Perlesta adena Stark, 1989

Grubbs, Scott A. & Dewalt, R. Edward, 2018, Perlesta armitagei n. sp. (Plecoptera: Perlidae): More cryptic diversity in darkly pigmented Perlesta from the eastern Nearctic, Zootaxa 4442 (1), pp. 83-100 : 84-85

Perlesta adena Stark, 1989

Adena Stone

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:1240

( Figs. 1 & 11 )

Perlesta adena Stark 1989:277 . Holotype ♂ ( USNM), Stillwater River , Miami Co., Ohio.

Perlesta adena: Stark 2004:90

Distribution. USA: IN, KY, OH, TN ( DeWalt et al. 2018)

Remarks. Males and females of P. adena have a dark head mask ( Figs. 1a‒1f ) that is superficially similar to P. xube ( Figs. 2a‒2e ), but easily distinguished from sympatric populations of P. armitagei sp. nov. from Indiana, Kentucky, and Ohio ( Figs. 6a‒6f ). Published line drawings of the aedeagi of P. adena ( Stark 1989, his Fig. 76, Stark 2004, his Figs. 273‒274) and P. xube ( Stark and Rhodes 1997, their Fig. 6 , Stark 2004, his Figs. 370‒371) make it easy to differentiate between males of these two species.

Females of P. adena and P. xube are difficult to separate due to subtle characteristics of their subgenital plates ( Stark 2004). Eggs are likewise superficially too similar in appearance even with SEM to differentiate to species ( Stark 2004, his Fig. 7.400 for P. adena and Fig. 7.404 for P. xube ).

Perlesta adena and P. xube overlap in distribution mainly in Ohio ( Fig. 11a ). Perlesta adena is distributed in the lower Ohio River, Cumberland River, and Tennessee River basins plus a few Lake Erie drainages in northern Ohio ( Fig. 11a ).

Figures

FIGURE 1. Perlesta adena, a–b, Indiana, West Fork Tanners Creek; c–d, Kentucky, Little Trammel Creek; e–f, Tennessee, Rocky Creek. a, c, e, male, head + pronotum, dorsal profile; b, d, f, female, head + pronotum, dorsal profile.

FIGURE 2. Perlesta xube, a–b, Illinois, Little Saline River; c–d, Nebraska, Cherry Creek (paratypes); 11, Ohio, Pee Pee Creek. a, c, e, male, head + pronotum, dorsal profile; b, d, female, head + pronotum, dorsal profile.

FIGURE 6. Perlesta armitagei sp. nov. a–b, Ohio, Deer Creek; c–d, Indiana, Blue River; e–f, Kentucky, Russell Creek; g–h, Pennsylvania, French Creek; a, c, e, g, male, head + pronotum, dorsal profile; b, d, f, h. female, head + pronotum, dorsal profile.

FIGURE 11. Distribution maps of Perlesta based on material examined during this study. a, P. adena, P. browni, P. cinctipes, and P. xube; b, P. armitagei sp. nov. The record from northern West Virginia (red circle; Tarter & Nelson 2006) is conditional since that material was not available for study. The type locality is represented by the purple circle.