taxonID	type	description	language	source
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	description	Figs 1 A, B, E; 2 A-J; 3 A-I	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	materials_examined	Material examined. Holotype and hologenophore: NTNU-VM- 86011, Saudi Arabia (Red Sea), Gulf of Aqaba, Magna, 28 ° 26 ' 57.3 " N, 34 ° 45 ' 35.4 " E, intertidal, rocky beach among coarse-grained sand under rocks, collected by Marcos A. L. Teixeira and Chloe Julie Lois Fourreau, 11 / 05 / 2023, GenBank (mtCOI): PP 279020. Paratypes and paragenophores: 7 specimens, NTNU-VM- 86010, NTNU-VM- 86012 - NTNU-VM- 86017, Saudi Arabia (Red Sea), Gulf of Aqaba, Magna, 28 ° 26 ' 57.3 " N, 34 ° 45 ' 35.4 " E, intertidal, rocky beach under rocks among coarse-grained sand, collected by Marcos A. L. Teixeira and Chloe Julie Lois Fourreau, 11 / 05 / 2023, GenBank (mtCOI): PP 279009 - PP 279010, PP 279017 - PP 279019, PP 279029, and PP 279035.	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	diagnosis	Diagnosis. Four pairs of tentacular cirri, postero-dorsal one reaching chaetiger 7 - 9; ratio of DPCL / HL = 3.6 x. Eversible pharynx with one pair of dark brown curved jaws with seven or eight denticles; two longitudinal canals emerging from the pulp cavity, both in the mid-section of the jaw. Pharynx consisting of maxillary and oral rings with conical shaped paragnaths. Maxillary ring: Area I = 2 small paragnaths arranged in a longitudinal line. Area II = Cluster of 5 - 7 small paragnaths. Area III = central patch of nine small paragnaths, lateral patches with two small paragnaths each. Area IV = 13 small paragnaths arranged in wedge shape without any bars. Oral ring: Area V = a triangle of three large paragnaths. Area VI (a + b) = two narrow bar-shaped paragnaths, one on each side, displayed as a straight line. Areas VII-VIII = 20 - 24 small paragnaths in total; Area VII, ridge region with two transverse paragnaths, furrow regions with two longitudinal paragnaths each; Area VIII, ridge regions with one paragnath each, furrow regions with two longitudinal paragnaths each. Dorsal cirrus longer than ventral cirrus throughout the body; much longer in median chaetigers, ratio DCL / VCL = 2.8 - 3 x. Ventral Tentacular cirri of median chaetigers shorter than ventral ligule, ratio of VCL / VLL = 0.7 x. Dorsal ligule oval, ending tip gradually becomes thinner throughout the body; finger-like tip in median and posterior parapodia. Dorsal ligules of median chaetigers subequal to dorsal Tentacular cirri, tips shorter than dorsal Tentacular cirri. Posteriormost dorsal ligules greatly expanded (3 x the length of the ventral ligule) and visibly much wider (2.5 - 3 x the width of median ligule) than anterior and median ones (2 x the width of median ligule). Pygidial Tentacular cirri as long as last 12 - 14 chaetigers.	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	distribution	Distribution and habitat. Confined to the northeastern Red Sea (Duba, Shushah Island) and Gulf of Aqaba (Magna) so far. Type locality: Saudi Arabia, Gulf of Aqaba: Magna region (marine site), 28 ° 26 ' 57.3 " N, 34 ° 45 ' 35.4 " E. Specimens collected both in lagoon-like environments and fully marine sites in rocky areas, usually among coarse-grained sand under rocks. Apparently more abundant and easier to find in marine sites from the Gulf of Aqaba. Can be found in sympatry with P. damietta (Fig. 1 B, C) and P. suezensis (Fig. 1 B, D). The latter two species as described by Elgetany et al. (2022).	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	etymology	Etymology. The species designation pays tribute to the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, a globally recognized graduate-level research institution. This naming honours KAUST's substantial and enduring contributions to marine science, particularly in advancing our understanding of the Red Sea over the course of more than a decade. Through its dedicated research efforts, KAUST has significantly enriched the scientific community's knowledge of this unique marine environment.	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
D0B4FFBB1B9A53CEBC6B89F57F3105E4.taxon	description	Description. Specimens used: NTNU-VM- 86011 (holotype) and NTNU-VM- 86015 (paratype), both preserved in ethanol 96 %, stored at NTNU University Museum (Norway, NTNU-VM). Body / measurements: Body with a prominent dorsal blood vessel (Fig. 2 I); stout anteriorly, posteriorly gradually tapering toward pygidium. Colour in preserved specimens is yellowish-brown. Holotype, NTNU-VM- 86011, large specimen, complete, TL = 55 mm, L 15 = 7 mm, W 15 = 2.12 mm, with 115 chaetigers. Paratype, NTNU-VM- 86015, small specimen, complete, TL = 24 mm, L 15 = 5 mm, W 15 = 1.06 mm, with 85 chaetigers. Head (Fig. 2 A, B, E, J): Prostomium pyriform, 1.2 x wider than long; 2.5 x longer than antennae. Palps with a round or conical palpostyle (Fig. 2 A); palpophore longer than wide, subequal to the entire length of prostomium. Antennae separated, gap half of antennal diameter (Fig. 2 E); tapered, less than half the length of the palpophore. Eyes black, anterior and posterior pairs well separated (Fig. 2 J). Anterior pair of eyes oval shaped, as wide as antennal diameter; posterior pair of eyes round or oval shaped, subequal width to anterior pair. Distance between the anterior eyes 1.25 x longer than posterior ones. Nuchal organs covered by the tentacular belt. Tentacular cirri: Tentacular cirri longer than mid body width. Tentacular cirri pattern: postero-dorsal Tentacular cirri twice longer than antero-dorsal ones; postero-dorsal reaching chaetiger 7 - 9 (Fig. 2 I). Antero-dorsal Tentacular cirri reaching chaetigers 3 and 4; 1.7 x longer than palpophore. Antero-ventral Tentacular cirri 1.4 x shorter than postero-ventral ones; antero-ventral shorter than palpophore. Dorsal cirrophores wrinkled, cylindrical. Pharynx: Pair of dark brown curved jaws with 7 - 8 denticles; two longitudinal canals emerging from the pulp cavity, both in the mid-section of the jaw (Fig. 2 C). Pharynx consisting of maxillary and oral rings with conical shaped paragnaths (Fig. 2 A, B). Maxillary ring: Area I = two small paragnaths arranged in a longitudinal line (Fig. 2 F). Area II = Cluster of 5 - 7 small paragnaths (Fig. 2 F). Area III = central patch of nine small paragnaths, lateral patches with two small paragnaths each (Fig. 2 D). Area IV = 13 small paragnaths arranged in wedge shape without any bars (Fig. 2 D). Oral ring: Area V = a triangle of three large paragnaths (Fig. 2 E). Area VI (a + b) = two narrow bar-shaped paragnaths, one on each side, displayed as a straight line (Fig. 2 E). Areas VII-VIII = 20 - 24 small paragnaths in total; Area VII, ridge region with two transverse paragnaths, furrow regions with two longitudinal paragnaths each (Fig. 2 G); Area VIII, ridge regions with one paragnath each, furrow regions with two longitudinal paragnaths each (Fig. 2 G). Notopodia: Dorsal Tentacular cirri slender, tapering, subequal to dorsal ligule in anterior (Fig. 3 A) and median (Fig. 3 B) parapodia, 1.8 x shorter in posterior ones (Fig. 3 C); Tentacular cirri longer than proximal part of dorsal ligule in anterior and median parapodia, 1.4 x shorter in posterior ones. Dorsal Tentacular cirri longer than ventral one throughout the body, much longer in median chaetigers; 1.7 x longer in anterior and posterior parapodia, 2.4 x in median ones. Dorsal ligules oval, ending tip gradually becomes thinner throughout the body; finger-like tip in median and posterior parapodia (Fig. 3 A-C). Dorsal ligules 1.4 x longer and twice as wider as median ligules in anterior parapodia (Fig. 3 A), 1.6 x longer and twice wider in median ones (Fig. 3 B), twice longer and 2.5 - 3.0 x wider than median ligules in posterior parapodia (Fig. 3 C). Posteriormost dorsal ligules greatly expanded; 3 x the length of the ventral ligule; visibly much wider (2.5 - 3 x) than median ligule (Fig. 3 C, I). Distal part of dorsal ligules slightly longer than proximal one in anterior and median parapodia, 1.5 x shorter in posterior ones. Neuropodia: Ventral Tentacular cirri slender with tapering tip, 1.35 x shorter throughout the body (Fig. 3 A-C). Neuroacicular ligules subequal to ventral ligule in anterior parapodia, 1.3 - 1.4 x longer in median and posterior ones. Ventral ligules oval in anterior parapodia, gradually becomes thinner throughout the body with a tapering tip; ventral ligules 1.4 x shorter than dorsal ligules in anterior parapodia (Fig. 3 A), twice shorter in median ones (Fig. 3 B), 2.5 - 3 x shorter in posterior parapodia (Fig. 3 C). Chaetae: Notochaetae with homogomph spinigers; spinigers with lightly serrated blade, evenly spaced (Fig. 3 D), numerous and present throughout the whole body. Neurochaetal supra-acicular fascicle with homogomph spinigers (Fig. 3 F) and heterogomph falcigers (Fig. 3 H) present throughout the whole body; spinigers with coarsely serrated blade, present in the dorsal most position; falcigers with slender serrated long blade (Fig. 3 H). Neurochaetal subacicular fascicle with heterogomph spinigers (Fig. 3 G) and heterogomph falcigers (Fig. 3 E) both present throughout the whole body; spinigers with lightly serrated blades (Fig. 3 G); falcigers similar to supra-acicular ones (Fig. 3 H), present in the ventral most position. Pygidium: With a pair of long cylindrical slender anal Tentacular cirri, as long as last 12 - 14 chaetigers (Fig. 2 H).	en	Teixeira, Marcos A. L., Fourreau, Chloe Julie Lois, Sampere-Valverde, Juan, Carvalho, Susana (2024): Two new records and description of a new Perinereis (Annelida, Nereididae) species for the Saudi Arabian Red Sea region. ZooKeys 1196: 331-354, DOI: http://dx.doi.org/10.3897/zookeys.1196.115260, URL: http://dx.doi.org/10.3897/zookeys.1196.115260
