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Determination of Endangered Status For Federal Register / Vol. 67, No. 157 / Wednesday, August 14, 2002 / Rules and Regulations 52879 Channel and Class Modifications Federal Communications Commission. Background [Upgrades] by Applications, 8 FCC Rcd John A. Karousos, The Tumbling Creek cavesnail 4735 (1993). Assistant Chief, Audio Division, Media (Antrobia culveri) was described as a DATES: Effective August 14, 2002. Bureau. new species by Hubricht (1971) from [FR Doc. 02–20597 Filed 8–13–02; 8:45 am] FOR FURTHER INFORMATION CONTACT: specimens taken by David Culver, Kathleen Scheuerle, Media Bureau, BILLING CODE 6712–01–P Thomas Aley, and Leslie Hubricht in (202) 418–2180. 1969 and 1970. Antrobia culveri is the type species for the genus Antrobia, also SUPPLEMENTARY INFORMATION: This is a described new to science in 1971 by summary of the Commission’s Report DEPARTMENT OF THE INTERIOR Hubricht. Hershler and Hubricht (1988) and Order, adopted July 31, 2002, and Fish and Wildlife Service examined specimens of A. culveri and released August 2, 2002. The full text of confirmed the taxonomic placement of this Commission decision is available 50 CFR Part 17 this species in the subfamily for inspection and copying during Littoridininae of the Gastropod family regular business hours at the FCC RIN 1018–AI19 Hydrobiidae. They also noted the Reference Information Center, Portals II, similarity of the genus Antrobia to, but 445 12th Street, SW., Room CY–A257, Endangered and Threatened Wildlife distinguished it from, the genus Washington, DC, 20554. This document and Plants; Determination of Fontigens, which contains cave-adapted may also be purchased from the Endangered Status for the Tumbling snails found in other caves and springs Commission’s duplicating contractor, Creek Cavesnail of the Ozark Plateau in Missouri and Qualex International, Portals II, 445 Arkansas. The Tumbling Creek 12th Street, SW., Room CY–B402, AGENCY: Fish and Wildlife Service, cavesnail is a small, white, blind, Washington, DC 20554, telephone 202– Interior. aquatic snail. Hubricht (1971) provided 863–2893, facsimile 202–863–2898, or ACTION: Final rule. the following measurements of the type via e-mail [email protected]. SUMMARY: We, the Fish and Wildlife specimen: height 2.3 millimeters (mm) List of Subjects in 47 CFR Part 73 Service (Service), determine the (0.09 inches (in)); diameter 2.0 mm (0.08 in); aperture height 1.2 mm (0.05 in); Radio, Radio broadcasting. Tumbling Creek cavesnail (Antrobia culveri) to be an endangered species aperture diameter 1.1 mm (0.04 in); with Part 73 of title 47 of the Code of under the Endangered Species Act of a small, conical, well-rounded, pale- Federal Regulations is amended as 1973, as amended (Act). This species is yellow shell containing about 3.5 follows: known to occur in one cave in Missouri. whorls (Hubricht 1971). The Tumbling Creek cavesnail is restricted to a single PART 73—RADIO BROADCAST The distribution of this species in cave stream in Tumbling Creek Cave in SERVICES Tumbling Creek has decreased by 90 percent since 1974. Although cavesnail Taney County, southwestern Missouri. 1. The authority citation for part 73 numbers fluctuated seasonally and Greenlee (1974) provided the first continues to read as follows: annually between 1996 and 2000, the information on the habitat of the species. He reported that the species Authority: 47 U.S.C. 154, 303, 334 and 336. species was not found in the monitored section of the cave stream during six was found primarily on ‘‘3 inch gravel § 73.202 [Amended] surveys in 2001 and two surveys in substrate’’ (presumably meaning small 2002. Small numbers of individuals stones or cobble of 3-inch (7.5 cm) 2. Section 73.202(b), the Table of FM continue to exist in other portions of the diameter), with a few individuals Allotments under Hawaii, is amended cave stream. Because the sudden observed using the recesses of a solid by removing Channel 284C2 and adding population decline demonstrates a rock stream bottom. Greenlee’s use of a Channel 284C at Lanai City. significant and imminent risk to the Surber Sampler, however, may have 3. Section 73.202(b), the Table of FM well-being of the Tumbling Creek biased his survey to search for rocks Allotments under Iowa, is amended by cavesnail, we find that listing this smaller than 25 cm (10 in) in diameter removing Channel 273C and adding species is necessary to provide Federal (Julian J. Lewis, J. Lewis & Associates, Channel 273C0 at Des Moines. protection pursuant to the Act. Clarksville, IN; in litt., January 27, 4. Section 73.202(b), the Table of FM DATES: This final rule is effective August 2002). Greenlee (1974) did not note Allotments under Missouri, is amended 14, 2002. whether the snails used the upper or lower surface of the 3-inch gravel he by removing Channel 223A and adding ADDRESSES: The complete file for this Channel 223C3 at Poplar Bluff. observed them on, or whether the rule is available for inspection, by species was ever observed using larger 5. Section 73.202(b), the Table of FM appointment, during normal business rocks within the cave stream. Allotments under Tennessee, is hours at the U.S. Fish and Wildlife Subsequent surveyors, however, have amended by removing Channel 299C3 Service, Columbia Field Office, 608 E. failed to document A. culveri using a and adding Channel 299C2 at Cherry St., Room 200, Columbia, MO solid rock bottom, and the species is Henderson. 65201–7712. usually observed on the undersurface of 6. Section 73.202(b), the Table of FM FOR FURTHER INFORMATION CONTACT: Paul rocks and gravel of various sizes (Ashley Allotments under Texas, is amended by McKenzie, Ph.D., Columbia Field Office unpub. data; McKenzie in litt., removing Channel 252A and adding (see ADDRESSES) (telephone: 573–876– September 16, 1996; Ashley and Channel 252C3 at Pecos and by 1911, ext. 107; e-mail: McKenzie, pers. obs.). Although removing Channel 276C3 and adding [email protected]; facsimile: 573– Greenlee (1974) stated that the Channel 276C2 at Pittsburg. 876–1914). Individuals who are hearing- Tumbling Creek cavesnail was absent 7. Section 73.202(b), the Table of FM impaired or speech-impaired may call from areas of the stream that contained Allotments under Wyoming, is amended the Federal Relay Service at 1–800–877– bat guano, subsequent observers (Ashley by removing Channel 297C2 and adding 8337 for TTY assistance. 2001a; Ashley and McKenzie, pers. obs.) Channel 297C1 at Kemmerer. SUPPLEMENTARY INFORMATION: have noted A. culveri in portions of VerDate Aug<2,>2002 15:21 Aug 13, 2002 Jkt 197001 PO 00000 Frm 00039 Fmt 4700 Sfmt 4700 E:\FR\FM\14AUR1.SGM pfrm17 PsN: 14AUR1 52880 Federal Register / Vol. 67, No. 157 / Wednesday, August 14, 2002 / Rules and Regulations Tumbling Creek where bat guano associated with at least three, and any other sites (David Ashley, in litt. occurs. Greenlee (1974) noted that the possibly as many as six, species that are November 2001). The fact that no species appears to prefer areas of the new to science but have not yet been additional populations were found in stream that lack silt, but Ashley (2000) formally described: a millipede springs in close proximity to Tumbling found no significant differences in snail (Chaetaspis sp.), a terrestrial isopod Creek Cave supports the long-held populations between habitats having silt (Caucasonethes sp.), an amphipod contention that Tumbling Creek cave is and those lacking silt. There is (Stygobromus sp.), a dipluran the only location where this species insufficient data currently available to (Plusiocampa sp.), a phalangodid occurs. determine if silt is detrimental to the harvestman (Phalangium sp.), and a Antrobia culveri was historically Tumbling Creek cavesnail. Tom and cave spider (Islandiana sp.). Tumbling known from an estimated area of 1,016 Cathy Aley suggested (pers. comm., Creek Cave also provides habitat for a square meters (m2) (10,900 square feet August 30, 2001) that silt deposition in large maternity colony of federally listed (ft2) or 0.25 acres) of Tumbling Creek recent years in the stream has gray bats (Myotis grisescens), with a along approximately 229 meters (m) ‘‘cemented’’ smaller rocks to the stream recent estimated breeding population of (750 feet (ft)) of the stream in the middle bottom making their undersurface 12,400 in 1998 (Dr. William Elliott, one-third of the lower stream passage in unavailable to cavesnails. This MDC, in litt. October 9, 2001). Tumbling Creek Cave (Greenlee 1974). hypothesis is supported by observations Historically, the gray bat breeding Based on a survey of approximately 630 made by researchers while conducting population included an estimated m2 (6,800 ft2) of suitable habitat within cavesnail surveys (e.g., Ashley and 50,000 individuals (MDC 1992, Missouri the 457 m (1,500 ft) of human-accessible McKenzie, pers. obs.). Natural Heritage Program 2000). The cave-stream habitat, Greenlee (1974) Although little is known regarding the Gray Bat Recovery Plan lists Tumbling estimated the population of Tumbling biology of this cavesnail, Greenlee Creek Cave as a ‘‘Priority 1’’ cave. Creek cavesnails at 15,118 individuals. (1974) postulated that the species feeds Priority 1 gray bat caves have the In 1995, we reviewed the status of the on aquatic microfauna. Because highest level of biological significance species, including the survey Tumbling Creek cavesnails have been for a gray bat maternity site (i.e., a cave methodology originally established by concentrated in sections of Tumbling deemed to be ‘‘absolutely essential’’ in Greenlee (1974), and determined that an Creek Cave that are usually adjacent to preventing the extinction of the inadequate description of the survey large deposits of bat guano, it has been endangered gray bat) (U.S. Fish and methods made it difficult to determine postulated that Antrobia culveri is Wildlife Service 1982).
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