First record of the sipunculan worm Phascolion (Phascolion) caupo Hendrix, 1975 in the Mediterranean Sea

Ferrero-Vicente, Luis Miguel; Loya-Fernández, Ángel; Marco‐Méndez, Candela; Martínez‐García, Elena; Sáiz-Salinas, José Ignacio; Sánchez-Lizaso, José Luís

doi:10.12681/mms.24

Cited by 10 publications

(12 citation statements)

References 7 publications

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“…Correlation between body and shelter size was strong, and it is known that A. muelleri left its shelter just when all available space of the shelter-in a contracted state of the animal-is occupied for its body, ensuring that the animal can always be covered by the tube (Ferrero-Vicente et al, 2013b). This preference for Ditrupa tubes was not found for other shell/tube-dwelling species of similar size from the western Mediterranean (Phascolion caupo Hendrix, 1975 and Phascolion strombus strombus) (Ferrero-Vicente et al, 2012, 2013b.…”

Section: Discussionmentioning

confidence: 96%

Observations on the ecology and reproductive biology of the sipunculan wormAspidosiphon muelleriin temperate waters

et al. 2014

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A population of the sipunculan worm Aspidosiphon muelleri, located in temperate waters of the western Mediterranean Sea, was monitored monthly for a year. Some aspects related to its ecology and reproductive biology are shown in the present work. The sex-ratio for this population was close to 1:1 (54% females vs 46% males), thus indicating a dioecious reproduction, although showing a lack of sexual dimorphism. Oocytes were detected in females from 4-5 mm; this size might be reached by A. muelleri in a few months. The population density increased notably during the summer (June-August). The spawning event date was indirectly estimated from the average size of the oocytes and the percentage of females with free oocytes in the coelom. Both variables were significantly correlated to shallow water temperature (Pearson correlation; P ¼ 0.003 and P ¼ 0.001, respectively). Oocyte size was also significantly correlated to average irradiance level (Pearson correlation; P ¼ 0.044). Spawning took place between August and September (when the water temperature is getting close to its annual maximum) and may last only a few weeks in these temperate waters. The abundance of A. muelleri decreased drastically in September, likely as a consequence of the spawning event effort. Bivalves of the species Epilepton clarkiae were collected together with specimens of A. muelleri living inside the polychaete tubes used as shelters by the sipunculans, with a prevalence of 11.64%. To a lesser extent some Foraminifera were also reported attached to the body of the sipunculans.

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Section: Discussionmentioning

confidence: 96%

Observations on the ecology and reproductive biology of the sipunculan wormAspidosiphon muelleriin temperate waters

et al. 2014

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“…2). Species identification was carried out according to (Saiz-Salinas 1993;Cutler 1994;Pancucci-Papadopoulou et al 1999;Açik 2008Açik , 2009Açik , 2011Ferrero-Vicente et al 2012).…”

Section: Methodsmentioning

confidence: 99%

“…Nonetheless, there is a lack of studies identifying which particular species inhabit these coral colonies and, as a result, their associated fauna is practically unknown. The number of sipunculans in the Mediterranean Sea reaches up to 36 different species (Ferrero-Vicente et al 2012), and several of them are able to bore into coral (Saiz-Salinas 1993;Pancucci-Papadopoulou et al 1999), but this ability is still not adequately documented for most species.…”

Section: Introductionmentioning

confidence: 99%

Sipuncula inhabiting the coral Oculina patagonica in the western Mediterranean Sea

2016

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Background: We analyzed the sipunculan fauna inhabiting the scleractinian coral Oculina patagonica in the Marine Reserve of Tabarca Island (western Mediterranean). Results: Five sipunculan species were collected from 2011 to 2014: Phascolosoma stephensoni, P. granulatum, P. cf. agassizii, Aspidosiphon misakiensis, and Golfingia vulgaris. All five species were reported for the first time inhabiting O. patagonica; with P. cf. agassizii being a new record for the Iberian Peninsula. The average abundance of sipunculans inhabiting the coral was 468.75 ± 158.04 ind m

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“…apparatus of external muscles) characters were evaluated based on Hendrix (); Saíz‐Salinas (, ); Cutler (); Ferrero‐Vicente et al . () (see Appendix S1).…”

Section: Methodsmentioning

confidence: 99%

Complex epidermal organs of Phascolion (Sipuncula): insights into the evolution of bimodal secretory cells in annelids

2014

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The epidermal organs of an undescribed Phascolion species from the Balearic Islands were investigated using SEM, TEM, LM, CLSM and μCT methods. We found axial receptor cells confirming the previously assumed sensory function of epidermal organs. Our analyses also revealed six types of secretory cells. Some secretory cells types are capable of secreting filamentous and amorphous secretion in two different ways simultaneously (bimodal secretion). The high diversity of cell types, the complex pattern of acinar units, and the absence of a common gland pore make epidermal organs of Phascolion unique amongst sipunculans (Phascolion type). Our reconstruction of the evolution of the epidermal organs of Sipuncula revealed that Phascolion‐type epidermal organs may have derived from either Golfingia‐, Sipunculus‐ or Phascolosoma‐type epidermal organs. The oldest known sipunculans were Golfingia‐like and had epidermal organs, which might resemble the architecture of the Golfingia‐type epidermal organs in extant taxa. Thus, it can be hypothesized that bimodal secretory cells (e.g. basophilic secretory cells) were part of the sipunculan ground pattern. Moreover, bimodal secretory cells of Phascolion look strikingly similar to those found in various annelid glands and thus might even be part of the ground pattern of stem species of Sipuncula + Pleistoannelida.

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First record of the sipunculan worm Phascolion (Phascolion) caupo Hendrix, 1975 in the Mediterranean Sea

Cited by 10 publications

References 7 publications

Observations on the ecology and reproductive biology of the sipunculan wormAspidosiphon muelleriin temperate waters

Observations on the ecology and reproductive biology of the sipunculan wormAspidosiphon muelleriin temperate waters

Sipuncula inhabiting the coral Oculina patagonica in the western Mediterranean Sea

Complex epidermal organs of Phascolion (Sipuncula): insights into the evolution of bimodal secretory cells in annelids

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