Euchone pararosea, Giangrande & Licciano, 2006
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publication ID |
https://doi.org/ 10.1080/00222930600901458 |
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persistent identifier |
https://treatment.plazi.org/id/03C2878E-1F3E-FFB4-FE72-F033FE59FD22 |
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treatment provided by |
Felipe |
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scientific name |
Euchone pararosea |
| status |
sp. nov. |
Euchone pararosea View in CoL n. sp.
( Figure 2 View Figure 2 )
as Euchone rosea in Giangrande (1989).
Holotype: Gulf of Policastro (South Tyrrhenian Sea), 1987, 15 m depth on sand bottom, MNCN 16.01 About MNCN /10328 . Paratypes: two specimens from the same locality, PCZL .
Description
Holotype complete with eight thoracic and 14 abdominal chaetigers ( Figure 1A, B View Figure 1 ) of which six form the anal depression. Branchial crown 1.5 mm, total thorax-abdomen length 4 mm; maximum width 0.5 mm. Branchial lobes each with six fully developed radioles with palmate membrane developed for the entire length leaving only a filiform tip free ( Figure 2C View Figure 2 ). Dorsal lips pointed, dorsal radiolar appendages not detected. Ventral lip very low, several pairs (four to five) of ventral radiolar appendages ( Figure 2G View Figure 2 ). Collar high, regularly crenulated, of similar height ventrally and dorsally, with about the same length as branchial base, and with very small ventral pointed lappets ( Figure 2A, D View Figure 2 ). Glandular ridge on chaetiger 2. Staining pattern showing a ventral collar shield very dark and a peculiar double eight-shaped pattern in the thorax ( Figure 2A View Figure 2 ), ventral shields visible also without coloration ( Figure 2B View Figure 2 ). Notopodial fascicle from the first chaetiger bearing five elongate narrowly hooded chaetae; chaetigers 2–8 with superior group of four elongate narrowly hooded chaetae and inferior group with three paleate chaetae posteriorly and three bayonet-type anteriorly ( Figure 2I, L View Figure 2 ). Paleate chaetae narrow and with short tip. Neuropodial uncini six per torus, with small teeth of similar size over the main fang ( Figure 2H View Figure 2 ). Abdominal neuropodial fascicles with modified, elongate narrowly hooded chaetae. Notopodia with 11–12 avicular uncini, with main fang surmounted by few rows of small teeth, breast rectangular, not extending beyond distal end of proximal tooth, handles absent ( Figure 2M View Figure 2 ). Intratorus variation present. Uncini of the anal depression different from the pre-depression ones, in being rasp-shaped with more and smaller teeth over the main fang ( Figure 2N View Figure 2 ). Anal depression formed by six chaetigers; with large wings forming a complete medial gap in the anterior margin ( Figure 2E View Figure 2 ). Tube incrusted with sand.
Etymology
The species was named after its apparent similarity to E. rosea .
Remarks
Euchone pararosea View in CoL is only apparently similar to E. rosea View in CoL which it has been firstly confused with. It is distinguished from this species by the crenulated collar showing ventral lappets, the more developed palmate membrane extending for the entire length of radioles, and lastly, for the anal depression morphology even though formed by the same number of chaetigers. Concerning this last character, the higher development of the membranous margin and the presence of a complete anterior medial gap makes E. pararosea View in CoL different not only from E. rosea View in CoL but also from most of the other Euchone species. Similar features are present in E. cochranae Fitzhugh, 2002 View in CoL and in E. heterochaeta Rullier, 1972 , where, however, the anal depression is formed by eight chaetigers and the margin of the gap has a pair of elongate flaps, in E. velifera Banse, 1972 View in CoL , which have the anterior membranous margin entire, and in E. trilobata ( Banse, 1970) , which probably belongs now to the new group Chiade ( Cochrane, 2003). The crenulation of the collar is up to now unique within the genus Euchone View in CoL .
Habitat
Shallow sand bottom.
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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Genus |
Euchone pararosea
| Giangrande, Adriana & Licciano, Margherita 2006 |
Euchone pararosea
| Giangrande & Licciano 2006 |
E. pararosea
| Giangrande & Licciano 2006 |
E. cochranae
| Fitzhugh 2002 |
E. heterochaeta
| Rullier 1972 |
E. velifera
| Banse 1972 |
E. rosea
| Langerhans 1884 |
E. rosea
| Langerhans 1884 |
Euchone
| Malmgren 1866 |