Soyedina amicalola Verdone & Kondratieff,

Verdone, Chris J., Kondratieff, Boris C., DeWalt, R. Edward & South, Eric J., 2017, Studies On The Stoneflies Of Georgia With The Description Of A New Species Of Soyedina Ricker, New State Records And An Annotated Checklist, Illiesia 13 (3), pp. 30-49: 31-36

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Soyedina amicalola Verdone & Kondratieff

sp. n.

Soyedina amicalola Verdone & Kondratieff  , sp. n. Plecoptera  .speciesfil

( Figs. 2-8View FigView FigsView Figs)

Material examined. Holotype ♂, Georgia, Dawson Co., Little Amicalola Creek, Amicalola Falls State Park , N 34.57233, W 84.24107, 9 February 2017, C. Verdone, B. Kondratieff, ( USNM)GoogleMaps  ; Paratypes: Same data as holotype, ♂ ( CSUC) ( SCAN, CSUC_ENT0062195);GoogleMaps  Lumpkin Co., Frogtown Creek , Hwy 19, Desoto Falls Rec. Area, N 34.70649, W 83.91634, 10 February 2017, C. Verdone, B. Kondratieff, ♂ ( CSUC) ( SCAN, CSU_ENT0062194).GoogleMaps  Distribution. USA – GAGoogleMaps 

Etymology. The name amicalola  is a Cherokee word meaning “tumbling waters” and is a reference to the nearby waterfalls where this species was collected. We propose Georgia Forest Fly as the common name for this new species.

Male. Macropterous. Length of forewings 7.8–7.9 mm (n = 3). Length of body 6.4–6.6 mm (n = 3). General body color brown ( Fig. 2View Fig). Head dark brown; U-shaped carina between ocelli. Ocelli reddish. Legs light brown. Wings fumose. Venation typical for genus with A1 and A2 united near wing margin. Gills absent. Cerci membranous and one segmented with a sclerotized nipple-like process on apex. Hypoproct well developed, base covering medial ⅓ of ninth sternum ( Figs. 3View Figs, 6View Figs); apical half articulated, bent dorsad; small lateral projections covered in long setae produced at bend ( Figs. 3, 5View Figs, 6, 8View Figs); apex lightly sclerotized, cylindrical. Vesicle long and thin, 3.5X as long as wide (n = 3); narrow at base; widest at basal ¼; tapering to a narrowly rounded tip ( Figs. 3View Figs, 6View Figs). Paraprocts with two lobes; inner lobes inconspicuous, small, narrow, flattened and lightly sclerotized. Outer lobes large, heavily sclerotized, narrowed at midlength; apical portion expanded posteriorly, mushroom-shaped in profile ( Fig. 5View Figs, 8View Figs). Apical half of proximal side of outer lobes covered in sensilla, giving the appearance of a serrated edge on apical margin ( Figs. 3–5View Figs, 8View Figs). Anterior apex broadly pointed and oriented slightly ventrad. Apex bisected by a thin sclerotized band ( Figs. 5View Figs, 8View Figs). Epiproct typical for genus, asymmetrical with right half larger than left ( Figs. 3, 4View Figs, 6, 7View Figs). Epiproct 2.5X as long as wide (n = 3), when measured from base of ventral sclerite to epiproct apex and widest width. Lateral arms short, extending from the base of ventral sclerites to the base of the sclerotized portion of the dorsal sclerites ( Fig. 7View Figs). Ventral sclerites elongate, width subequal, bearing small teeth on outer margin, tips rounded ( Figs. 4View Figs, 7View Figs). Basal sclerites rectangular ( Fig. 7View Figs). Basal portion of dorsal sclerite darkly sclerotized, triangular shaped, encircling basal cushion. Apical portion of dorsal sclerite lightly sclerotized; open throughout the apical ⅔, which exposes the inner sclerotized structure.

Female. Unknown.

Diagnosis. Soyedina amicalola  is most similar to S. kondratieffi Baumann & Grubbs, 1996  , S. merritti Baumann & Grubbs, 1996  and S. washingtoni ( Claassen, 1923)  which also possess pointed paraproct apices, but can be separated by other details of the paraprocts. Soyedina amicalola  has paraprocts that are mushroom-shaped with sensilla covering the apical half of the proximal side, giving the margin a serrated appearance. Whereas, S. kondratieffi  , S. merritti  and S. washingtoni  do not exhibit the mushroom-shape and serrated appearance. In addition, S. amicalola  is distinguished from S. kondratieffi  by details of the epiproct. The epiproct of S. amicalola  is asymmetrical, in contrast to the nearly symmetrical epiproct of S. kondratieffi  . Ongoing work by Scott Grubbs and Richard Baumann has found that details of epiprocts possess characters useful in grouping eastern Nearctic species of Soyedina  (S. Grubbs, personal communication). Based on these characters,

S. amicalola  is tentatively grouped with S. washingtoni  , S. carolinensis ( Claassen, 1923)  , and S. merritti  , all of which possess relatively straight ventral sclerites and an inner tube-shaped process that is flared apically with the opening mostly centered, not strongly oriented to the left ( Figs. 7, 8View Figs). Soyedina amicalola  is easily distinguished from S. carolinensis  which lacks pointed paraproct apices and is truncate posteriorly.

Additional material examined: Soyedina 

carolinensis  : North Carolina, Buncombe Co., Blue Ridge Parkway, MP 360.3, BLRI, 2 May 2007, J. Robinson, ♂, ♀ ( CSUC);  Haywood Co., ATBI Plot, Cataloochee, GSMNP, 27 March–10 April 2002, P.E. Super, 2♂, ♀ ( CSUC);  ATBI Plot, Purchase Knob, GSMNP, 27 March–10 April 2002, P.E. Super, J. Lowe, ♂ ( CSUC);  Big Creek , GSMNP boundary, 11March 2008, C.R. Parker, ♂ ( CSUC);  Macon Co. , stream at Wayah Crest Campground, Nantahala National Forest , 5 March 1991, R. Baumann, S. Clark, 6♂, 2♀ ( CSUC). Soyedina kondratieffi    : North Carolina, Macon Co., Upper Ball Creek, Coweeta Hydro Lab , (Malaise) 20 March–7 April 1984, A.D. Huryn, ♂ ( CSUC, paratype);  Swain Co. , Andrews Bald, ATBI plot, GSMNP, (Malaise), 16 March–24 April 2001, I.C. Stocks, J. Breeden, 4♂, 4♀ ( CSUC)  ; Tennessee, Sevier Co., Rocky Spur of Roaring Fork, GSMNP, 25 March 1999, B. Kondratieff, ♂ ( CSUC);  Sams Creek , Stn 7, third trail crossing, ca. 100 m below mouth of Chuck Hollow, GSMNP, 1 February 1997, D. Etnier, ♂ ( CSUC);  Mannis Branch, ca. 12 mi. Little River, GSMNP, 25 February 1998, B. Hart, ♂ ( CSUC). Soyedina merritti    : Pennsylvania, Westmoreland Co., Maul Spring, Powdermill Nature Reserve , 19 March 1975, R.W. Baumann, O.S. Flint Jr., J.L. Sykora ♂ ( USNM, holotype). Soyedina sp    .: Georgia, Rabun Co., Greasy Creek, North Germany Rd. , N 34.9146, W 83.41972, 10 February 2017, C. Verdone, B. Kondratieff, ♀ ( CSUC). Soyedina washingtoni  GoogleMaps  : New York, Delaware Co., spring-fed trib. to Emory Brook, Rt. 28 Fleischmanns , N 42.1511, W 74.5224, 27 May 2009, L. Myers, B. Kondratieff, 2♂, 7♀ ( CSUC);GoogleMaps  Essex Co., Seep to North Fork Boquet River flowing off Noble Mountain , N 44.10820, W 73.69780, 9 May 2006, L. Myers, 2♂, ♀ ( CSUC)GoogleMaps  ; Pennsylvania, Center Co., Big Poe Creek, Poe Paddy Dr., N 40.82972, W 77.44472, 29 March 1995, E.C. Masteller, ♂, ♀GoogleMaps  ; Erie Co., Sixmile Creek, H and B Morgan, 7 April 1986, E.C. Masteller, ♂ ( CSUC); trib. to upper Fourmile Creek , 27 April 1987, E.C. Masteller, 3♂, 9♀ ( CSUC); Fourmile Creek , Penn State Behrend Campus , N 42.12139, W 79.95416, 26 April 1981, E.C. Masteller, ♂, 3♀ ( CSUC);GoogleMaps  Forest Co. , Indian Spring, old logging road, N 41.32791, 79.20204, 20 May 2009, S. Harris, ♂ ( CSUC)GoogleMaps  .

Biological notes. The above records for S. amicalola  are the first of this genus from Georgia. The two locations this species is known from are midelevation streams (630–792 m) with nearby seeps. Additional collections from these locations are needed to confirm the identity of the female. Other adult stoneflies collected with the holotype and paratypes were Allocapnia aurora Ricker, 1952  and Leuctra ferruginea (Walker, 1852)  .

New state records


USA, Colorado, Fort Collins, Colorado State University


Smithsonian Institution, National Museum of Natural History


California State University, Chico, Vertebrate Museum