Nannopus Brady, 1880

Vakati, Vinod & Lee Wonchoel, 2017, Five new species of the genus Nannopus (Copepoda: Harpacticoida: Nannopodidae) from intertidal mudflats of the Korean West Coast (Yellow Sea), Zootaxa 4360 (1), pp. 1-66 : 5

Genus Nannopus Brady, 1880

Redefined diagnosis. Body fusiform, ovate or cylindrical, and dorsoventrally depressed somites with 2 egg sacs. Rostrum fused at base, prominent, deeply recurved downwards, anterior margin densely hirsute. Anal somite with pair of dorsal sensilla, with or without pair of dorsal pore, and anal operculum with dense carpet of setules. Caudal rami small, rectangular, or sub-rectangular, and with 7 setae. Antennule 5-segmented in female and 6 to 7- segmented in male. Antenna with at most 2 abexopodal setae on allobasis, and exopod 1-segmented. Mandible uniramous, exopod and endopod fused, and with 4 to 5 setae. Maxillule praecoxal arthrite with at most 8 sturdy spines/setae and 1 to 2 pinnate recurved setae at distal margin. Maxillary syncoxa with 2 endites bearing 3 elements, allobasis with claw and 1 accompanying seta, and endopod incorporated into basis represented by 2 setae. Maxilliped syncoxa with 1 distal seta, endopod 2-segmented, and distal segment with 1 claw and 2 accessory setae at proximal region. P1–P4 exopod 3-segmented. P1–P3 endopod at most 2-segmented and P4 endopod 1- segmented. P3 enp-2 with distal apophysis in males. P4 exp-3 with or without inner subdistal pectinate seta. P5 exopod separated or fused to baseoendopod in female, always fused in males, both baseoendopods confluent or separated in females, and always confluent in males. P5 exopod with 4–5 setae, endopod with 3–4 setae. P6 with 1 seta set on peduncle in female, and 2–3 setae in males.