Graceful clam shrimp

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Lynceus gracilicornis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Branchiopoda
Order: Laevicaudata
Family: Lynceidae
Genus: Lynceus
Species: L. gracilicornis
Binomial name
Lynceus gracilicornis
(Packard, 1871)

Limnetis gracilicornis Packard, 1871

The graceful clam shrimp (Lynceus gracilicornis) is a species of clam shrimp found in Texas, northern Florida and possibly other regions in between.[1]


This large clam shrimp presents a body colouration varying from orange to rose, and a dark maroon shell; the eggs carried by the female are yellow to orange.[1] The species is distinguished from other Lynceidae members because the males have a pair of large claspers, with the right clasper being larger than the left. There are no growth marks on the carapace, as in other clam shrimp.[1] Graceful clam shrimp swim upside down or on their side, using legs and antennae for backward propulsion.[1]


L. gracilicornis is usually found in the shallow grassy parts of temporary ponds.[1] When oxygen levels are high, some individuals may be found in deep water. Graceful clam shrimp feed on plankton that they collect while swimming.[1]


The male clasps the lower margin of the female's shell and swims while holding her above him. Females carry up to 200 eggs under the carapace.[1]