. Bulletin. Natural history; Natural history. Aug., 1975 Webb Et Al.: Mecoptera of Illinois 261. Fig. 1 1.—Panorpa sp. on herbaceous vegetation. (Photo by W. D. Zehr) Their tipulidlike appearance, single raptorial claw on the tarsus, and pre- daceous habit are three of the most sig- nificant specializations. Although bit- tacids have the bulbous basistyles of most of the Mecoptera, the presence of a four-branched sector vein and the absence of a notal organ suggest that this family's specialization began at an early date. Jurassic fossils of Probit- tacus and Protobittacus (Tillyard 1935) also
. Bulletin. Natural history; Natural history. Aug., 1975 Webb Et Al.: Mecoptera of Illinois 261. Fig. 1 1.—Panorpa sp. on herbaceous vegetation. (Photo by W. D. Zehr) Their tipulidlike appearance, single raptorial claw on the tarsus, and pre- daceous habit are three of the most sig- nificant specializations. Although bit- tacids have the bulbous basistyles of most of the Mecoptera, the presence of a four-branched sector vein and the absence of a notal organ suggest that this family's specialization began at an early date. Jurassic fossils of Probit- tacus and Protobittacus (Tillyard 1935) also suggest early specialization. In the Nearctic Region the Bittacidae are represented by two genera, Bittacus and a wingless form, Apterobittacus. Apterobittacus is monotypic and found only in central California (Fig. 12) except for one doubtful record from southwestern Colorado. Bittacus, the most widespread genus of the Mecop-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
