Description and Drumming of Susulus, a New Genus of Stonefly (Plecoptera: Perlodidae) from California
| Autor: | Richard L. Bottorff, Kenneth W. Stewart, Allen W. Knight |
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| Rok vydání: | 1989 |
| Předmět: | |
| Zdroj: | Annals of the Entomological Society of America. 82:545-554 |
| ISSN: | 1938-2901 0013-8746 |
| DOI: | 10.1093/aesa/82.5.545 |
| Popis: | Isogenus (Chernokrilus) venustus Jewett is removed from Chernokrilus and placed in the new monotypic genus Susulus based on the study of adults, nymphs, eggs, and drumming signals. Male Susulus have an epiproct with frontal and caudal sclerites extending to a slightly inflated apex that is covered with scalelike setae, have pointed lateral stylets shorter than the epiproct, and lack a distinct sternal lobe on abdominal segment 7. Susulus nymphs are unique among perlodine genera because they have the combination of longitudinally banded abdominal terga, long submental gills, and no dorsal fringe of cercal hairs. Nymphal laciniae have the subapical tooth located far forward, have stout, peglike setae on a knob below the subapical tooth, but lack marginal and submarginal rows of setae. The oval eggs have a triangular cross section and an anteriorly projecting collar. The predominant male drumming call consists of 1-3 groups of bi-beats, and its pattern and time intervals are unique among the presently known drumming behavior of Perlodidae. Adults and nymphs will reach Hydroperla in existing keys but differ from this genus in the male epiproct and nymphal morphology. Susulus is placed within the Perlodini because males lack a distinct sternal lobe on abdominal segment 7; nymphal laciniae have an anteriorly located subapical tooth, below which is a low knob with a setal tuft; and the oval eggs are triangular in cross section and have an anteriorly projecting collar. |
| Databáze: | OpenAIRE |
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