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9 Endangered Species Tech. Bull. 1 (1984)

handle is hein.animal/endanspb0009 and id is 1 raw text is: January 1984 Vol. IX No. 1 m a m am w m m mm - um _ allik a m m A - m ulli -R M H W mW- W- milili -In -lili li*m g-emgig -gg m snlail III iim l m e - mu am - a- mea m .... .a- -n.. m - - -... -... -m-m- m a mmm mm - - summanume Department of interior. U.S. Fish and Wildlife Service Endangered Species Program, Washington, D.C. 20240 Review Initiated for Species Listed in 1978 In order to ensure that the U.S. List of Endangered and Threatened Wildlife and Plants reflects the true biological status of these species, the Endangered Species Act requires the Fish and Wild- life Service to conduct a review of all listed species at least once every 5 years. Accordingly, the Service has published a notice (FR. 12/8/83) announcing the initiation of a review on all plants and animals added to the list in 1978. Any information that might document the need to change the classification under the Act of any of these species is requested, and should be sent to the appropriate office by April 6, 1984 (see BULLETIN page 2 for addresses). The names of those species under current review are included in the notice. The Mona ground iguana (Cyclura stejnegeri) and Texas wild-rice (Zizania texana) are among the 21 animals and 18 plants whose listed status is now under review. Recovery Plans Approved for Five Mullusks Although mollusks are not the most famous examples of rare wildlife, there are 34 snails and clams on the U.S. List of Endangered and Threatened Species, and many more are candidates for future listing. Among the recovery plans that have been approved during 1983 for listed species are five new plans for mollusks-four snails and one clam or mussel, A brief summary of each plan follows: The Chittenango ovate amber snail (Succinea chittenangoensis) is a terres- trial mollusk known only from the imme- diate vicinity of Chittenango Falls in New York State Its common name re- fers to its habitat and to its ovate, amber colored shell. S. chittenangoensis pre- fers cool, sunlit areas of lush herba- ceous growth within the saturated spray zone of the falls, but it is found also in vegetation occurring in a nearby spring- fed area As a Pleistocene relict, S. chit- tenangoensis is able to survive within its restricted range at the falls because the paraglacial habitat has characteristics that mimic the cool, moist conditions existing thousands of years ago when the snail was more widespread, It is par- ticularly vulnerable to even subtle modi- fications in its environment, whether natural or human-related. S. chittenangoensis was said to be in great abundance in 1905 when it was first collected. Although recent surveys have not yielded a firm population esti- mate, it has apparently experienced a significant decline within its restricted habitat, In 1977, the New York Depart- continued on page 8 Adult specimens of the Chittenango ovate amber snail have shells that are gently convex, laterally compressed, and about 21 mm in length. ENDANGERED SPECIES TECHNICAL BULLETIN VOL, IX NO. 1 (1984) U.S. GOVERNMENT PRINTING OFFICE: 381-580 Digitized from Best Copy Available A N 0 N I

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