Description of Mediomastus opertaculeus sp. nov. (Annelida: Capitellidae) from Hokkaido, Northern Japan

Tomioka, Shinri; Hiruta, Shimpei F.; Kajihara, Hiroshi

doi:10.12782/sd.18.1.105

Cited by 8 publications

(11 citation statements)

References 12 publications

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“…Photographs were taken with a D5200 digital camera (Nikon) attached to the SMZ 1500 and BX51 by NYPIXS2-3166, HY1S-FA, and NY1S-1501750 adapters (Micronet, Japan), with external lighting by a pair of Hikaru Komachi Di strobes (Morris, Japan). Morphological observations including methyl-green staining were performed as described by Tomioka et al (2013). Morphological terminology follows Blake et al (2009).…”

Section: Morphological Observationsmentioning

confidence: 99%

“…Based on the sequence of Capitella sp. from Mombetsu, a pair of specific primers were designed, Capitella_COI_F (5′-GGAATTTGAGGTGGGCTTGT-3′) and Capitella_COI_R (5′-CAC-CACCACCAGTATTATCA-3′), using Primer3Plus (Rozen and Skaletsky, 2000); this primer set was used for PCR amplification Tomioka et al (2013) and sequencing for specimens from Gamo and Ainan. PCRs were performed using an iCycler thermal cycler (BioRad, USA) in 10-μl reaction volumes containing 1 μl of total DNA template, 1 μl of 10× Ex Taq buffer (TaKaRa Bio, Japan), 25 mM of each dNTP, 10 μM of each primer, and 2.5 U of TaKaRa Ex Taq DNA polymerase (5 U/μl; TaKaRa Bio) in deionized water.…”

Section: Dna Extraction Pcr and Sequencingmentioning

confidence: 99%

“…Mediomastus opertaculeus Tomioka et al, 2013 (GenBank accession no. AB794988); 23 sequences in GenBank that showed identity scores greater than 80% in BLAST searches (Altschul et al, 1997) using the sequences from Gamo and Ainan specimens [eight of the 23 sequences-JX676137, JX676150, JX676169, JX676171, JX676173, JX676174, JX676178, and JX676179-appeared to be derived from gut contents of the spotted catfish, Arius maculatus (Thunberg, 1792) in India ]; and C. teleta from the Genome Portal of the Department of Energy Joint Genome Institute (http://genome.jgi.doe.gov/; deposited as Capitella sp.…”

Section: Phylogenetic Tree Construction and Species Delimitation Analmentioning

confidence: 99%

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Cosmopolitan or Cryptic Species? A Case Study ofCapitella teleta(Annelida: Capitellidae)

et al. 2016

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Capitella teleta Blake et al., 2009 is an opportunistic capitellid originally described from Massachusetts (USA), but also reported from the Mediterranean, NW Atlantic, and North Pacific, including Japan. This putatively wide distribution had not been tested with DNA sequence data; intraspecific variation in morphological characters diagnostic for the species had not been assessed with specimens from non-type localities, and the species status of the Japanese population(s) was uncertain. We examined the morphology and mitochondrial COI (cytochrome c oxidase subunit I) gene sequences of Capitella specimens from two localities (Ainan and Gamo) in Japan. Specimens from Ainan and Gamo differed from C. teleta from Massachusetts in methyl-green staining pattern, shape of the genital spines, and shape of the capillary chaetae; we concluded that these characters vary intraspecifically. Species delimitation analyses of COI sequences suggested that worms from Ainan and Massachusetts represent C. teleta; these populations share a COI haplotype. The specimens from Gamo may represent a distinct species and comprise a sister group to C. teleta s. str.; we refer to the Gamo population as Capitella aff. teleta. The average Kimura 2-parameter (K2P) distance between C. teleta s. str. and C. aff. teleta was 3.7%. The COI data indicate that C. teleta actually occurs in both the NW Atlantic and NW Pacific. Given the short planktonic larval duration of C. teleta, this broad distribution may have resulted from anthropogenic dispersal.

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Section: Morphological Observationsmentioning

confidence: 99%

Section: Dna Extraction Pcr and Sequencingmentioning

confidence: 99%

Section: Phylogenetic Tree Construction and Species Delimitation Analmentioning

confidence: 99%

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Cosmopolitan or Cryptic Species? A Case Study ofCapitella teleta(Annelida: Capitellidae)

et al. 2016

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“…The methods for morphological observation (stereoscopic, compound light, and scanning electron microscopy) and methyl-green staining were as described by Tomioka et al (2013Tomioka et al ( , 2016. Morphological terminology herein follows the usage of Green (2002).…”

Section: Methodsmentioning

confidence: 99%

Description of <i>Mastobranchus uru</i> sp. nov. (Annelida: Capitellidae) from Iriomote Island, Japan

2017

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“…While all capitellids are similar in external morphology, they have successfully colonized diverse environments. Although most species inhabit bottom substrata such as polluted sediments (e.g., Tsutsumi, 1987;Ahn et al, 1995;Méndez et al, 2001;Dean, 2008;Croquer et al, 2016), sandy beaches (e.g., Delgado et al, 2003;Incera et al, 2006;Papageorgiou et al, 2006;García-Garza and De León-González, 2011;Tomioka et al, 2012), and seagrass beds (e.g., Nakaoka et al, 2002;Omena and Creed, 2004;Eklöf et al, 2005;Tanner, 2005;Tomioka et al, 2013), some dwell among squid egg masses (e.g., Hartman, 1947), or burrow into molluscan shells (Blake, 1969) or whale bones (e.g., Fujiwara et al, 2007;Amon et al, 2013;Silva et al, 2016;Sumida et al, 2016). Capitellidae is one of the few metazoan groups where some species exhibit poecilogony (e.g., Chia et al, 1996;Tsutsumi, 2005), or polymorphism in larval development, which has been reported only in some other polychaete groups (e.g., cirratulids, Petersen, 1999;spionids, David et al, 2014) and gastropod molluscs (e.g., Vedetti et al, 2012;McDonald et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Molecular Phylogeny of the Family Capitellidae (Annelida)

Tomioka¹,

Kakui

Kajihara

2018

Zoological Science

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Capitellids have emerged as monophyletic in most but not all recent molecular phylogenies, indicating that more extensive taxon sampling is necessary. In addition, monophyly of most or all capitellid genera was questionable, as some diagnostic characters vary ontogenetically within individuals. We tested the monophyly of Capitellidae and eight capitellid genera using phylogenetic analyses of combined 18S, 28S, H3, and COI gene sequences from 36 putative capitellid species. In our trees, Capitellidae formed a monophyletic sister group to Echiura, and Capitella was also monophyletic, separated by a long branch from other capitellids. Well-supported clades each containing representatives of different genera, or containing a subset of species within a genus, indicated that Barantolla, Heteromastus, and Notomastus are likely not monophyletic. We mapped three morphological characters traditionally used to define capitellid genera (head width relative to width of first segment, number of thoracic segments, and number of segments with capillary chaetae) onto our tree. While Capitella showed unique character states, states in the other genera were decidedly not phylogenetically informative. Morphology-based capitellid taxonomy will require a fine-scale reevaluation of character states and detection of new characters.

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Description of Mediomastus opertaculeus sp. nov. (Annelida: Capitellidae) from Hokkaido, Northern Japan

Cited by 8 publications

References 12 publications

Cosmopolitan or Cryptic Species? A Case Study ofCapitella teleta(Annelida: Capitellidae)

Cosmopolitan or Cryptic Species? A Case Study ofCapitella teleta(Annelida: Capitellidae)

Description of <i>Mastobranchus uru</i> sp. nov. (Annelida: Capitellidae) from Iriomote Island, Japan

Molecular Phylogeny of the Family Capitellidae (Annelida)

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