Syllidae (Annelida) from the Alborán Sea (Western Mediterranean), with the description of a new species of Paraehlersia San Martín, 2003 Author Prado, Ainhoa 0009-0008-3964-7641 Departamento de Biología (Genética), Facultad de Ciencias, Universidad Autónoma de Madrid, calle Darwin 2, Canto Blanco, 28049 Madrid, Spain. ainhoa.prado@estudiante.uam.es Author Martín, Guillermo San 0000-0002-8360-6221 Departamento de Biología (Zoología), Centro de Investigación en Biodiversidad y Cambio global (CIBC-UAM), Facultad de Ciencias, Universidad Autónoma de Madrid, calle Darwin, 2, Canto Blanco, 28049 Madrid, Spain. guillermo.sanmartin@uam.es text Zootaxa 2024 2024-04-11 5437 1 87 104 http://dx.doi.org/10.11646/zootaxa.5437.1.5 journal article 293435 10.11646/zootaxa.5437.1.5 5ca2a2ea-91fd-47dd-9273-e45ae8a23e97 1175-5326 10959306 1D2A6EBD-A64D-4A77-8455-DEE05D92909A

TABLE 3. Key morphological characters of the currently known species of Paraehlersia.

Species (Geographical location)	Length of spiniger-like chaetae (µm)	Dorsal simple chaetae	Aciculae	Length of pharynx (chaetigers)	proventricle (chaetigers) / no. of rows of	Shape of posterior falcigers	References
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P. articulata (Kudenov & Harris, 1995) (California)	950–1000	Unidentate on first chaetigers then becoming progressively bidentate	Diamond shaped on the tip at the anterior part of the body, progressively blunt along the body	~6–7	~5 / 22–24	Bidentate, proximal tooth slightly longer and widter than distal one. Both sharp	Kudenov & Harris (1995)
P. dionisi (Núñez y San Martín, 1991) (Canary Islands and Western Mediterranean Sea)	51–54	Moderately thick, not bifid strongly serrated margins	Thin, distal thickening with small tip	~12	~7 / 30	Bidentate, proximal tooth thicker than distal one, c shaped. Short subdistal spines	Nüñez & San Martín (1991); San Martín (2003)
P. ehlersiaeformis (Augener, 1913) (Australia)	50–47	Bifid with short subdistal spines	Distally acuminate, lancet-shaped	7	5 / 21	Bidentate, proximal tooth much thicker than distal one, bent at right angle respect to it or slightly curved towards shaft. Short subdistal spines	Augener (1913); San Martín & Hutchings (2006)
P. ferrugina (Langerhans, 1881) (North Atlantic Ocean and Mediterranean Sea)	100–75	Bidentate, with teeth of different sizes, with short subdistal spines	Truncate, subdistally enlarged, with oblique tip	~6–7	6–7 / ~25	Bidentate, proximal tooth strongly thicker, downward dressed. Thin sharp distal tooth, upward dressed, following the vertical of the chaeta	Langerhans (1881); Laubier (1968); San Martín (2003)
P. kawesqar Soto & San Martín, 2018 (Chilean Patagonia)	72–48	Very thin, flat and sharp on mid-posterior segments	Distally acuminate	7	14–15 / ~27	Bidentate, proximal tooth much thicker and significantly larger than distal one. Short subdistal spines may exist	Soto & San Martín (2018)
P. longichaetosa Fukuda et al., 2012 (Brazil)	120–60	Bidentate with short subdistal spines	Bent almost at right angle, subdistally irregularly inflated, with pointed tip	7–9	5–8 / 22–28	Bidentate, proximal tooth slightly thicker than distal one. Short subdistal spines	Fukuda et al. (2012)
P. martapolae Fukuda et al., 2012 (Brazil)	82–35	Distally irregularly rounded	Bent almost at right angle, apparently flattened on tip	9–12	5–6.5 / 21–24	Bidentate, short, proximal tooth slightly thicker than distal one. C shaped. Short subdistal spines	Fukuda et al. (2012)
P. pamelae n. sp. (Alborán Sea)	84–99	Slightly bent tip, bifid with subdistal tooth slightly smaller than distal one	Bent at ~45º, rounded in middle segments, sharp at final segments	10.5	~5 / 18	Bidentate, c shaped, proximal and distal teeth similar in size, proximal one slightly smaller sometimes. Short subdistal spines	This paper
P. weissmannioides (Augener, 1913) (Australia)	100–95	Truncate, slightly bifid distally, with short subdistal spines	Straight, distally rounded, oblique with short tip	~7	4–5 / 22	Bidentate, proximal tooth thick. Long subdistal spines in proximity of tooth	Augener (1913); San Martín & Hutchings (2006)