Two new species of the family Comesomatidae (Nematoda, Chromadorea, Araeolaimida) from the South China Sea
- 1College of Agriculture and Biology, Liaocheng University, Liaocheng 252059, China College of Agriculture and Biology, Liaocheng University Liaocheng China https://ror.org/03yh0n709
Abstract
Two new species of free-living marine nematodes found in the South China Sea are described and illustrated. Comesoma gracilissp. nov. is characterized by very slender body (a = 107.7–111); long, thick cephalic setae up to 28 µm in length; large amphidial fovea with 2.5–3 turns (86%–88% of corresponding body diameter); slender, arcuate spicules 4.5 times cloacal body diameter, with distinct transverse striations and a cephalate capitulum; plate-like gubernaculum without an apophysis; and approximately seven small papilliform precloacal supplements. This species is the only one among all known congeners with a de Man ratio a exceeding 107. Paracomesoma sinicasp. nov. is characterized by its relatively slender body (a = 123–148); long, thick cephalic setae up to 25 µm in length; spiral amphidial fovea with 2.5 turns; buccal cavity cylindrical with three teeth; slender, arcuate spicules 3.4–3.5 times cloacal body diameter long, with slightly swollen proximal end; plate-like gubernaculum without apophysis; 28–30 papilliform precloacal supplements. The species can be identified from other known species within the genus by a very slender body (a = 123–148) and relatively shorter spicules (79–84 µm). Comparative tables of main morphometric data of valid Comesoma species and Paracomesoma species are given.
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BibTeX
@article{li2026species,
title = {{Two new species of the family Comesomatidae (Nematoda, Chromadorea, Araeolaimida) from the South China Sea}},
author = {Shuhui Li and Lin Liu and Mian Huang},
journal = {ZooKeys},
year = {2026},
month = oct,
doi = {10.3897/zookeys.1295.204242},
url = {https://doi.org/10.3897/zookeys.1295.204242},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Two new species of the family Comesomatidae (Nematoda, Chromadorea, Araeolaimida) from the South China Sea
AU - Shuhui Li
AU - Lin Liu
AU - Mian Huang
PY - 2026
DA - 2026/10/23
JO - ZooKeys
DO - 10.3897/zookeys.1295.204242
UR - https://doi.org/10.3897/zookeys.1295.204242
AB - Two new species of free-living marine nematodes found in the South China Sea are described and illustrated. Comesoma gracilissp. nov. is characterized by very slender body (a = 107.7–111); long, thick cephalic setae up to 28 µm in length; large amphidial fovea with 2.5–3 turns (86%–88% of corresponding body diameter); slender, arcuate spicules 4.5 times cloacal body diameter, with distinct transverse striations and a cephalate capitulum; plate-like gubernaculum without an apophysis; and approximately seven small papilliform precloacal supplements. This species is the only one among all known congeners with a de Man ratio a exceeding 107. Paracomesoma sinicasp. nov. is characterized by its relatively slender body (a = 123–148); long, thick cephalic setae up to 25 µm in length; spiral amphidial fovea with 2.5 turns; buccal cavity cylindrical with three teeth; slender, arcuate spicules 3.4–3.5 times cloacal body diameter long, with slightly swollen proximal end; plate-like gubernaculum without apophysis; 28–30 papilliform precloacal supplements. The species can be identified from other known species within the genus by a very slender body (a = 123–148) and relatively shorter spicules (79–84 µm). Comparative tables of main morphometric data of valid Comesoma species and Paracomesoma species are given.
SN - 1313-2989
SN - 1313-2970
ER -