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- Lepidurus_packardi abstract "Lepidurus packardi is a rare species of tadpole shrimp known by the common name vernal pool tadpole shrimp. It is native to California and southern Oregon, where it lives in an endangered type of habitat, the vernal pool, and other freshwater aquatic habitats. It is a federally listed endangered species of the United States.This crustacean is about 5 centimeters (2.0 in) long. It has a shield-like carapace up to 3.5 cm (1.4 in) long. It has compound eyes, up to 48 pairs of phyllopods (swimming appendages), and two cercopods, pincer-like appendages at the end of its telson, or tail segment. It is similar to, but distinct from, the related species Lepidurus couesii. The sexes can be distinguished by noting the egg sacs attached to the eleventh phyllopods of the female.L. packardi lives in vernal pools, ponds, reservoirs, ditches, road ruts, and other natural and artificial temporary water bodies. The adult is omnivorous, collecting food items with its phyllopods as it swims, climbs on vegetation, or digs in sediment. It is an ecosystem engineer in that it causes bioturbation, producing so much turbidity when it digs through the sediment that it may alter the ecology of its pool habitat by reducing plant cover.Reproduction occurs when temporary pools fill with water. Larger females have higher fecundity, the clutch size ranging from eight to 61 eggs. The eggs can withstand a period of desiccation when the pool is dry; they will then hatch within three weeks of the pool refilling, often much more quickly. Desiccation is not required for hatching, however. The larva hatches as a metanauplius. It undergoes ecdysis, or molting, several times, growing more phyllopods each time. L. packardi takes about 38 days to mature, reproduces around its 54th day of life, and lives about 144 days. It is sexually mature when it is 10–12 mm (0.4–0.5 in) in carapace length. Fecundity is much reduced in individuals which are infested with a parasitic echinostome fluke.L. packardi is found in several regions of California, including the Central Coast, Sacramento Valley, San Joaquin Valley, and southern Sierra Nevada foothills. The southeastern Sacramento Valley contains about 15% of the remaining vernal pool grassland habitat in the state, and it has about 35% of the known occurrences of L. packardi. 28% of all occurrences are in Sacramento County, California. Other areas with occurrences include the Don Edwards San Francisco Bay National Wildlife Refuge, several preserves in Tehama County, and the vicinity of the cities of Chico, Redding, and Red Bluff. It has been noted at the Sacramento National Wildlife Refuge, Travis Air Force Base, and the Jepson Prairie Preserve. In the San Joaquin Valley it has been noted at the Merced and San Luis National Wildlife Refuges. There are occurrences in the Sierra foothills region in Tulare, Fresno, Merced, and Stanislaus Counties. It occurs outside California in the Agate Desert of Oregon.Threats to L. packardi include anything that destroys, degrades, or fragments its ephemeral pool habitat. Nine percent of historical vernal pool habitat remains today, and it is fragmented and isolated. Expanding urban development is the cause of habitat destruction in many areas. Agricultural development is another cause. The construction of the University of California, Merced, campus was scheduled to alter the habitat in the area, but it also included plans for protection of over 20,000 acres (8,100 ha). Habitat can also be degraded when the local hydrology is altered, making the land too dry or permanently wet. There are many local conservation projects tailored to the needs of each region.".
- Lepidurus_packardi class Branchiopoda.
- Lepidurus_packardi conservationStatus "EN".
- Lepidurus_packardi conservationStatusSystem "iucn2.3".
- Lepidurus_packardi family Notostraca.
- Lepidurus_packardi genus Lepidurus.
- Lepidurus_packardi kingdom Animal.
- Lepidurus_packardi order Notostraca.
- Lepidurus_packardi phylum Arthropod.
- Lepidurus_packardi phylum Crustacean.
- Lepidurus_packardi thumbnail Lepidurus_packardi.jpeg?width=300.
- Lepidurus_packardi wikiPageExternalLink img_query?where-taxon=Lepidurus+packardi.
- Lepidurus_packardi wikiPageID "12703018".
- Lepidurus_packardi wikiPageLength "6744".
- Lepidurus_packardi wikiPageOutDegree "59".
- Lepidurus_packardi wikiPageRevisionID "652125930".
- Lepidurus_packardi wikiPageWikiLink Agate_Desert.
- Lepidurus_packardi wikiPageWikiLink Animal.
- Lepidurus_packardi wikiPageWikiLink Arthropod.
- Lepidurus_packardi wikiPageWikiLink Bioturbation.
- Lepidurus_packardi wikiPageWikiLink Branchiopoda.
- Lepidurus_packardi wikiPageWikiLink California.
- Lepidurus_packardi wikiPageWikiLink Carapace.
- Lepidurus_packardi wikiPageWikiLink Category:Animals_described_in_1886.
- Lepidurus_packardi wikiPageWikiLink Category:Branchiopoda.
- Lepidurus_packardi wikiPageWikiLink Category:Crustaceans_of_the_United_States.
- Lepidurus_packardi wikiPageWikiLink Category:Fauna_of_California.
- Lepidurus_packardi wikiPageWikiLink Category:Freshwater_crustaceans_of_North_America.
- Lepidurus_packardi wikiPageWikiLink Category:Natural_history_of_Oregon.
- Lepidurus_packardi wikiPageWikiLink Central_Coast_(California).
- Lepidurus_packardi wikiPageWikiLink Chico,_California.
- Lepidurus_packardi wikiPageWikiLink Clutch_(eggs).
- Lepidurus_packardi wikiPageWikiLink Crustacean.
- Lepidurus_packardi wikiPageWikiLink Crustacean_larvae.
- Lepidurus_packardi wikiPageWikiLink Don_Edwards_San_Francisco_Bay_National_Wildlife_Refuge.
- Lepidurus_packardi wikiPageWikiLink Ecdysis.
- Lepidurus_packardi wikiPageWikiLink Echinostoma.
- Lepidurus_packardi wikiPageWikiLink Ecology.
- Lepidurus_packardi wikiPageWikiLink Ecosystem_engineer.
- Lepidurus_packardi wikiPageWikiLink Endangered_species.
- Lepidurus_packardi wikiPageWikiLink Eye.
- Lepidurus_packardi wikiPageWikiLink Fecundity.
- Lepidurus_packardi wikiPageWikiLink Fresno_County,_California.
- Lepidurus_packardi wikiPageWikiLink Grassland.
- Lepidurus_packardi wikiPageWikiLink Habitat_fragmentation.
- Lepidurus_packardi wikiPageWikiLink Hydrology.
- Lepidurus_packardi wikiPageWikiLink Lepidurus.
- Lepidurus_packardi wikiPageWikiLink Lepidurus_couesii.
- Lepidurus_packardi wikiPageWikiLink Merced_County,_California.
- Lepidurus_packardi wikiPageWikiLink Merced_National_Wildlife_Refuge.
- Lepidurus_packardi wikiPageWikiLink Metanauplius.
- Lepidurus_packardi wikiPageWikiLink Notostraca.
- Lepidurus_packardi wikiPageWikiLink Omnivore.
- Lepidurus_packardi wikiPageWikiLink Oregon.
- Lepidurus_packardi wikiPageWikiLink Parasitism.
- Lepidurus_packardi wikiPageWikiLink Red_Bluff,_California.
- Lepidurus_packardi wikiPageWikiLink Redding,_California.
- Lepidurus_packardi wikiPageWikiLink Sacramento_County,_California.
- Lepidurus_packardi wikiPageWikiLink Sacramento_National_Wildlife_Refuge_Complex.
- Lepidurus_packardi wikiPageWikiLink Sacramento_Valley.
- Lepidurus_packardi wikiPageWikiLink San_Joaquin_Valley.
- Lepidurus_packardi wikiPageWikiLink San_Luis_National_Wildlife_Refuge.
- Lepidurus_packardi wikiPageWikiLink Sierra_Nevada_(U.S.).
- Lepidurus_packardi wikiPageWikiLink Stanislaus_County,_California.
- Lepidurus_packardi wikiPageWikiLink Tehama_County,_California.
- Lepidurus_packardi wikiPageWikiLink Telson.
- Lepidurus_packardi wikiPageWikiLink Travis_Air_Force_Base.
- Lepidurus_packardi wikiPageWikiLink Trematoda.
- Lepidurus_packardi wikiPageWikiLink Tulare_County,_California.
- Lepidurus_packardi wikiPageWikiLink Turbidity.
- Lepidurus_packardi wikiPageWikiLink University_of_California,_Merced.
- Lepidurus_packardi wikiPageWikiLink Vernal_pool.
- Lepidurus_packardi wikiPageWikiLinkText "Lepidurus packardi".
- Lepidurus_packardi wikiPageWikiLinkText "San Joaquin tadpole shrimp ''(Lepidurus packardi)''".
- Lepidurus_packardi binomial "Lepidurus packardi".
- Lepidurus_packardi binomialAuthority "Simon, 1886".
- Lepidurus_packardi classis Branchiopoda.
- Lepidurus_packardi familia Notostraca.
- Lepidurus_packardi genus "Lepidurus".
- Lepidurus_packardi name "Lepidurus packardi".
- Lepidurus_packardi ordo Notostraca.
- Lepidurus_packardi phylum "Arthropoda".
- Lepidurus_packardi regnum "Animalia".
- Lepidurus_packardi species "L. packardi".
- Lepidurus_packardi status "EN".
- Lepidurus_packardi statusSystem "iucn2.3".
- Lepidurus_packardi subphylum Crustacean.
- Lepidurus_packardi wikiPageUsesTemplate Template:Convert.
- Lepidurus_packardi wikiPageUsesTemplate Template:Italic_title.
- Lepidurus_packardi wikiPageUsesTemplate Template:Portal.
- Lepidurus_packardi wikiPageUsesTemplate Template:Reflist.
- Lepidurus_packardi wikiPageUsesTemplate Template:Taxobox.
- Lepidurus_packardi subject Category:Animals_described_in_1886.
- Lepidurus_packardi subject Category:Branchiopoda.
- Lepidurus_packardi subject Category:Crustaceans_of_the_United_States.
- Lepidurus_packardi subject Category:Fauna_of_California.
- Lepidurus_packardi subject Category:Freshwater_crustaceans_of_North_America.
- Lepidurus_packardi subject Category:Natural_history_of_Oregon.
- Lepidurus_packardi hypernym Species.
- Lepidurus_packardi type Animal.