENT, A SURVEY OF THE RARE FRESHWATER INVERTEBRATES OF MARYLAND.

  • U.S. Fish and Wildlife Service (USFWS). 1989a. Endangered and threatened wildlife and plants; animal notice of review. Federal Register, Department of the Interior 54(4): 554-579.

Use Guidelines & Citation

Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of March 2019.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2019 NatureServe, 2511 Richmond (Jefferson Davis) Highway, Suite 930, Arlington, VA 22202, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2019. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.