Alitta succinea Leuckart 1847

• Main Authors: Villalobos-Guerrero, Tulio F., Carrera-Parra, Luis F.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Nereididae; Alitta; Alitta succinea; Crassostrea gigas
• Online Access: https://doi.org/10.5281/zenodo.4631769; http://treatment.plazi.org/id/03D687AAFF91EF0DFF73FD857E3C65EB

Alitta succinea (Leuckart, 1847) Figures 1 A −C, 2 Nereis succinea Leuckart, 1847: 154 −156, Pl. 2, Figs. 9, 11; Ehlers 1868: 570 −572, Pl. 22, Figs. 18−22; Heinen 1911: 60, Fig. 21; Gillandt 1979a: 43, 1979b: 23, 25, table 1. Nereis ( Neanthes ) succinea Hartmann-Schröder 1996: 207 −209, Fig. 90 ( partim ). Alitta succinea Bakken & Wilson 2005: 516 −517 ( partim ). Neanthes succinea Sato 2013: 35 −42, Figs. 3 D–F, 4B, 15–17 ( partim ). Type material. North Sea, Germany. Lectotype (ZMH P- 25975) and one paralectotype (ZMH P- 25976) designated by Sato (2013), both incomplete, damaged, Helgoland (no more data). Topotype material. North Sea, Germany. ECOSUR-P2729, 30 specimens, off Dornumersiel, 53°42’N, 07°28’E, 2008−2013, oyster Crassostrea gigas reef. ECOSUR-OH-P734-P741, 8 specimens, off Dornumersiel, 53°42’N, 07°28’E, 2008−2013, oyster Crassostrea gigas reef. ECOSUR-P2730, 4 specimens, NWO Terminal, Jade, Wilhelmshaven, 53°33’27’’N, 08°09’45’’E, 2011. Re-description based on atokous lectotype (variations for specimens indicated in parentheses). Lectotype incomplete, with 67 chaetigers (n= 12, µ= 99.0±7.2, ran: 80–119); TL= 50 mm (n= 12, µ= 67.6±14.5, ran: 32−115), L15= 17 mm (n= 43, µ= 14.7±1.2, ran: 6.5−24), W15= 2.5 mm (n= 43, µ= 2.9±0.3, ran: 1.0−5.0). Prostomium anteriorly complete (Fig. 1 A), 1.4 times wider than long (µ= 1.2, ran: 0.8−1.4); mid-dorsal groove present. Palpophores suboval, as long as wide (usually slightly wider than long, µ= 1.2 times, ran: 0.9−1.5), 0.7 times width of prostomium (µ= 0.8, ran: 0.6−1.0). Antennae close together, short, conical, not exceeding palp tips (Fig. 1 A); extended posteriorly, reaching one-third of prostomium (µ= 0.3; ran: 0.2−0.4). Two pairs of eyes, similar sized, medium, dark, rounded (anterior pair occasionally reniform). Upper peristomial cirri reaching chaetiger 2 (n= 38, µ= 3.0±0.3, ran: 2−5); lower peristomial cirri reaching palp tips (occasionally shorter). Upper tentacular cirri reaching chaetiger 4 (n= 38, µ= 5.4±0.4, ran: 2−8); lower tentacular ...