Clibanarius vittatus

(Bosc, 1802)

Thinstripe Hermit Crab, Striped-legged Hermit Crab

Clibanarius vittatus is a marine hermit crab in the Diogenidae, commonly known as the thinstripe or striped-legged hermit crab. It inhabits shallow coastal waters of the western Atlantic Ocean, including the Caribbean Sea and Gulf of Mexico. The exhibits distinctive longitudinal stripes on its legs and occupies empty gastropod shells for protection. Research has documented complex behaviors including sex-specific shell switching patterns during , risk-sensitive responses to threats, and size-dependent aggressive interactions.

Clibanarius vittatus by (c) Laura Clark, some rights reserved (CC BY), uploaded by Laura Clark. Used under a CC-BY license.

Clibanarius vittatus-dorsal by Peterwchen. Used under a CC BY-SA 4.0 license.

Clibanarius vittatus (I0905) (14990150913) by Smithsonian Environmental Research Center. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Clibanarius vittatus: /ˌklɪb.əˈnɛə.ri.əs ˈvɪt.ə.təs/

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Identification

Distinguished from the Clibanarius sclopetarius by differences in , ornamentation, and coloration of eyestalks and antennal peduncle. legs display characteristic longitudinal striping pattern. Genetic divergence from C. sclopetarius ranges 4.5–5.9% for 16S rDNA and 9.4–11.9% for COI, supporting -level separation. from Brazil and Gulf of Mexico show considerable genetic differentiation that may indicate cryptic diversity.

Images

Habitat

Marine intertidal and shallow subtidal environments. Occupies empty gastropod shells, with shell adequacy influencing microhabitat selection and .

Distribution

Western Atlantic Ocean including Caribbean Sea, Gulf of Mexico, and Atlantic coast from at least Florida to Brazil. Records from Sebastian Inlet, Florida; northern Indian River Lagoon, Florida; and Mississippi barrier islands.

Life Cycle

Larval development includes planktonic stages with temporal patterns in hatching documented. is affected by shell size and coil orientation in females.

Behavior

Males increase shell switching during reproductive season to obtain larger shells that facilitate mating, despite elevated risk. Females show reduced shell switching during reproductive periods. Both sexes exhibit risk-sensitive behavior, adjusting activity levels based on perceived predation risk. Aggressive behavior is size-dependent: larger individuals are ; crabs in undersized shells show increased aggression; crabs in oversized shells show decreased aggression and are more easily displaced. Presence of empty shells reduces frequency of aggressive encounters. Courting males continue pre-copulatory behaviors when exposed to odors, though fewer pairs are established; females exposed to predator cues become unattractive to males.

Human Relevance

Used as a model organism in environmental toxicology studies, particularly for investigating effects of tributyltin (TBT) on . TBT exposure causes ovarian disorganization and in females, with potential -level impacts in harbors despite worldwide TBT ban.

Similar Taxa

Clibanarius sclopetarius western Atlantic formerly considered for synonymization; distinguished by molecular divergence (4.5–5.9% 16S, 9.4–11.9% COI), , ornamentation, and eyestalk/antennal peduncle coloration.