title: Freshwater shrimp-sponge association from an ancient lake.
abstract: Shrimp-sponge associations occur frequently in marine ecosystems, serving as model systems for the evolution of eusociality. Here, we describe the first known instance of such association in freshwater from an ancient lake in Indonesia. The shrimp Caridina spongicola forms an exclusive and probably commensal association with a yet undescribed spongillinid sponge. Phylogenetic and ecological data suggest a comparatively recent origin of both taxa. Climatic fluctuations may have facilitated speciation and occasional hybridization of the shrimp species, which is derived from a rock-dwelling ancestor. Their extremely localized occurrence in an increasingly disturbed area makes both taxa a conservation priority.
authors.affiliation: Museum of Natural History, Humboldt University, Invalidenstrasse 43, 10115 Berlin, Germany. kristina.rintelen@museum.hu-berlin.de
authors.forename: Kristina von
authors.initials: Kv
authors.lastname: Rintelen
authors.forename: Thomas von
authors.initials: Tv
authors.lastname: Rintelen
authors.forename: Martin
authors.initials: M
authors.lastname: Meixner
authors.forename: Carsten
authors.initials: C
authors.lastname: Lüter
authors.forename: Yixiong
authors.initials: Y
authors.lastname: Cai
authors.forename: Matthias
authors.initials: M
authors.lastname: Glaubrecht
mesh_terms: D000818:Animals; D001483:Base Sequence; D001499:Bayes Theorem; D017931:DNA Primers; D004272:DNA, Mitochondrial / Q000235:genetics; D005618:Fresh Water; D007214:Indonesia; D008957:Models, Genetic; D008969:Molecular Sequence Data; D033541:Palaemonidae / Q000235:genetics* / Q000502:physiology; D010802:Phylogeny; D011161:Porifera / Q000033:anatomy & histology / Q000235:genetics* / Q000502:physiology; D017422:Sequence Analysis, DNA; D013559:Symbiosis
chemical_list: D017931:DNA Primers; D004272:DNA, Mitochondrial