Parabathyesola, Kim & Kim & Lee, 2025

Genus Parabathyesola gen. nov.

Etymology.

The generic name alludes to the close relationship of the new genus with the genus Bathyesola . Gender: feminine.

Diagnosis.

Esolinae . Body subcylindrical, slightly depressed, with inconspicuous demarcation between prosome and urosome, usually flexible dorsally; integument on all body somites reticulated except for caudal rami. Rostrum prominent, defined at base, with one pair of dorsal sensilla. Cephalothoracic shield bell-shaped. Free pedigerous somites gradually tapering posteriorly. P 5 - bearing somite with remarkably boarder posterior half. Genital double-somite completely fused ventrally, with bilateral constriction and dorsal transverse suture. Genital double-somite and first free abdominal somite with posteriorly extended pleurotergites. Caudal rami distinctly separated from each other, elongate, with seven setae; set of setae I and II located at distal one-fourth of lateral margin; setae IV and V with fracture planes.

Antennule six-segmented, elongate, with aesthetasc on fourth and sixth segments in female; first segment with one small spinous outer projection; seven-segmented, subchirocerate in male, with geniculation between fifth and sixth segments, aesthetasc on fifth and seventh segments. Antenna with allobasis bearing one abexopodal seta; exopod one-segmented, with four setae. Mandible with well-developed coxa; gnathobase with several teeth and one serrate seta; palp two-segmented; basis with two distal setae; exopod represented by one seta; endopod with one lateral and two distal setae. Maxillule with well-developed arthrite, with one anterior seta; endopod one-segmented, with two distal setae. Maxilla with robust syncoxa bearing three endites; allobasis drawn out into stout claw; endopod very small with three setae. Maxilliped subchelate; syncoxa with two setae; claw-like endopod accompanying one small seta and one denticle.

P 1 – P 4 with wide and narrow intercoxal sclerites. P 1 with elongate protopods; exopod three-segmented, extending midlength of ENP 1; EXP 1 and EXP 2 with outer spine; EXP 3 with two outer spines and two geniculate distal setae; endopod prehensile, two-segmented; ENP 1 elongate, unarmed; ENP 2 small, with one claw and one delicate seta. P 2 – P 4 with rectangular coxae, with long outer setae; exopods longer than endopods, three-segmented; endopods two-segmented; P 3 endopod in male three-segmented, with separate and recurved outer spine instead of spinous apophysis. Armature formulae:

P 5 two-segmented; baseoendopod elongate, with outer setophore bearing seta; left and right BENP fused to sclerite in male; endopodal lobe well-developed, with five setae in female, undeveloped and unarmed in male; exopod elongate, with six setae in female and five setae in male; proximal two outer setae on exopod of female displaced in same insertion position.

P 6 represented by two small setae on both sides of genital operculum in female; asymmetrical in male, with one long seta on each side.