Fabricinuda rosaelenae, López & Rodríguez, 2008
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publication ID |
https://doi.org/ 10.1080/00222930801995754 |
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persistent identifier |
https://treatment.plazi.org/id/205687EE-FFA3-2570-B72D-FB02261DFBFD |
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treatment provided by |
Carolina |
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scientific name |
Fabricinuda rosaelenae |
| status |
sp. nov. |
Fabricinuda rosaelenae View in CoL n. sp.
( Figures 2 View Figure 2 , 3 View Figure 3 )
Material examined
Type series. MNCN 16.01 About MNCN /11031, Las Luisas (10 ° 519150 N–68 ° 169450W), Thalassia testudinum meadow, February 2000, holotype . MNCN 16.01 About MNCN /11032, Tumba Cuatro (10 ° 509090 N–68 ° 159070W), Thalassia testudinum meadow, May 2000, two paratypes . MNCN 16.01 About MNCN /11033, Tumba Cuatro (10 ° 509090 N–68 ° 159070W), Thalassia testudinum meadow, August 2000, paratype . MNCN 16.01 About MNCN /11034, Boca Seca (10 ° 499590 N–68 ° 149210W), Thalassia testudinum meadow, February 2000, paratype . MNCN 16.01 About MNCN /11035, Tumba Cuatro (10 ° 509090 N–68 ° 159070W), Thalassia testudinum meadow, February 2000, paratype . MNCN 16.01 About MNCN /11036, Boca Seca (10 ° 499590 N–68 ° 149210W), dredging besides Thalassia testudinum meadow, November 2000, paratype . MNCN 16.01 About MNCN /11037, Caño Capuchino (10 ° 509130 N–68 ° 179100W), sedimentary area besides Thalassia testudinum meadow, February 2000, two paratypes . MNCN 16.01 About MNCN /10576, Caño Capuchino (10 ° 509130 N– 68 ° 179100W), dredging besides Thalassia testudinum meadow, February 2000, one specimen . MNCN 16.01 About MNCN /10577 Boca Seca (10 ° 499590 N–68 ° 149210W), dredging besides Thalassia testudinum meadow, August 2000, two paratypes .
Description
Holotype largest specimen; length 2.24 mm plus 0.54 mm for branchial crown; width at fourth chaetiger level 0.2 mm; complete; holotype and one paratype are mature males, with spermatids between chaetigers 6 and 8. All specimens with eight thoracic and three abdominal chaetigers ( Figure 2A View Figure 2 ). Branchial crown attachment to peristomium slightly shifted dorsally ( Figure 2C View Figure 2 ). Three pairs of radioles; distal ends filamentous, same width as pinnules. Radioles each with 3–4 pairs of pinnules, all terminating at same height as radioles. Dorsal lips present, short and rounded ( Figure 2E View Figure 2 ); ventral lips absent. One pair of unbranched, vascularized ventral filamentous appendages ( Figures 2B, 2E View Figure 2 ), distinctly wider than pinnules; width of each uniform except for slightly wider distal third (uniform throughout in paratype 3); appreciable dark brown pigmentation and minute transverse wrinkles all along; two thirds as long as radioles. Dorsal margins of branchial lobes not fused to one another ( Figure 2D View Figure 2 ); bases dorsally bearing minute, pigmented basal flanges. Branchial hearts present ( Figures 2B, 2C, 2D View Figure 2 ). Body cylindrical and not too slender ( Figure 2A View Figure 2 ). Peristomial eyes black, crescentic ( Figures 2A, 2C, 2D View Figure 2 ); pygidial eyes ( Figure 2F View Figure 2 ) black and ill-defined, situated in posterior fourth of pygidium. Anterior margin of anterior peristomial ring as a low ridge of even height ventrally, slightly oblique laterally ( Figures 2B, 2C, 2D View Figure 2 ); rounded lobe to either side of dorsal midline, slightly overlapping the higher middorsal conical lobe ( Figure 2D View Figure 2 ); anterior margin pigmented in black all around, dorsal lobes darker. Anterior peristomial ring ventrally glandular; longer than wide, 3–4 times longer than posterior ring; annulation distinct only ventrally ( Figure 2B View Figure 2 ). Chaetigers 1–3 shortest, wider than long; chaetigers 4–8 longer than wide, increasing length posteriorly; chaetiger 9 slightly shorter than 8; remaining abdominal chaetigers successively shorter, chaetiger 11 wider than long ( Figures 2A, 2F View Figure 2 ). Pygidium conical, longer than chaetiger 11 ( Figure 2F View Figure 2 ). Collar chaetae short elongate narrowly hooded ( Figure 3A View Figure 3 ), 4–6 per fascicle. Superior thoracic notochaetae elongate, narrowly hooded, stouter than collar chaetae ( Figures 3B, 3F, 3H View Figure 3 ), 3–6 per fascicle. Inferior thoracic notochaetae of chaetiger 2 similar to collar chaetae ( Figure 3C View Figure 3 ), 2–3 per fascicle; chaetigers 3–7 bearing 1–3 pseudospatulate chaetae ( Figure 3G View Figure 3 ) per fascicle; chaetiger 8 with short, elongate narrowly hooded inferior notochaetae ( Figure 3I View Figure 3 ), similar to those of chaetiger 2, 1–3 per fascicle. Thoracic uncini acicular ( Figure 3D View Figure 3 ); 4–8 per fascicle in straight single rows; large secondary tooth oblique to main fang ( Figure 3E View Figure 3 ); apical teeth slender and slightly decreasing in size towards tip of uncinus; small hood present. Abdominal neuropodia with very elongate, narrowly hooded chaetae ( Figure 2F View Figure 2 ); 1–4 per fascicle. Abdominal uncini with about 10 rows of teeth in profile, 3–4 teeth per row; manubrium about the same length as dentate region, slightly expanded proximally; number of uncini per fascicle slightly decreasing posteriorly, 18–25 on chaetiger 9, 13–20 on chaetiger 10, and 13–16 on chaetiger 11.
Etymology
The new species is named after Rosa Elena Fernández, the first author’s wife, as a little acknowledgement for her unconditional support and understanding.
Remarks
Although superficially resembling Fabricinuda linmnicola ( Hartman, 1951) ( Hartman 1951; Fitzhugh 1990a), the new species herein described is unique within the genus in having both dorsal lips and unbranched, vascularized ventral filamentous appendages. Two species, Fabricinuda pseudopalpa Fitzhugh, 1990 and F. longilabrum Fitzhugh, 2002 , posses well developed dorsal lips, but lack ventral filamentous appendages ( Fitzhugh 1990a, 2002). In turn, the other four described species of the genus, F. limnicola , F. bikinii ( Hartman, 1951) , F. trilobata (Fitzhugh, 1983) and F. pseudocollaris Fitzhugh, 1990 , have unbranched, vascularized ventral filamentous appendages in their branchial crowns, but lack dorsal lips of any kind ( Fitzhugh 1990a). Another unique feature of the new species is the absence of pseudospatulate inferior notochaetae on chaetiger 8 (the remainder of the Fabricinuda species bear this kind of chaeta on chaetigers 3–8). This feature led to a slight re-definition of the genus (see above).
Outside of the genus Fabricinuda , the only similar species is Augeneriella dubia Hartmann-Schröder, 1986 , from southern Australia ( Hartmann-Schröder 1986). This species is unique within Augeneriella in having unbranched, vascularized ventral filamentous appendages, similar to those of some species of Fabricinuda . Another resemblance with F. rosaelenae is the peristomial anterior ring with two dorso-lateral and one mid-dorsal lobes that are very well defined. However, in the former species the anterior end of the peristomial anterior ring has a clear ventral projection forming a rounded, wide lobe as in all other species referred to Augeneriella , and the body wall is covered with calcareous spicules, a unique trait in Fabriciinae .
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