Rhoenanthus coreanus ( Yoon & Bae, 1985 )

Han, Na, Zhang, Min & Zhou, Chang-Fa, 2021, The genus Rhoenanthus Eaton, 1881 in China with the redescription of R hunanensis You & Gui, 1995 (Ephemeroptera: Potamanthidae), Zootaxa 4903 (4), pp. 563-577 : 564

Rhoenanthus coreanus ( Yoon & Bae, 1985)

Figs 1 , 11

Potamanthus nb Imanishi, 1940: 182 (nymph).

Potamanthus coreanus Yoon & Bae, 1985: 95 (adults, Korea).

Rhoenanthus rohdendorfi Tshernova, 1985: 15 (male, from Maritime territory, Russia); Tiunova 1990: 818 (nymph, from Primorye territory, Russia). Synonymized by Bae & McCafferty 1991: 26.

Rhoenanthus coreanus: Bae & McCafferty 1991: 26 ; Kluge 2004: 223.

Rhoenanthus youi: Quan et al. 2002: 257 [nec Rhoenanthus youi ( Wu & You, 1986) , mis-identification].

Diagnosis: According to Bae & McCafferty (1991), the nymphs of this species have larger mandibular tusks and subapical spines than others species in the same subgenus. The penes of males are stout. The distribution restricted to the northeastern part of Asia also contributes to its identification. Female subimago and imago in our collection can be distinguished from other Rhoenanthus (Potamanthindus) species by reddish to brown foreleg except foretarsi I–IV ( Fig. 1 ), crossveins of all wings pigmented with purple-reddish markings, hindwing outer half reddish to brown and costal projection acute; subanal plate shallowly notched.

Distribution: China (Northeast, first record from China), Korea, Russia (Far East) ( Fig. 11 ).

Materials examin ed: 1 ♀ and 1♀ subimago, Songjiang River , Heilongjiang Province, China, collected by Xingyong WU, 26- VII- 1984 .

Figures

FIGURE 1. Female imago of Rhoenanthus coreanus (digital photos).

FIGURE 11. Chinese Rhoenanthus species distribution map.