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And Number 519-69-01-A (June 1, 1931 to June 30, 1932)

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And Number 519-69-01-A (June 1, 1931 to June 30, 1932) JOB DESCRIPTION FINAL REPORT State: New Mexico Project Number: E-1-3 Project Title: Endangered Species Study Title: Status Investigation of Mollusks Job No. 1 Program Narrative Objective No. 1 Contract Period: From: January 15, 1981 To: June 30, 1983 ( Amended) ABSTRACT A survey of the status of the living freshwater mollusks of New Mexico was done, using data from the literature, specimens, and field investigations. Fifty-one species of these mollusks in 10 families and two classes were recorded from the state, with all but three species being native. Of the native species,20 are so rare, local, or otherwise vulnerable that they could be considered as candidates for listing as state-endangered. Of these 20 species, six are so rare, local or otherwise vulnerable as to be possible candidates for federal listing as endangered or threatened--and five are endemic to New Mexico. REPORT CONTENT 1. Objective: a. To determine and report the status Of freshwater mollusks that may be endangered or threatened in New Mexico and to make recommendations on their conservation. I I. Background: The freshwater molluscan fauna of New Mexico has been subject to scientific i nquiry since the 19th century. However, no largescale, sy-stematic effort has been expended toward summarizing the status of this fauna, particularly from the point of view of species that may be endangered or threatened in the state. In view of the fact that mollusks are among the taxa which the New Mexico Department of Game and Fish is directed to conserve under the Wildlife Conservation Act (Chapter 17-2-33 through 17-2-46, Nt1SA 1973), a need has existed to gather data on the status of such animals in the state. Because of this need--as well as because of increasing threats to aquatic habitats in New Mexico an8 the potential loss of mollusks as a result--the present project was undertaken. III. Procedures: The bulk of this project was accomplished under a professional service contract between the Department of Game and Fish and Dr. Delight W. Taylor of San Francisco State University, Tiburon, California. Two contracts were effected, Number 519 - 69-01 (January 15, 1931 to June 30, 1931) and number 519-69-01-A (June 1, 1931 to June 30, 1932). The final report from Dr. Taylor was due June 30, 1982, but this JD-2 date was verbally extended to early 1983 to allow for more complete analysis and • reporting. The combined contracts provided for the following: 1. Compilation of a list of freshwater mollusks living in New Mexi co, incl uding those species that are potential candidates for federal and/or state listing as endangered or threatened, as defined under the Endangered Species Act (1973 and amendments) and/or the Wildlife Conservation Act (1974). 2. Preparation for publication of descriptions necessary for naming of any undescribed species that may be candidates for listing. 3. Provision of information relevant to the conservation of potential ly listable species. 4. Final report by candidate species, giving a. scientific and common names. b. range overall and in New Mexico. c. relative abundance (New Mexico). d. habitat requirements (New Mexico). e. threats to survival (New Mexico). f. management recommendations (New Mexico). g. general description and taxonomic relationships. h. appropriate illustrations. I. other relevant information. These items (1-4, above) were to be determined from appropriate fieldwork in New Mexico, specimen study, literature review, and related sources. Duplicate specimens of each treated species were to be provided to the Department of Game and Fish, along with copies of field sheets and other relevant written work notes. Fieldwork conducted by Dr. Taylor in New Mexico and under this contract was done in April-May and September- October 1 931. The following are among the localities visited for purposes of these contracts: a. Chaves County: Bitter Lake National Wildlife Refuge:. Pecos River; Roswell Country Club. b. Cibola County: Rio San Jose; San Rafael; Zuni Mountains. c. Colfax County: Black Lake ; Cimarron River. d. Eddy County: Black River; Blue Spring; Castle Spring; Geyscr Spring; Guadalupe Mountains; Pecos River. e. Grant County: Gila River. f. McKinley County: Nutria Creek and elsewhere in the Zuni Mountains. g. Rio Arriba County: Rio Grande; San Juan Mountains. Ii. Sandoval County: Jemez Mountains i. San Juan County: San Juan River j. San Miguel County: Conchas River, including reservoirs. k. Santa Fe County: Nambe Lake; Santa Fe Lake. 1. Socorro County: Alamosa River; Socorro Spring; Torreon Spring; Willow Spring. m. Taos County: Rio Grande n. Union County: Clayton Lake; Dry Cimarron River; North Canadian Creek. I n addition, specimen collections from the following institutions were consulted by Dr. Tay lor: JD-3 a. Academy of Natural Science, Philadelphia, Pennsylvania. b. California Academy of Science, San Francisco. c. University of Colorado, Boulder. d. University of Michigan Museum of Zoology, Ann Arbor. e. University of Texas, El Paso. f. United States National Museum of Natural History, Washington. Personnel from the New Mexico Department of Game and Fish participated in mollusk- col lecting and related to activities to a limited extent. The results of their efforts were incorporated into Dr. Taylor's findings. I V. Findings: Some 51 species of living freshwater mollusks were documented as occurring in New Mexico, with 4G of these being native and three introduced (latter marked by I, below). Of these 51 species, four appear to have been extirpated in New Mexico (marked by X) and one other may be extinct (marked by Z). Finally, 29 of the 48 native species are regarded as sufficiently rare, local, or otherwise vulnerable to be potentially endangered or threatened (E). In these 29 species, three distributional categories are recognized: endemic to Hew Mexico (NM), narrowly distributed, but not endemic (ND), and widespread but peripheral in New Mexico (P). A. Class GASTROPODA 1. Assiminea species (a)--E(ND) II. Fami ly Hydrobi i dae 2. Fontelicella neomexicana (Pilsbry)--E(NM) 3. Fontelicella species (a)--E(NM) 4. Fontelicella species (b)--E(NM) 5. Fontelicella species (c)--E(NM) 6. Fontelicella species (d)--E(NM) 7. Fontelicella species (e)--E(NM) III. Family Littoridinidae U. Tryonia species (a)--E(NM) 9. Tryonia species (b)--E(NM) I V. Family Lymnaeidae 10. Lymnaea caperata Say--E(P) 11. Lymnaea palustris group 12. Bakerilymnaea cubensis (Pfeiffer) 13. Bakerilymnaea techella (Haldeman) 14. Fossaria modideTITTS-30 — 15. Fossaria F.3773 (L-ea) 16. Radix auricularia (Linnaeus)--I V. Family P1 anorb i dae 17. Gyraulus circumstriatus (Tyron)--E(P) 13. Gyraulus, crista (Linnaeus)--E(P) JD-4 19. Gyraulus parvus (Say) 20. Planorbella duryi (Weatherby)--I 21. Planorbella subcrenata (Carpenter)--E(P) 22. Planorbella tenuis (Dunker) 23. Promenetus exacuous (Say)--X 24. Promenetus umbilicatellus (Cockerell)--E(P) 25. Genus and species(a)--E(NM) VI Family Ancylidae 26. Ferrissia californica (Rowell) 27. Ferrissca rivularis (Say)--E(P) VII. Family Physidae 23. Physa gyrina (Say) 29. Physa virgata (Gould) 30. Physa species (a)--2(?); E(NM) B. Class PELECYPODA VIII. Family Unionidae 31. Anodonta imbecillis (Say)--E(P) 32. Cyrtonaias berlandieri (Lea)--X 33. Popenaias popei (Lea)--E(ND) 34. Uniomerus tetralasmus (Say)--X I V. Family Corbiculidae 35. Corbicula fluminea X. Family Sphaeriidae 36. Sphaerium striatinum (Lamarck)--E(P 37. Musculium TEcTriN3WIT-( Cooper)--E(P) 30. Musculium partumeium (Say)--E(P) 39. Musculium transversum (Say)--E(P) 40. Musculium truncatum (Gould)--E(P) 41. Pisidium casertanum (Poll) 42. Pisidium opmpressum Prime 43. Pisidium contortum Prime 44. Pisidium insigne Gabb 45. Pisidium lilljeborgi Clessin--E(P) 46. Pisidium pauperculum Sterki--X 47. Pisidium milium Held--E(P) 46. Pisidium singleyi Sterki--E(P) 49. Pisidium variabile Prime 50. Pisidium ventricosum Prime 51. Pisidium species (a)--E(NM) Of the 51 species of freshwater mollusks recorded from New Mexico, ten appear to be undescribed species and one other is an apparent new genus. JD-5 The allocation of these new taxa is as follows: a. Family Assimineidae: one new species in the genus Ass iminea. b. Family Hy drob i idae: five new species in the genus Fonteli ce 1 I a. c. Family Li ttori di nidae: two new species in the genus Tryon i a. d. Family Planorbidae: one new genus and species. e. Family Physidae: one new species in the genus Physa. f. Family Sphaeriidae: one new species in the genus Pisidium. Dr. Taylor is in the process of describing these new taxa, and reprints of the descriptions and/or references to them will be avai lab le when they are published. In regard to the 29 species of mollusks recommended by Dr. Taylor as potentially endangered or threatened, 16 of these are relatively wide- ranging forms that are peripheral in New Mexico and 13 others are more narrowly distributed. Among the peripheral species, all but one are northern and/or eastern species that reach southern and/or western limits in New Mexico, i.e. Lymnaea caperata, Gyraulus spp. (2 species), Planorbel la subcrenata, Promenetus umbi 1 i catellus , Fe r ri ss i a ri vulari s , Anodonta i mbecillis, Sphaerium striatinum, Musculium spp. (4 species), and Pisidium spp. (3 species). One other species, Pisidium singleyi, is a southern species at i ts northern limits in New Mexico. Interestingly, of the four extirpated species, three are northern and/or eastern species that were at southern and/or western limits in the state: Promenetus exacuous, Uniomerus tetralasms, and Pisidium pauperculum. Cyrtonaias berlandieri is largely a Texas species, ranging narrowly into adjacent Mexico and at least formerly New Mexico. Of the 13 more narrowly distributed species, eleven are endemic to New Mexico, i.e. Fontelicel la spp. (6 species), Tryonia spp. (2 species), Physa sp.
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