taxonID	type	description	language	source
6539879547557F62A8DFFA29FD408CEF.taxon	diagnosis	Diagnosis (Modified from Leduc & Zhao 2023). Striated cuticle or clearly annulated, anterior sensilla in two circles, first circle comprising setiform inner labial sensilla, second circle comprising outer labial setae and cephalic setae, additional lateral setae may be present. Amphideal fovea typically round. Buccal cavity funnel-shaped. Spicules short or elongated. gubernaculum without apophyses. Tail conical or conico-cylindrical.	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547507F67A8DFFF18FEF08963.taxon	description	(Figures 1 – 2, Table 1)	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547507F67A8DFFF18FEF08963.taxon	materials_examined	Type material. Holotype: one male on slide Sanya 01, Paratypes: two males and one juvenile on slide Baimajing 04. Type locality and habitat. Holotype sampled in sublittoral of Sanya City, Hainan Province (19 ° 54 ′ 09 ″ N, 109 ° 31 ′ 44 ″ E), water depth about 5 m, muddy sediment and 0 – 2 cm section in the corer. Paratypes sampled in the intertidal zone of Baimajing, Hainan Province (19 ° 57 ′ 46 ″ N 110 ° 25 ′ 48 ″ E), muddy sediment and 0 – 2 cm section in the corer.	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547507F67A8DFFF18FEF08963.taxon	etymology	Etymology. The Latin adjective papilla refers to the distinct feature which males have: papilliform supplements.	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547517F66A8DFFD3DFA5C88B3.taxon	description	(Figures 3 – 4, Table 1)	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547517F66A8DFFD3DFA5C88B3.taxon	materials_examined	Type material. Holotype: one male on slide Yelin Bay 01 – 1. Paratypes: two males on slide Yelin Bay 02 – 2. Type locality and habitat. Holotype located in intertidal zone of Yelin Bay, Hainan Province (19 ° 36 ′ 26 ″ N 110 ° 55 ′ 38 ″ E), muddy sediment and 0 – 2 cm section in the corer. Paratypes were all located in 2 – 5 cm section in the corer.	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
6539879547517F66A8DFFD3DFA5C88B3.taxon	etymology	Etymology. The Latin adjective fluctus refers to a distinct feature of the species: the double-curved spicules.	en	Huang, Mian, Xu, Kuidong (2024): Two new species of Promonhystera Wieser, 1956 (Nematoda: Monhysterida: Xyalidae) from the South China Sea. Zootaxa 5399 (2): 130-140, DOI: 10.11646/zootaxa.5399.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5399.2.2
