VOLUME FIFTEEN: 2019
The larva of Perlesta adena Stark, 1989 (Plecoptera: Perlidae).
Bill P. Stark and Audrey B. Harrison
Illiesia 2019 15(04):79-82. Figures 1-3, 14 references (pp.:81-82.) (9 August 2019)
Only ten of the 32 proposed Nearctic Perlesta species are known in the larval stage. In this study an additional association and description was made for the larva of Perlesta adena Stark, 1989. The pigment pattern of the larva is characterized by a distinct pale M-line on the frons and a series of pale, median spots on abdominal terga 2-10 that comprise a median pale stripe. The larval stage of this species is most similar to that of Perlesta fusca Poulton & Stewart, 1991, and P. xube Stark & Rhodes, 1997, among described species.
Keywords: Plecoptera, Nearctic, Perlesta adena, larval description
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A new species of Zealeuctra Ricker, 1952 (Plecoptera: Leuctridae) from North Carolina, U.S.A.
Chris J. Verdone, Steven R. Beaty, Victor B. Holland & Boris C. Kondratieff
Illiesia 2019 15(03):65-78. Figures 1-23, 20 references (pp.:77-78.) (17 June 2019)
The stonefly genus Zealeuctra Ricker, 1952 (Plecoptera: Leuctridae) is reported from North Carolina, U.S.A. for the first time by the new species, Z. uwharrie sp. n. described from the Carolina Slate Belt. The new species is proposed based on details of the male 9th abdominal tergum, epiproct, abdominal sclerotization, and the female 7th sternite. Supporting data includes scanning electron micrographs and color images of all life stages including the adult male and female, larva, and ovum. A distribution map, biological notes and an amended key are also presented.
Keywords: Plecoptera, Leuctridae, Zealeuctra, new species, Carolina Slate Belt, North Carolina
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Two new species of Dictyogenus Klapálek, 1904 (Plecoptera: Perlodidae) from the Jura Mountains of France and Switzerland, and from the French Vercors and Chartreuse Massifs.
Jean-Paul G. Reding, Bertrand Launay, Jacques Le Doaré, Alexandre Ruffoni & Gilles Vinçon
Illiesia 2019 15(02):27-64. Figures 1-93, 62 references (pp.:62-64.) (17 June 2019)
Two new species of Dictyogenus Klapálek, D. jurassicum sp. n., endemic to the Jura Mountains of France and Switzerland, and D. muranyii sp. n., endemic to the French Vercors and Chartreuse Massifs, are described from adult, larva, egg characters and molecular markers. Information on the distribution, ecological preferences and conservation status of these new species is also provided. Identification keys for adults and larvae of Dictyogenus are proposed.
Keywords: stoneflies, Dictyogenus jurassicum, Dictyogenus muranyii, egg morphology, larval morphology, endemism, karstic springs, identification keys
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A review of the genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), and recognition of two new Nearctic capniid genera.
Hannah Jean Broome, Bill P. Stark & Richard W. Baumann
Illiesia 2019 15(01):1-26. Figures 1-72, 1 Table, 25 references (pp.:25-26.) (15 March 2019)
Male epiprocts of five of the six species currently placed in the genus Bolshecapnia Ricker, 1965 were examined with scanning electron microscopy. In addition to the plesiomorphic characters historically used to define the genus (e.g. ventral male vesicle), these species share at least one potentially apomorphic character of the epiproct, a long median groove with a pair of low parallel ridges that extend for most of the epiproct length, but additional epiproct apomorphies emphasize fundamental differences within the group. No new species are proposed, but we recognize two new genera, Eurekapnia gen. n., based on Capnia maculata Jewett, 1954, and Sasquacapnia gen. n., based on Capnia (Bolshecapnia) sasquatchi Ricker, 1965. A modified, partial key is presented to accommodate adults of the new genera, and revised keys are presented for adults of the species of Bolshecapnia and Sasquacapnia.
Keywords: Keywords: Plecoptera, Capniidae, Bolshecapnia, epiproct morphology, scanning electron microscopy, new genera
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