Neaviperla forcipata Ricker

Baumann, Richard W. & Lee, Jonathan J., 2014, Neaviperla Is A Valid Stonefly Genus In North America (Plecoptera: Chloroperlidae), Illiesia 10 (9), pp. 80-87 : 80-84

Neaviperla forcipata Ricker

( Figs. 1-18 )

Alloperla forcipata Neave 1929:160 . Holotype ♂ (Canadian National Insect Collection), Lake Edith , Jasper National Park, Canada

Alloperla (Neaviperla) forcipata : Ricker, 1943:142.

Neaviperla forcipata : Illies, 1966:448.

Suwallia forcipata : Alexander & Stewart, 1999:202. Suwallia forcipata : Stewart & Stark, 2002:280.

Suwallia forcipata : Stark et al. 2012:11.

Suwallia forcipata : Stewart and Stark in Merritt et al. 2008

Suwallia forcipata : DeWalt et al. 2014

Material examined. CANADA: Alberta, Minnewanka Creek, passing through lower bank head, Banff National Park, 22 VIII 1969, C.M. Yarmoloy, 1♂, 1♀ (BYUC); Stoney Creek, Banff National Park, 22 VIII 1969, C.M. Yarmoloy, 2♀ (BYUC). British Columbia, Babine River, Kisgegas, 21 VIII 1952, W.E. Ricker, 3♂, 6♀ (CNCI); Chilliwack River, Vedder Crossing, 16-IX-4-X-1937, W.E. Ricker, 31♂, 31♀ (CNCI); Chilliwack River, Chilliwack River Provincial Park, 26 VIII 1991, J. Myack, 6♂, 3♀ (CSUC); Frost Creek, Cultus Lake, 22 X 1937, W.E. Ricker, 4♂, 40♀ (CNCI); creek near Garabaldi Station, 27 IX 1964, W.E. Ricker, 1♀ (CNCI); creek at mile 20, N Hazelton, 20 VIII 1952, W.E. Ricker, 4♂ (CNCI); Kitimat River, Hwy 37, 30 km N Kitimat, 1 I 2000, W.N. Mendel, 1♀ (BYUC); Kleanza Creek, near Terrace, 18 VIII 2008, W.M. Jessop, 1♂ (BYUC); Upper Pitt River, Alvin, 23 IX 1938, W.E. Ricker, 1♂, 6♀ (CNCI); Ritchie Creek, Cassiar Hwy, mi 128, 10 IX 1985, R.L. Botorff, 1♂, 7♀ (RLBC); Skeena River, 14 IX 2005, T. Bansak, 2♀ (UMBS); Telegraph Creek, Trapper Lake Horse Camp, 22 VIII 1959, J. Ricker, 1♂ (CNCI); Waukwash River inlet, Owikeno Lake, 12 X 1956, D. Foskett, 1♀ (CNCI). Yukon, Blackstone River, km 141, Demster Hwy, 11 VIII 1980, R.J. Cannings, 1♂ (SMDV); Canol Road, km 154, 61° 34’N 133°05’W, 28 VII 1997, B. Marshall, 1♂ (ROME); Rose River, Rose Lake, 61° 35’N 133° 05’W, 28 VII 1981, C.S. Guppy, 1♀ (SMDV); 7 km E Rancheria, 60° 04’N 130° 29’W, 5 VIII 1981, C.S. Guppy, 1♂ (SMDV); Starr Creek, 61° 46’N 131° 51’W, 3 VIII 1981, C.S. Guppy 1♂ (SMDV). UNITED STATES: Alaska, Athel Creek, Glenn Hwy, MP 264.5, 11 VIII 1954, C.P. Alexander, 1♀ (USNM); Barr Creek, Seward Peninsula, 70 mi N Nome, 8 VIII 1982, R.L. Newell, 2 larvae, (BYUC); Bear River, Bear Lake, Alaska Peninsula, 4 VIII 1958, J.D. Fiske, 5 larvae (USNM); Same locality, 11 VIII 1958, J.D. Fiske, 1 larva (USNM); creek near Black Lake, Hwy 98, 2 mi N Skagway, 59° 30’N 135°16’W, 21 VIII 2002, Baumann, Huntzinger & Clark, 1♂ (BYUC); Cold Bay, 24 VII 1958, C.H. Lindroth, 2♂, 1♀ (USNM); Granite Creek, Anchorage, 8 IX 1966, K.M. Sommerman, 4♂, 21♀ (USNM); Indian River, near Sitka, 14 IX 2009, G.M. Smith, 1♂, 1♀ (BYUC); Same locality, 13 IX 2010, G.M. Smith, 3♀ (BYUC); Indian River, Sitka National Historic Park, 28 VII 2010, G.M. Smith, 5♂, 5♀ (BYUC); Indian River, Tongass National Forest, 13 VIII 2010, G.M. Smith, 16♂, 10♀ (BYUC); Kwethluk River, Yukon Delta, 17 VIII 2011, Z.J. Crete, 1♂ (ZJCC); Kwethluk River, 22 VIII 2012, Z.J. Crete, 11♂, 9♀ (ZJCC); Same locality, 1 IX 2012, Z.J. Crete, 3♂, 18♀ (ZJCC); Montana Creek, 3 mi N Auke Bay, 21 VIII 2011, R.L. Bottorff, 8♂, 6♀ (RLBC); Montana Creek, near rifle range, Juneau, 10 VIII 1998, J. Hudson, 29♂, 26♀ (BYUC); Same locality, 30 VIII 2011, J. Hudson, 1♀ (BYUC); Mount McKinley Park, 17 VIII 1958, C.H. Lindroth, 1♀ (USNM); Orzenoi Bay, opposite Shumigan Island, 26 VII 1957, J.D. Fiske, 10 larvae (USNM); Same locality, 23 VIII 1957 J.D. Fiske, 10 larvae (USNM); Nome, Seward Peninsula, 13 VIII 1958, C.H. Lindroth, 1♂, 5♀ (USNM); Palmer Creek, Anchorage, 9 IX 1966, K.M. Sommerman, 4♀ (USNM); Paxson, 19 VIII 1958, C.M. Lindroth, 5♂, 9♀, 1 larva (USNM); Pullen Creek, Skagway, 10 VIII 2002, K.T. Huntzinger, 21♂, 4♀ (BYUC); same locality, 18 VIII 2002, Baumann, Huntzinger & Clark, 45♂, 35♀ (BYUC); Reid Creek, Reid Falls, Skagway, 19 VIII 2002, Baumann, Huntzinger & Clark, 2♂, 4♀ (BYUC); Russian River, 0.1 mi above confluence Kenai River, 12 IX 2002, M. Floyd, 3♂, 3♀ (MUIC); Salmon Creek, above jct. Gastineau Channel, Juneau, 27-30 VIII 2002, S.M. Clark, 2♂, 5♀ (BYUC); stream entering Gastineau Channel ¼ mi S Salmon Creek, Juneau, 29 VIII 2002, S.M. Clark, 1♂ (BYUC); Skagway River, Skagway, 59° 28’N 135° 18’W, 18 VIII 2002, R.W. Baumann & S.M. Clark, 107♂, 12♀ (BYUC); Same locality, 21 VIII 2002, Baumann, Huntzinger & Clark, 17♂, 3♀ (BYUC); Steep Creek, near Mendenhall Lake, 15 km N Juneau, 12 VIII 1998, J. Hudson, 11♂, 15♀ (BYUC); Tributary, Surprise Lake, Aniakchak National Monument, Alaska Peninsula, 56° 56’N 158° 06’W, Date?, Collector?, 1♀ (SMDV); Taiya River, Chilkoot Trailhead, Dyea, 19-23 VIII 2002, Baumann, Clark & Huntzinger, 68♂, 19♀ (BYUC); ponds near White Pass, above Skagway, 19 VIII 2002, Baumann, Clark & Huntzinger, 24♂, 6♀ (BYUC). Montana, Flathead Co., Avalanche Creek, Avalanche Campground, Glacier National Park, 10 IX 1968, R.W. Baumann & R.L. Newell, 2♀ (BYUC); South Fork Cut Bank Creek, Schildt Road, 8 VIII 1986, B.C. Kondratieff, 3♂ 5♀ (CSUC); Logan Creek, jct. Mac Donald Creek, Glacier National Park, 10 IX 1968, R.W. Baumann & R.L. Newell, 2♂ (BYUC); Mac Donald Creek, above Mac Donald Lake, Glacier National Park, 10 IX 1968, R.W. Baumann & R.L. Newell, 3♂, 5♀ (BYUC); Park Creek, Lake Isabell Trail, 8 VIII 1986, B.C. Kondratieff, 8♂, 3♀ (CSUC). Washington, Jefferson Co., Hoh River, Hoh River Campground, Olympic National Park, 12-IX-2013, J.J. Lee & R.A. Lee, 10♂, 14♀, 57 larvae (BYUC, JJLC); Whatcom Co., Canyon Creek, Mosquito Lake Road, 4 mi E Deming, 12 IX 1993, Kraft & Minakawa, 7♂, 22♀ (BYUC); Devils Creek, Ross Lake, near Newhalem, 2 X 1993, Kraft, Busse & Minakawa, 2♀ (BYUC); Lightning Creek, Ross Lake, near Newhalem, 2 X 1993, Kraft, Moody, Fritz & Kraft, 3♂ 7♀ (BYUC); Middle Fork Nooksack River, 8 mi E Van Zandt, 1 IX 1993, Kraft, Sammeth & Minakawa, 1♂, 1♀, 44 larvae (BYUC); North Fork Nooksack River, 9 X 1966, K. Vander Mey, 1♂, 3♀ (BYUC).

DISCUSSION

The following characters illustrate the distinctive differences which serve to separate Neaviperla as a genus in the family Chloroperlidae and to add characters useful in diagnosis.

Adult. A distinct sclerotized line is present on the meso and meta thorax that intersects the center of the large U-shaped mark at the base of the segment. This appears as a W in contrast to the U commonly seen in Suwallia and makes it easy to separate adults quickly. Male. Five basal segments of cerci modified into clasper-like structures ( Figs. 1-4 ). First segment very large, curved outward and heavily sclerotized ( Fig.4 ), with large inward directed, triangular–shaped process at base ( Figs. 4, 7 ). Segments 2-5 smaller, forming stout inward pointing lobes, sharp apically, and bearing many large setae, which cover irregular grooves ( Figs. 4, 7 ). Ninth segment enlarged, about length of segments 7 and 8, tergum covered by large plate-like structure ( Figs. 3, 8 ), base broadly rounded, tapered to narrow pointed tip, which extends anteriorly to segment 8 ( Figs. 3, 7 ). Lateral margins of tergum 10 formed into inward curved lobes, bluntly truncate apically, with irregular grooves, bearing few long hairs near base, with narrow patch of shorter hairs near apex ( Fig. 6 ).

Aedeagus. Stout and capped by dorsal medial hump, when recurved, composed of densely compacted hair-like structures. Aedeagal base with pair of sclerotized hook-like processes that are visible through the ventral cuticle of sternum 9. Processes composed of numerous flat sclerotized tubercles that join together to form a comma-shaped structure ( Fig. 9 ).

Female. Cerci with first segment elongate, much longer than remaining segments and slightly concave inwardly ( Fig. 10 ).

Larvae. Head and prothorax heavily covered with long hairs ( Figs. 11, 12 ). Basal cercal segment of mature larvae long, with whorl of stout setae that is not associated with segment margins ( Fig. 15 ).

Egg. Collar with two layers and chorion smooth.

Figures

Figs. 1-2. Neaviperla forcipata, Terminalia: 1. Male, dorsal. 2. Male, lateral.

Figs. 3-10. Neaviperla forcipata, Alaska. Male: 3. Taiya River, Terminalia, dorsal. 4. Skagway River, Terminalia, cerci, anterior. 5. Indian River, Epiproct and 10th tergal lobes. 6. Indian River, Right Tergal Lobe. 7. Taiya River, Terminalia, posterior. 8. Taiya River, Terminalia, lateral. 9. Indian River, Aedeagus, recurved, dorsal. Female: 10. Taiya River, Terminalia, cerci and subgenital plate, ventral.

Figs. 11-18. Neaviperla forcipata, Hoh River, Washington. Larvae: 11. Head, dorsal. 12. Pronotum. 13. Mesnotum and metanotum. 14. Abdomen, dorsal. 15. Cerci and abdominal base. 16. Mesosternum. 17. Mandible. 18. Leg.