Euchone rosea Langerhans, 1884
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publication ID |
https://doi.org/ 10.1080/00222930600901458 |
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persistent identifier |
https://treatment.plazi.org/id/03C2878E-1F30-FFBE-FE48-F03CFCDEFEA1 |
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treatment provided by |
Felipe |
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scientific name |
Euchone rosea Langerhans, 1884 |
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Euchone rosea Langerhans, 1884 View in CoL
( Figure 5 View Figure 5 )
Examined material
Seven individuals from Brindisi, 25 m depth, on coralligenous deposits, PCZL .
Re-description
Small worms with eight thoracic and 14 abdominal chaetigers of which six form the anal depression. Branchial crown length 1.5 mm; total thorax–abdomen length 5 mm; maximum width 0.5 mm. Branchial lobes each with five fully developed radioles with palmate membrane for about three-quarters of their length; radiolar flanges present distal to palmate membrane; radioles terminating as flanged filaments ( Figure 5A View Figure 5 ). Dorsal lips pointed ( Figure 5A View Figure 5 ). Radiolar appendages not observed. Ventral lips not observed; several pairs of ventral radiolar appendages. Collar high, with a slight ventral incision and a middorsal gap ( Figure 5A, B View Figure 5 ). Collar terminating at about the same level of the insertion of branchial lobes. Only the collar and first chaetiger stained ( Figure 5A View Figure 5 ). Notopodia in chaetiger 1 with six narrowly hooded chaetae. Notopodial fascicles from chaetigers 2–8 with superior group of three elongate narrowly hooded chaetae and inferior group with five paleate chaetae posteriorly and five bayonet-type anteriorly. Paleate chaetae with long tip ( Figure 5F View Figure 5 ). Neuropodial uncini five per torus, with small teeth of similar size over the main fang ( Figure 5D View Figure 5 ). Abdominal neuropodial fascicles with modified, elongate narrowly hooded chaetae. Notopodia with seven avicular uncini, with main fang surmounted by few rows of small teeth ( Figure 5G View Figure 5 ); uncini of the anal depression 10 in number and with a larger number of teeth over the main fang (rasp-shaped) ( Figure 5H View Figure 5 ). Intratorus variation present. Anal depression formed by six chaetigers, with wings fully developed with quite raised medial margin, slightly incised in the uppermost part ( Figure 5C View Figure 5 ).
Remarks
This is one of the two Euchone species listed in Fauvel (1927), but at that time not yet recorded in the Mediterranean Sea. Our material corresponds well to the original description of specimens from Madeira ( Langerhans 1884). In the Mediterranean Sea the species has been reported by Albertelli et al. (1983) for the Ligurian Sea and by Cantone and Fassari (1982) for the Gulf of Catania (Ionian Sea). All the published data relate to soft sediments. By contrast, Fauvel (1927) reports the species as typical of coralligenous habitats. Only the specimens present in our collection, coming from the South Adriatic Sea and here re-described, have been collected from coralligenous habitats, thus it is possible that the other records represent a different taxon.
Habitat
Coralligenous deposits.
Distribution
Atlantic (Madeira), Ireland coasts, Mediterranean Sea.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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