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Chan B.K.K. & Chen Y.H. 2022. Distinguishing Long-Discussed Cryptic Species of the Epibiotic Goose-Neck Barnacle of the Genus Conchoderma (Thoracicalcarea: Lepadidae) with Integrative Taxonomy. Diversity 14(8): 593. DOI:10.3390/d14080593
Résumé [+]
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Naked goose neck barnacles Conchoderma can grow on a wide variety of marine organisms. The taxonomic status of two of its species—C. virgatum and C. hunteri—are currently controversial. Some studies suggest that C. hunteri is a subspecies, variety or growth forms of C. virgatum, because both have great morphological variations, but other studies consider C. hunteri and C. virgatum to be distinct species. The present study examines the morphology and sequence divergence of the COI gene in C. virgatum, C. hunteri and other closely related species. There are consistent morphological differences between C. virgatum and C. hunteri in the tergum, carina and fifth teeth of the mandible. Phylogenetic analysis based on the divergence in the COI gene revealed that C. virgatum and C. hunteri form sister clades with high bootstrap values. The K2P distances within C. hunteri and C. virgatum are 0.034 ± 0.008 and 0.002 ± 0.001 for the COI sequences, respectively. The K2P distance between C. hunteri and C. virgatum is 0.097 ± 0.016. Morphological and molecular evidence confirm that C. hunteri is a valid species.
Campagnes accessibles citées (1) [+]
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Codes des collections associés:
IU (Crustacés)
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Kim S.J., Kang H.M., Corbari L. & Chan B.K.K. 2018. First report on the complete mitochondrial genome of the deep-water scalpellid barnacle Arcoscalpellum epeeum (Cirripedia, Thoracica, Scalpellidae). Mitochondrial DNA Part B 3(2): 1288-1289. DOI:10.1080/23802359.2018.1532844
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Scalpellids are one of the largest families of Scalpelliformes and reproduce either androdioeciously or dioeciously. Here, we characterized the first mitogenome of a scalpellid barnacle (Arcoscalpellum epeeum), which was 15,593 bp in length with a 71.5% AT content. In comparison with the pollicipedids Capitulum mitella and Pollicipes polymerus, the tRNA genes of A. epeeum were rearranged between ND3 and ND5, between CYTB and ND1, and between 12S rRNA and ND2. On the mitogenomic tree, the Scalpelliformes families Pollicipedidae and Scalpellidae were not monophyletic, which concurs with previous studies.
Campagnes accessibles citées (1) [+]
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Codes des collections associés:
IU (Crustacés)
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Ma K.Y., Chow L.H., Wong K.J.H., Chen H.N., Ip B.H.Y., Schubart C.D., Tsang L.M., Chan B.K.K. & Chu K.H. 2018. Speciation pattern of the horned ghost crab Ocypode ceratophthalmus (Pallas, 1772): An evaluation of the drivers of Indo-Pacific marine biodiversity using a widely distributed species. Journal of Biogeography 45(12): 2658-2668. DOI:10.1111/jbi.13443
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Aim: The high species richness of the Indo‐Australian Archipelago (IAA) marine biodiversity hotspot has been attributed to three competing hypotheses: Centre of Origin/Centre of Overlap/Centre of Accumulation. While most phylogeographic studies testing these hypotheses have focused on marine fishes, we provide a new perspective on this evolutionary important question by examining the population genetics of the horned ghost crab Ocypode ceratophthalmus sensu lato (Ocypodidae) whose distribution spans the entire Indo‐Pacific and contains at least two colour morphs.
Campagnes accessibles citées (3) [+]
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Codes des collections associés:
IU (Crustacés)