A new species of Chaetopterus (Annelida, Chaetopteridae) from Hong Kong

Sun, Yanan; Qiu, Jian‐Wen

doi:10.24199/j.mmv.2014.71.23

Cited by 8 publications

(4 citation statements)

References 8 publications

(13 reference statements)

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“…As is the case for C. appendiculatus , some of these species have not yet been formally redescribed. However, as many as nine species have recently been described, and five have been redescribed in the recent literature ( Nishi, 2001 ; Nishi, Arai & Sasanuma , 2000 ; Nishi, Hickman Jr & Bailey-Brock, 2009 ; Osborn et al, 2007 ; Sun & Qiu, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

Do syntopic host species harbour similar symbiotic communities? The case ofChaetopterusspp. (Annelida: Chaetopteridae)

Britayev

Mekhova

Deart

et al. 2017

PeerJ

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To assess whether closely related host species harbour similar symbiotic communities, we studied two polychaetes, Chaetopterus sp. (n = 11) and Chaetopterus cf. appendiculatus (n = 83) living in soft sediments of Nhatrang Bay (South China Sea, Vietnam). The former harboured the porcellanid crabs Polyonyx cf. heok and Polyonyx sp., the pinnotherid crab Tetrias sp. and the tergipedid nudibranch Phestilla sp. The latter harboured the polynoid polychaete Ophthalmonoe pettiboneae, the carapid fish Onuxodon fowleri and the porcellanid crab Eulenaios cometes, all of which, except O. fowleri, seemed to be specialized symbionts. The species richness and mean intensity of the symbionts were higher in Chaetopterus sp. than in C. cf. appendiculatus (1.8 and 1.02 species and 3.0 and 1.05 individuals per host respectively). We suggest that the lower density of Chaetopterus sp. may explain the higher number of associated symbionts observed, as well as the 100% prevalence (69.5% in C. cf. appenciculatus). Most Chaetopterus sp. harboured two symbiotic species, which was extremely rare in C. cf. appendiculatus, suggesting lower interspecific interactions in the former. The crab and nudibranch symbionts of Chaetopterus sp. often shared a host and lived in pairs, thus partitioning resources. This led to the species coexisting in the tubes of Chaetopterus sp., establishing a tightly packed community, indicating high species richness and mean intensity, together with a low species dominance. In contrast, the aggressive, strictly territorial species associated with C. cf. appendiculatus established a symbiotic community strongly dominated by single species and, thus, low species richness and mean intensity. Therefore, we suggest that interspecific interactions are determining species richness, intensity and dominance, while intraspecific interactions are influencing only intensity and abundance. It is possible that species composition may have influenced the differences in community structure observed. We hypothesize that both host species could originally be allopatric. The evolutionary specialization of the symbiotic communities would occur in separated geographical areas, while the posterior disappearance of the existing geographical barriers would lead to the overlapped distribution.

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Section: Resultsmentioning

confidence: 99%

Do syntopic host species harbour similar symbiotic communities? The case ofChaetopterusspp. (Annelida: Chaetopteridae)

Britayev

Mekhova

Deart

et al. 2017

PeerJ

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“…Taiwan is only roughly 600 km away from Hong Kong, with a similar climate. In Hong Kong, information about the taxonomy of Chaetopteridae is scarce (Sun & Qiu 2014). Mesochaetopterus japonicus was reported from protected beaches, with the symbiotic pinnotherid crab Tritodynamia rathuni living inside the tube (Morton & Morton 1983), but the exact sampling locations were not given.…”

Section: Discussionmentioning

confidence: 99%

A new species of Mesochaetopterus (Annelida, Chaetopteridae) from Hong Kong, with comments on the phylogeny of the family

Zhang

Rouse

Qiu

2015

Zootaxa

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We described a new species, Mesochaetopterus tingkokensis, based on 14 specimens collected from an intertidal area in Hong Kong. This species is large (body length of complete specimens 17.9-24.1 cm), with 9, 2 and 36-41 chaetigers in region A, B and C, respectively. It belongs to a small group of Mesochaetopterus species with an expanded wing-shaped notopodia in chaetiger B2. The new species can be distinguished from other Mesochaetopterus species in this group by having a pair of palps with two longitudinal stripes formed by suture-like discontinuous orange bands, more teeth in the uncini of region B and C neuropodia, and presence of a bundle of simple chaetae in region C notopodia. Comparison with other chaetopterids based on partial cytochrome oxidase I (COI), 18S and 28S rRNA gene sequences confirmed the placement of M. tingkokensis n. sp.within Mesochaetopterus and its distinction from other members of this genus with the available DNA sequences. The phylogenetic tree base on COI showed that Mesochaetopterus and Chaetopterus are paraphyletic, but that based on concatenated data, 18S and 28S showed they are monophyletic with low supporting values.

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“…As is the case tor C. appendiculatus, some ot these species have not yet been tormally redescribed. However, as many as nine species have recently been described, and tive have been redescribed in the recent literature (Nishi 2001;Nishi et al 2000;Nishi et al 2009;Osborn et al 2007;Sun & Qiu 2014 (Table 4).…”

Section: 1-hosts Characteristicsmentioning

confidence: 99%

Peer Review #1 of "Do syntopic host species harbour similar symbiotic communities? The case of Chaetopterus spp. (Annelida: Chaetopteridae) (v0.1)"

2017

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To assess whether closely related host species harbour similar symbiotic communities, we studied two polychaetes, Chaetopterus sp. (n=11) and Chaetopterus cf. appendiculatus (n=83) living in soft sediments of Nhatrang Bay (South China Sea, Vietnam). The former harboured the porcellanid crabs Polyonyx cf. heox and Polyonyx sp., the pinnotherid crab Tetrias sp. and the tergipedid nudibranch Phestilla sp. The latter harboured the polynoid polychaete Ophthalmonoe pettiboneae, the carapid fish Onuxodon fowleri and the porcellanid crab Eulenaios cometes, all of which, except O. fowleri, seemed to be specialized symbionts. The species richness and mean intensity of the symbionts were higher in Chaetopterus sp. than in C. cf. appendiculatus (1.8 and 1.02 species and 3.0 and 1.05 individuals per host respectively). We suggest that the lower density of Chaetopterus sp. may explain the higher number of associated symbionts observed, as well as the 100% prevalence (69.5% in C. cf. appenciculatus). Most Chaetopterus sp. harboured two symbiotic species, which was extremely rare in C. cf. appendiculatus, suggesting lower interspecific interactions in the former. The crab and nudibranch symbionts of Chaetopterus sp. often shared a host and lived in pairs, thus partitioning resources. This led to the species coexisting in the tubes of Chaetopterus sp., establishing a tightly packed community, indicating high species richness and mean intensity, together with a low species dominance. In contrast, the aggressive, strictly territorial species associated with C. cf. appendiculatus established a symbiotic community strongly dominated by single species and, thus, low species richness and mean intensity. Therefore, we suggest that interspecific interactions are determining species richness, intensity and dominance, while intraspecific interactions are influencing only intensity and abundance. It is possible that species composition may have influenced the differences in community structure observed. We hypothesize that both host species could originally be allopatric. The evolutionary specialization of the symbiotic communities would occur in separated

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A new species of Chaetopterus (Annelida, Chaetopteridae) from Hong Kong

Cited by 8 publications

References 8 publications

Do syntopic host species harbour similar symbiotic communities? The case ofChaetopterusspp. (Annelida: Chaetopteridae)

Do syntopic host species harbour similar symbiotic communities? The case ofChaetopterusspp. (Annelida: Chaetopteridae)

A new species of Mesochaetopterus (Annelida, Chaetopteridae) from Hong Kong, with comments on the phylogeny of the family

Peer Review #1 of "Do syntopic host species harbour similar symbiotic communities? The case of Chaetopterus spp. (Annelida: Chaetopteridae) (v0.1)"

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