Allocapnia rickeri Frison

Nations, Tina M., Stark, Bill P. & Hicks, Matthew B., 2007, The Winter Stoneflies (Plecoptera: Capniidae) Of Mississippi, Illiesia 3 (9), pp. 70-94 : 82-83

Allocapnia rickeri Frison

Allocapnia rickeri Frison,1942 . Holotype male, Big Grand Pierre River, Golconda , Pope County, Illinois.

Distribution. AL, AR, DC, DE, GA, IA, IN, KS, KY, MD, MN, MO, MS, NC, NJ, OH, OK, ON, PA, TN, VA, WI, WV ( Stark & Baumann 2006). Mississippi populations have been reported only in Tishomingo County ( Stark 1979).

Mississippi collection data. ( Fig. 31 ). Tishomingo

Co., Clear Creek, Hwy 72, 4 miles East of Iuka, 34 ° 46’ 40.4” N, 88 ° 08’ 46.6” W, 10 February 1979, B. Stark, P. Hartfield and C. Cooper, 2 ♀; Same location, 8 January 2007, B. Stark, 43 ♂, 6 ♀; Tributary of Bear Creek , Tishomingo State Park , 10 February 1979, B. Stark, P. Lago, P. Hartfield and C. Cooper, 8 ♂, 5 ♀; Tishomingo State Park , 5 February 1992, M. Caterino, 1 ♂ (University of Mississippi); Same location, 16 January 1981, J. Goddard, 1 ♀ ( University of Mississippi) ; Samelocation, 8 February 1986, S. Testa, 1 ♀ ( University of Mississippi) .

Allocapnia rickeri

Male epiproct. Epiproctupper limb long, somewhat spear‐ shaped in dorsal aspect, with no basal angulation ( Fig. 32 ), and the tip bears a small, swollen sectioncovered with shortridges and ashort mesal groove( Figs. 33‐34 ). Posteriorto groovedapical section, a long, low, median ridgeextends formost of upper limb length ( Fig. 32 ), and a broad, shallow, median trough extends forward from base. In lateral aspect, short apical section reflexed slightly downward ( Fig. 33 ) and some ridges have obscure undulations similar to those of A. aurora ( Fig. 35 ).

Maletergal process. The tergal processrises from the 8 th abdominal segment as two knobs covered with scale‐ like tubercles; knobs widely separatedbynotch which extends completelyto base of process ( Fig.36 ). In lateral aspect, anterior margin of process projects somewhat higher than posterior margin.

Female subgenital plate. Abdominal sterna 7 and 8 joined bybridge scleritebut bridgenarrowlynotched on midlateral margins by membrane ( Figs. 37 , 63 ). Apex of subgenital plate truncate and scarcely projecting beyond lateral margins of sternum 8.

Figures

Fig. 31. Distribution of Allocapnia rickeri in Mississippi.

Figs. 32‐37. Allocapnia rickeri, Tishomingo Co., Clear Creek, Hwy 172. 32. Epiproct, dorsal, 33. Epiproct, lateral, 34. Epiproct tip, 35. Detail epiproct tip, 36. Male tergum 8 and dorsal process, 37. Female abdominal sterna 7‐9.

Figs. 63‐66. Female terminalia. 63. Allocapnia rickeri, 64. Allocapnia starki, 65. Allocapnia virginiana, 66. Nemocapnia carolina.