taxonID	type	description	language	source
88F959924A655690BF9D019119BE3A8C.taxon	diagnosis	Diagnosis (after Magalhaes and Blake 2020). Prostomium rounded, without palpode; eyespots present in multiple spots. Peristomium clearly distinct from prostomium. First chaetiger biramous. Nine to thirteen thoracic chaetigers. Thoracic chaetigers with only capillaries in both rami. Thorax clearly demarked from abdomen. All abdominal segments transitional with notopodial capillaries and neuropodial hooded hooks. Branchiae absent. Genital pores, up to four pairs starting from chaetigers 9 / 10 or 10 / 11. Lateral organs present in thorax and abdomen. Pygidium adorned with a pair of ventral cirri.	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
A84232821A8A5A5EBC83EDD83CBD7A10.taxon	description	Figs 2 A-F, 3 A-K, 4 A-G	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
A84232821A8A5A5EBC83EDD83CBD7A10.taxon	materials_examined	Material examined. Holotype: TIO-BTS-Poly 139, complete, Beibu Gulf, sta. S 31 (19.65 ° N, 107.70 ° E), 65 m depth, coll. Jun-Hui Lin, 23 May 2021. Paratypes: TIO-BTS-Poly 140 • 1 spec., incomplete, same information as holotype. TIO-BTS-Poly 141 • 4 specs, all incomplete, Beibu Gulf, sta. S 42 (19.25 ° N, 108.10 ° E), 59 m depth, coll. Jun-Hui Lin, 24 May 2021. TIO-BTS-Poly 142 • 3 specs, TIO-BTS-Poly 143 • 5 specs and TIO-BTS-Poly 144 • 6 specs, all incomplete, Beibu Gulf, sta. S 44 (19.25 ° N, 108.50 ° E), 36 m depth, coll. Jun-Hui Lin, 24 May 2021. TIO-BTS-Poly 145 • 4 specs, TIO-BTS-Poly 146 • 3 specs and TIO-BTS-Poly 147 • 1 spec., all incomplete, Beibu Gulf, sta. S 51 (18.85 ° N, 108.50 ° E), 15 m depth, coll. Jun-Hui Lin, 26 May 2021. TIO-BTS-Poly 148 • 1 spec., incomplete (posterior fragment with pygidium), Beibu Gulf, sta. S 14 (20.456 ° N, 108.50 ° E), 55 m depth, coll. You-Ling Ye, 27 Nov 2022.	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
A84232821A8A5A5EBC83EDD83CBD7A10.taxon	description	Description. Holotype complete, but broken into two fragments. Anterior fragment heavily coiled (Fig. 3 A), measuring 35.99 mm long by 1.27 mm wide (at chaetiger 15) for 71 chaetigers; posterior fragment measuring 10.69 mm long for 35 chaetigers. Paratypes incomplete, ranging from 2.68 - 19.12 mm long, 0.45 - 1.52 mm wide for 15 - 34 chaetigers. Body nearly cylindrical, widest in anterior abdomen. Color in alcohol tan (Fig. 3 C). Nuchal organ not observed. Prostomium rounded without palpode, partially concealed by peristomium (Figs 2 A, B, 3 A-C); eyespots present on lateral sides of prostomium when dissected (obviously seen in some specimens as shown in Fig. 3 D). Proboscis retracted in holotype (Fig. 3 A-C), with numerous minute papillae. Peristomium achaetous, wider than long, longer than chaetiger 1 (Figs 2 A, 3 A). Intersegmental groove distinct between peristomium and chaetiger 1 (Figs 2 A, B, 3 B, 4 A, B). Thorax with 11 chaetigers (Fig. 2 A) in holotype, first chaetiger biramous (Figs 2 A, B, 3 B). Thoracic segments bi-annulated, wider than long, with epithelium areolated from peristomium to chaetiger 7, faintly areolated on chaetiger 8, and smooth on following segments (Figs 2 A, B, 3 B). Chaetigers 1 - 11 with only capillaries in both rami (Figs 2 A, 3 A), 18 - 30 per fascicle in notopodia and 20 - 30 per fascicle in neuropodia. Notopodia inserted dorso-laterally, and neuropodia ventro-lateral. Chaetal fascicles inserted just near midline of thoracic segments (Figs 2 A-C, 3 B). Lateral organs located between noto- and neuropodia at intrasegmental grooves, closer to notopodia in thorax and anterior abdomen, as small pores (Figs 2 A, 3 B). Genital pores present on intersegmental grooves of between chaetigers 9 / 10, 10 / 11, 11 / 12, and 12 / 13 in holotype. Transition between thorax and abdomen marked by chaetal change (Figs 2 A, C, 3 E, 4 C, D). Abdominal segments longer and wider than posterior thoracic chaetigers in anterior abdomen (Fig. 3 A, E), tapering gradually towards pygidium (Fig. 3 G, H). Parapodial lobes reduced in anterior abdomen (Fig. 3 A, E), well separated. Neuropodial tori pad protruded above body surface from middle-posterior abdomen (Fig. 3 H). Abdominal chaetigers transitional with notopodial capillaries and neuropodial hooks throughout (Figs 2 C-E, 3 G, H), with 15 - 20 notopodial capillaries and 60 - 70 neuropodial hooks in anterior abdomen, decreasing to 8 - 10 capillaries and 30 - 40 hooks in posterior end. In anterior abdomen, notopodial lobes located dorso-laterally and neuropodial lobes ventro-lateral (Figs 2 C, 3 E). From middle abdomen, notopodial lobes lateral and neuropodial lobes ventral (Figs 2 D, E, 3 A, H). Chaetal fascicles positioned posterior to midsegment in anterior abdomen (Fig. 3 E), and near posterior edge of segment toward the pygidium (Fig. 3 F). In the far posterior abdomen, neuropodial lobes close to each other with a small gap (Figs 2 E, 3 H, 4 E). Hooded hooks with angled node, evident constriction, developed shoulder, posterior shaft longer than anterior one, attenuated to terminal end (Figs 2 F, 3 J). Hood with dentate distal edge (Figs 3 K, 4 F, G), slightly longer than wide (Figs 2 F, 3 J). Hooded hooks (Fig. 4 G) with three rows of teeth above main fang: four teeth in basal row, three teeth in middle row, two smaller teeth in apical row. Main fang subtriangular, longer than wide. No branchiae observed in abdomen. Pygidium with two digitate anal cirri on ventral side (Figs 2 E, 3 I). Methyl green staining pattern (Figs 2 A, C, D, 3 A, E-H). Body stained with pale green and small dark spots of stain scattered from peristomium to prechaetal part of chaetiger 9. Body stained dark blue in dorsum of from postchaetal part of chaetiger 9 to chaetiger 20, excluding intra- and intersegmental grooves and parapodial lobes, extending to dorsal sides of neuropodia. Four pairs of genital pores (between chaetigers 9 - 13) stained dark blue in holotype. From chaetiger 21, each segment has a dorsal transverse band of dark stain located on between notopodial tori, as well as stain around noto- and neuropodial tori. In far posterior abdomen, dorsum stained dark blue, reaching dorsal side of neuropodial tori, interrupted by intersegmental groove.	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
A84232821A8A5A5EBC83EDD83CBD7A10.taxon	distribution	Distribution. Currently known from Beibu Gulf (South China Sea) and off the Fujian coast.	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
A84232821A8A5A5EBC83EDD83CBD7A10.taxon	etymology	Etymology. The specific name was derived from its variable number of thoracic chaetigers (9 - 13) during ontogeny.	en	Lin, Jun-Hui, Garcia-Garza, Maria E., Mou, Jian-Feng, Lin, He-Shan (2023): Description of a new Promastobranchus species (Annelida, Capitellidae) from Chinese coasts, with molecular evidence for intraspecific variation in the number of thoracic chaetigers. ZooKeys 1174: 1-14, DOI: http://dx.doi.org/10.3897/zookeys.1174.106624, URL: http://dx.doi.org/10.3897/zookeys.1174.106624
