Phylogenetic position of Antarctic Scalpelliformes (Crustacea: Cirripedia: Thoracica)

Linse, Katrin; Jackson, Jennifer A.; Fitzcharles, Elaine; Sands, Chester J.; Buckeridge, John S.

doi:10.1016/j.dsr.2012.11.006

Cited by 20 publications

(42 citation statements)

References 47 publications

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“…() and Linse et al . () based on well‐supported topological congruencies with our phylogenetic hypothesis. Fossil ages were used as lower boundary constraints assuming prior exponential distributions with mean values of 25 Myr.…”

Section: Methodssupporting

confidence: 64%

“…; Linse et al . ). Suborders belonging to the order Pedunculata (stalked or gooseneck barnacles) are indicated with (P).…”

Section: Resultsmentioning

confidence: 97%

“…These results, together with those from Linse et al . (), also suggest that vent barnacles form a monophyletic clade that probably originated in the Cretaceous; however, the possibility of a single origin remains an open question due to the paucity of taxonomic sampling in that study. Furthermore, the relationships among morphospecies of vent barnacles also remain unresolved due to the low variability of markers examined to date.…”

Section: Introductionmentioning

confidence: 79%

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Evolutionary and biogeographical patterns of barnacles from deep‐sea hydrothermal vents

2015

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The characterization of evolutionary and biogeographical patterns is of fundamental importance to identify factors driving biodiversity. Due to their widespread but discontinuous distribution, deep‐sea hydrothermal vent barnacles represent an excellent model for testing biogeographical hypotheses regarding the origin, dispersal and diversity of modern vent fauna. Here, we characterize the global genetic diversity of vent barnacles to infer their time of radiation, place of origin, mode of dispersal and diversification. Our approach was to target a suite of multiple loci in samples representing seven of the eight described genera. We also performed restriction‐site associated DNA sequencing on individuals from each species. Phylogenetic inferences and topology hypothesis tests indicate that vent barnacles have colonized deep‐sea hydrothermal vents at least twice in history. Consistent with preliminary estimates, we find a likely radiation of barnacles in vent ecosystems during the Cenozoic. Our analyses suggest that the western Pacific was the place of origin of the major vent barnacle lineage, followed by circumglobal colonization eastwards through the Southern Hemisphere during the Neogene. The inferred time of radiation rejects the classic hypotheses of antiquity of vent taxa. The timing and the mode of origin, radiation and dispersal are consistent with recent inferences made for other deep‐sea taxa, including nonvent species, and are correlated with the occurrence of major geological events and mass extinctions. Thus, we suggest that the geological processes and dispersal mechanisms discussed here can explain the current distribution patterns of many other marine taxa and have played an important role shaping deep‐sea faunal diversity. These results also constitute the critical baseline data with which to assess potential effects of anthropogenic disturbances on deep‐sea ecosystems.

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Section: Methodssupporting

confidence: 64%

“…; Linse et al . ). Suborders belonging to the order Pedunculata (stalked or gooseneck barnacles) are indicated with (P).…”

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 79%

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Evolutionary and biogeographical patterns of barnacles from deep‐sea hydrothermal vents

2015

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“…5) It is noteworthy that of the 14 genera of cirripede recorded from Iv€ o Klack, only three (Capitulum, Pollicipes and Arcoscalpellum) have any post-Cretaceous occurrences. Arcoscalpellum is now restricted to deepewater settings, and is probably paraphyletic (Linse et al, 2013), so the precise relationships of Cretaceous taxa with living ones are very uncertain. The possibility must be considered that the K-Pg boundary extinctions had a dramatic effect on cirripedes, possibly opening niches subsequently occupied by the radiating balanomorphs (Gale and Sørensen, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Numerous fossil species have been referred to this living genus, which is presently restricted to deep-sea habitats (Withers, 1935(Withers, , 1953. Recent molecular phylogenies suggest that it is paraor even polyphyletic (Linse et al, 2013;Jens Høeg, pers. comm., January 2014).…”

Section: Diagnosismentioning

confidence: 98%