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DOI/FWS RIN: 1018-BI17 Publication ID: Spring 2025 
Title: Endangered and Threatened Wildlife and Plants; Listing Determination for 1 Species and Critical Habitat Designation for 24 Species on the Mariana Islands and Guam 
Abstract:

FWS will make a listing determination for the Rota tree snail (Partula lutaensis) under the Endangered Species Act. FWS will also, if prudent and determinable, propose to designate critical habitat under the Act for the following animal and plant species found in the Commonwealth of the Mariana Islands and Territory of Guam: MAMMAL: Pacific sheath-tailed bat (Emballonura semicaudata rotensis); AMPHIBIAN: Slevin’s skink (Emoia slevini); SNAILS: fragile tree snail (Samoana fragilis), Guam tree snail (Partula radiolata), humped tree snail (Partula gibba), Langford’s tree snail (Partula langfordi), and Rota tree snail (Partula lutaensis); INSECTS: Mariana eight-spot butterfly (Hypolimnas octocula marianensis), Mariana wandering butterfly (Vagrans egistina), and Rota blue damselfly (Ischnura luta); PLANTS: Bulbophyllum guamense, Cycas micronesica, Dendrobium guamense, Eugenia bryanii, Hedyotis megalantha, Heritiera longipetiolata, Maesa walkeri, Nervilia jacksoniae, Phyllanthus saffordii, Psychotria malaspinae, Solanum guamense, Tabernaemontana rotensis, Tinospora homosepala, and Tuberolabium guamense. 

 
Agency: Department of the Interior(DOI)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 14192 Designation: Regulatory 
CFR Citation: 50 CFR 17   
Legal Authority: 16 U.S.C. 1531 et seq.   
Legal Deadline:
Action Source Description Date
NPRM  Judicial  Settlement Agreement  06/26/2025 
Final  Judicial    06/26/2026 
Timetable:
Action Date FR Cite
NPRM  07/00/2025 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Caitlin Snyder
Branch of Domestic Listing, Ecological Services Program
Department of the Interior
United States Fish and Wildlife Service
5275 Leesburg Pike, MS: ES,
Falls Church, VA 22041-3803
Phone:703 358-2673
Fax:703 358-1800
Email: caitlin_snyder@fws.gov