cryptic tadpole shrimp

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Lepidurus cryptus, or the cryptic tadpole shrimp, is a relatively small species of freshwater crustacean endemic to California and Oregon. The name "cryptus" is derived from its role as a cryptic species, being visually indistinguishable from Lepidurus packardi. Though its range is large, it remains uncommon, and is considered a vulnerable species by NatureServe.

Lepidurus es el mayor de los dos géneros de notostráceos. Contiene las especies:​ Lepidurus apus (Linnaeus, 1758) Lepidurus arcticus (Pallas, 1793) Lepidurus batesoni Longhurst, 1955 Lepidurus bilobatus Packard, 1883 Lepidurus couesii Packard, 1875 Lepidurus cryptus D. C.