Tube-dwelling
Guides
Pinnixa chaetopterana
tube pea crab
Pinnixa chaetopterana is a small, soft-bodied pea crab that lives symbiotically within the tubes of polychaete worms, primarily Chaetopterus variopedatus. It is a facultative commensal, occasionally free-living or associating with alternative hosts such as Amphitrite ornata. The species exhibits strong host fidelity and can distinguish conspecifics from heterospecifics. It ranges from Massachusetts to Uruguay along the western Atlantic, including Brazil and the Gulf of Mexico.
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thievery-unknownaggression-contextintraspecific-aggressioninterspecific-aggressionlimb-autotomyregeneration-unknownwound-healingstress-responsehandling-responselaboratory-maintenancecollection-methodpreservation-effectmuseum-specimen-qualitytype-specimen-locationoriginal-description-qualitysubsequent-redescriptionstaxonomic-stabilitynomenclatural-actspriority-ruleshomonymy-checksynonymy-list-completenessdistribution-record-verificationoccurrence-data-qualityrange-boundary-uncertaintydepth-record-accuracyhabitat-description-specificityhost-record-verificationassociation-record-qualitysymbiosis-documentation-standardnatural-history-completenessresearch-priority-areasconservation-status-unknownIUCN-evaluation-neededpopulation-trend-unknownthreat-assessmenthabitat-vulnerabilityclimate-sensitivityrange-shift-potentialphenology-changehost-phenology-dependencyphenological-mismatch-riskevolutionary-history-unknownphylogenetic-positionsister-species-unknownspecies-group-membershipgenetic-differentiationcryptic-diversity-potentialbarcode-library-coveragegenome-resourcestranscriptome-unknownproteome-unknownmetabolome-unknowndevelopmental-genetics-unknownsymbiosis-genetics-unknownhost-recognition-gene-unknownimmune-response-unknownparasite-resistance-unknowncoevolution-historyphylogeography-unknownpopulation-structure-unknowngene-flow-unknowndispersal-limitationisolation-by-distancelocal-adaptation-unknownphenotypic-plasticitymorphological-variationenvironmental-gradient-responsephenotypic-clinegenotype-environment-interactionevolutionary-potentialadaptive-capacityresilience-unknownextinction-risk-assessment-neededPlectreurys
Plectreurys is a genus of ecribellate, haplogyne spiders in the family Plectreuridae, one of only two extant genera in this family. Species possess eight eyes—unusual among ecribellate haplogynes, which typically have six. They are nocturnal, sedentary hunters that inhabit silken tubes and rarely leave them. Males develop distinctive coupling spurs on the tibia of leg I, used during mating. The genus comprises 23 described species distributed across the southwestern United States, Mexico, Cuba, Costa Rica, and Guatemala.
Segestriidae
Tube-dwelling spiders, Tunnel spiders
Segestriidae is a family of tube-dwelling spiders comprising two large and widespread genera (Segestria and Ariadna) and two smaller genera (Citharoceps and Gippsicola). Members are easily recognized by having six eyes arranged in a semicircle (rather than the typical eight eyes of most spiders) and the first three pairs of legs arranged forward (rather than two). These morphological features appear to be adaptations for living in silken tubes or burrows. The family has a global distribution across all continents except Antarctica, with greatest diversity in tropical and subtropical regions. The genus Ariadna alone contains 102 of the 127 described species in the family.