Sweltsa pisteri Baumann & Bottorff

Stark, Bill P. & Baumann, Richard W., 2007, Sweltsa Yurok (Plecoptera: Chloroperlidae), A New Stonefly From California, U. S. A., Illiesia 3 (10), pp. 95-101 : 95-97

Sweltsa pisteri Baumann & Bottorff

( Figs. 1-6 )

Sweltsa pisteri Baumann & Bottorff, 1997: 346 . Holotype ♂ ( U. S. National Museum). South Caspar Creek , Jackson State Forest , Mendocino Co., California

Material examined. California: Humboldt Co., tributary Mattole River, 4.1 miles E Petrolia, Mattole Road , 20 May 2007, J.J. Lee, 1 ♂, 1 ♀ ( BYU). Humboldt Co., Woods Creek , 1.4 miles W Honeydew, Mattole Road, 20 May 2007, J.J. Lee, 1 ♂, 1 ♀ ( BYU). Lake Co., tributary South Fork Scotts Creek , Hwy 175, mile 2.8, 5 May 2006, J.J. Lee, 1 ♂ ( BYU). Marin Co., Lily Pond , Alpine Lake (Malaise trap), 10 May-9 June 1970, 6 ♂, 6 ♀ ( CNC). Mendocino Co., South Caspar Creek , Jackson State Forest, 18 April 1985, R.L. Bottorff, 1 ♂ ( BYU). Mendocino Co., Jackson State Forest , Caspar Creek, 18 May 1998, B. Stark, C.R. Nelson, S.W. Szczytko, I. Sivec, 16 ♂, 32 ♀ ( BYU, SWS, BPS). Mendocino Co., Irish Gulch Creek , below Hwy 1, 15 April 2005, L.D. Bottorff, 3 ♂, 2 ♀ ( BYU). Mendocino Co., upper Irish Gulch Creek , 1.5 miles E Pacific Ocean, 21 April 2006, L.D. & R.L. Bottorff, 3 ♂, 3 ♀ ( BYU).

Remarks. The epiproct shape for this species is beautifully illustrated in Baumann & Bottorff (1997), however details of epiproct setation were not given. In dorsal aspect, the epiproct has almost parallel sides except for the apex, and in lateral aspect the apical half is expanded but does not exhibit a foot shape as in the other members of the complex. The epiproct tip is rounded and bare but most of the dorsal and lateral surface is covered with a dense pile of setae which extends to the epiproct base, leaving, on either side of the base, an oval bare spot. We provide Figs. 1-5 to permit direct comparisons of these characters with other members of the complex. No eggs were available at the time of the original description, consequently we also add the following brief description of chorionic features.

Egg. Outline oval, collar absent. Length ca. 0.35 mm, width ca. 0.23 mm. Chorion completely punctate with coarse, somewhat irregularly spaced, shallow pits ( Fig. 6 ).

Figures

Figs. 1-6. Sweltsa pisteri (1-5: Irish Gulch Creek, Mendocino Co., CA; 6: Caspar Creek, Mendocino Co., CA). 1. Male terminalia, dorsal aspect, 2. Epiproct, dorsal aspect, 3. Epiproct, lateral aspect, 4. Epiproct apex, lateral aspect, 5. Epiproct base, dorsal aspect, 6. Egg.