Rhoenanthus (Potamanthindus) obscurus Navas , 1922

Kwanboon, Sedtawut, Sartori, Michel & Boonsoong, Boonsatien, 2021, Behningiidae and Potamanthidae (Insecta, Ephemeroptera) in Thailand, ZooKeys 1067, pp. 57-82 : 57

publication ID	https://dx.doi.org/10.3897/zookeys.1067.72779
publication LSID	lsid:zoobank.org:pub:8DB9C8FE-9DF7-438D-92BA-4B40E81F5DE1
persistent identifier	https://treatment.plazi.org/id/C0F8D3C4-3C5B-57E1-9004-14B00792A55C
treatment provided by	ZooKeys by Pensoft
scientific name	Rhoenanthus (Potamanthindus) obscurus Navas , 1922
status

Treatment

Rhoenanthus (Potamanthindus) obscurus Navas, 1922

Figures 10C, D View Figure 10 , 11C View Figure 11 , 14 View Figure 14 , 15 View Figure 15

Materials examined.

1 female imago (reared) and 1 male imago (reared), Thailand, Chiang Mai province, Mae Ping river, Elely Cafe , 19°04'08.4"N, 98°56'28.8"E, 15.XI.2020, S. Kwanboon leg. (ZMKU) GoogleMaps .

Diagnosis.

The larvae of Rhoenanthus obscurus can be distinguished from those of other Rhoenanthus (Potamanthindus) species based on the following characteristics: i) medium-sized body (12-17 mm), ii) mandibular tusks arched inward about 28° (angle measurement as shown in Fig. 10D View Figure 10 ), iii) length of mandibular tusks ca 0.7-0.8 × length of the head, and iv) length of foretibiae ca 1.32-1.49 × length of the forefemora and about 2.55-3.02 × length of the foretarsi (Fig. 11C View Figure 11 ) ( Bae and McCafferty 1991; Nguyen and Bae 2006).

Distribution.

Chiang Mai province.

Remark.

The larva of R. obscurus was originally described by Gose (1969) as Potamanthus sp. TPA and collected from Thailand (Chantaburi province). Bae and McCafferty (1991) redescribed the larva with material from Mae Ping river, Chiang Mai province. In this study, we found this species in the same river as in the previous study. Our specimens were reared in the laboratory and successfully raised to the imago stage.