Rhoenanthus magnificus Ulmer, 1920

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 : 572

Rhoenanthus magnificus Ulmer, 1920

Figs 9 , 11

Rhoenanthus magnificus Ulmer, 1920: 11 , Fig. 9 (male, female, subimago). Types: Male , female, male subimago, Vietnam and China (but the materials from China were renamed as R. youi by Bae & McCafferty 1991: 22–23).

Rhoenanthus magnificus: Ulmer 1926: 100 ; Wu 1935: 249.

Neopotamanthodes lanchi Hsu, 1938: 221 , Figs 44–45 (male, female, types lost); Gui 1985: 91; You & Gui 1995: 127, Fig. 135 (male subimago, female). Synonymized by Bae & McCafferty 1991: 22.

Rhoenanthopsis magnificus: Ulmer 1936: 213 ; You & Gui 1995: 125, Fig. 134 (male, female).

Potamanthellus magnificus: Gui 1985: 92 (mistaken generic placement).

Rhoenanthus (Potamanthindus) magnificus: Bae & McCafferty 1991: 22 , Figs 2 , 84, 102, 120 (male, female).

Rhoenanthus magnificus: Kluge 2004: 223 .

Rhoenanthus (Potamanthindus) magnificus: Nguyen & Bae 2004: 10 , Fig. 1 (nymph description, Vietnam); Nguyen & Bae 2006: 21.

Diagnosis: Male adults of this species can be distinguished from other Rhoenanthus (Potamanthindus) species by relatively longer foretibiae (about 1.4x length of forefemora and about 2.0x length of foretarsi); variously stained markings throughout the forewing; genitalia V-shaped, and slightly notched apically on penes ( Fig. 9 ). The nymphs of this species have relatively shorter bent mandibular tusks, with basal spines only.

Remarks: Ulmer (1920 a) reported male and female adults collected at Chenghu ( China) as Rhoenanthus magnificus . Therefore, this species have been listed and cited by all following Chinese researchers. However, Bae & McCafferty (1991) rechecked these materials and attributed them to R. youi . Types of another synonym of this species, Neopotamanthodes lanchi Hsu, 1938 were lost during the second world war.

Distribution: Vietnam, China (Guizhou, Zhejiang).

Materials examined: 6♀♀, Sanglang Town , Wangmo County, Guizhou Province, China, collected by Changfa ZHOU and Chuanren LI, 16-IX-2000 ; 1♀ subimago, 13-IX-1994; 2♂♂ subimagoes, Libo County, Guizhou Province, China, 6-VII-1994, collected by Yuzhou DU .

Figures

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

FIGURE 2. Nymphal characters of Rhoenanthus hunanensis (digital photos).A. Habitus in dorsal view; B. Head and pronotum of another more mature nymph (dorsal view, showing mandibular tusks); C. Enlarged section of the antenna.

FIGURE 9. Genitalia of Rhoenanthus magnificus subimago.

FIGURE 11. Chinese Rhoenanthus species distribution map.