Paraborjinia, Zograf & Semenchenko & Mordukhovich, 2024

Zograf, Julia K., Semenchenko, Alexander A. & Mordukhovich, Vladimir V., 2024, New deep-sea species of Aborjinia (Nematoda, Leptosomatidae) from the North-Western Pacific: an integrative taxonomy and phylogeny, ZooKeys 1189, pp. 231-256 : 231

Paraborjinia gen. nov.

Type species.

Paraborjinia corallicola (Westerman, de Moura Neves, Ahmed & Holovachov, 2021). Type locality: Atlantic Ocean, Labrador Shelf (60.6083°N, 61.7428°W), 426 m depth. Type host: Acanella arbuscula .

Diagnosis.

Parasitic life style. Distinct body pores along the body. Outer labial and cephalic sensilla papilliform, situated in two circles. Amphideal aperture pore-like. Muscular and uniformly cylindrical pharynx. Intestine not modified into trophosome. Hologonic ovaries in females. Presence of caudal glands.

Differential diagnosis.

Within the family Leptosomatidae the new genus differs from all genera except Aborjinia by having and endoparasitic lifestyle and hologonic ovaries. Paraborjinia gen. nov. differs from Aborjinia by the position of cephalic sensitive organs (outer labial and cephalic papilla in two separate circles in Paraborjinia vs outer labial and cephalic papilla in one circle in Aborjinia ). Paraborjinia gen. nov. differs from Aborjinia , Ananus , and Thalassonema by the parasitic adult (vs free-living in Aborjinia , Ananus , and Thalassonema ). Paraborjinia gen. nov. differs from Ananus by the presence of rectum and anus. In addition, in all described species of Aborjinia and Ananus the secretory-excretory system is well developed and consists of two prominent cells while in Paraborjinia the secretory-excretory system was not found.