Undulacandona aeolus, Karanovic & Cho, 2017

UNDULACANDONA AEOLUS SP. NOV.

( FIGS 7, 8)

h t t p:/ / z o o b a n k. o r g / u r n:l s i d: z o o b a n k. o r g: a c t: 103776C5-E945-49B8-B547-459E097DEC 16 Holotype: Male, dissected on one slide ( NIBRIV 0000243286 ), shell on SEM stub ( NIBRIV0000243282 ) .

Paratypes: Male, dissected on one slide ( NIBRIV 0000243287 ), shell on SEM stub ( NIBRIV0000243282 ), male with soft parts used for DNA extraction, shell on micropalaeontological slide ( NIBRIV0000243288 ). All examined material collected from the type locality .

Type locality: River interstitial, Wolsong-ri, Jijeongm y e o n, Wo n j u - s i, G a n g w o n - d o, S o u t h K o r e a, 37°22 ʹ 33.7 ″ N 127°51 ʹ 22.6 ″ E, elevation 74 m, 22 May 2015, collector Joo-Lae Cho.

Etymology: The species is named after the Greek ruler of the winds, Aeolus , but the name is shared by three mythical characters (Son of Hellen, Son of Poseidon and Son of Hippotes).

Diagnosis: Shell ornamented with fine stripes, elongated in lateral view. LV and RV subequal. A1 five-segmented; A2 with all three exopodite setae short. Prehensile palps almost symmetrical each basally carrying additional spine-like structure. L7 with subdivided penultimate segment. UR with short and stout ramus and with long claws; posterior seta situated high on the ramus. Hemipenis with lobe ‘a’ lower than lobe ‘h’.

Description: Male. L of shell 1 mm. Greatest H situated around middle L, equalling 40% of L. Valves elongated in lateral view ( Fig. 7A, B). Dorsal margin straight in the middle, slightly inclined towards anterior and much more inclined towards posterior end. Anterior and posterior margins both rounded, anterior wider than posterior. Ventral margin slightly curved. Surface covered with fine stripes ( Fig. 7C, D) and with sensory setae exiting from pores. Pores rimmed. Surface setae of various lengths. Inner calcified lamellae, and line of concrescence narrow ( Fig. 8A, B).

A1 ( Fig. 8C): Same as in U. koreana , posterior margin of the second segment with well-pronounced extension.

A2 ( Fig. 8D): Similar to U. koreana . Aesthetasc Y longer than posterior margin of the first endopodite segment.

Md and Mxl: Same as in the previous species.

Prehensile palps ( Fig. 8F, G): Almost symmetrical. Both with elongated fingers and long subterminal setae. Also, both carrying a spine-like process proximally on the palp.

L6 ( Fig. 8E): Same as in U. koreana , but terminal claw can be curvy.