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The type species of Misumenops, Misumena maculissparsaKeyserling, 1891 from Brazil is redescribed from its type material. A closely related, but widely confused species, Misumenops pallidus (Keyserling, 1880) (♂♀) from Bolivia and eastern Brazil to northern Argentina, is redescribed and compared with the type species. The revised concept of Misumenops is briefly discussed and its differences from the Eurasian Ebrechtella tricuspidata (Fabricius, 1775) as well as the North American Mecaphesaasperata (Hentz, 1847) and Mecaphesaceler (Hentz, 1847) are summarised. Misumenopsguianensis (Taczanowski, 1872) from northern South America, Misumenopsbellulus (Banks, 1896) from Florida and the Caribbean islands, Misumenopstemibilis (Holmberg, 1876) from southern South America, and Misumenopsvariegatus (Keyserling, 1880), comb. n. ex Misumena from Peru are redescribed. Lectotypes are designated for DiaeapallidaKeyserling, 1880 (♀), MisumenapallensKeyserling, 1880 (♀) and Misumenamaculis-sparsaKeyserling, 1891 (♂). A female neotype is designated (from recent material) for XysticustemibilisHolmberg, 1876 and its senior (but homonymous) synonym ThomisuscinereusNicolet, 1849. The six confirmed Neotropical species of the genus Misumenops are listed, with four species in the maculissparsus-group: M.maculissparsus, M. pallidus,M. guianensis and M.bellulus, the last being the only species of Misumenops within the USA (Florida); the M. temibilis- and M. variegatus-groups are both monotypic, but are confirmed as members of the newly diagnosed Misumenops.MisumenaexanthematicaHolmberg, 1876 from Patagonia and MisumenoidesnicoletiRoewer, 1951 as a nomen novum for ThomisuscinereusNicolet, 1849 are synonymised with Misumenopstemibilis (Holmberg, 1876). The junior secondary homonym Misumenopsvariegatus Mello-Leitão, 1917 is regarded as a nomendubium. The resurrected genus MisumessusBanks, 1904 is diagnosed and the resurrection of Runcinioides Mello-Leitão, 1929 is confirmed, leading to the revalidated combinations Runcinioidesargenteus Mello-Leitão, 1929, R. pustulatus Mello-Leitão, 1929, R. souzaiSoares, 1942, and R. litteratus (Piza, 1933), all comb. n. ex Misumenops. The synonymisation of Metadiaea Mello-Leitão, 1929 with Misumenops is not accepted. Misumenopspallidus sensu Rinaldi (1983) from Brazil is transferred to the still unrevised “Misumenops” pallens-group. The monotypic genus ChorizopsisSimon,
Only a few studies of harvestman prey have dealt with food preference, consumption rate and the value of different food types. This study seeks to clarify these aspects in the non-specialist harvestmen Rilaena triangularis, Oligolophus tridens and Nemastoma lugubre. Food quality was tested with adult R. triangularis, while all three species were used in food preference experiments. The harvestmen were offered eight food types: earthworm, slug, plum, turkey meat, Drosophila melanogaster (Diptera), Sitobion avenae (Aphidoidea), Sinella curviseta (Collembola) and Folsomia Candida (Collembola). In the food quality experiment, consumption rate and effects on animal fitness were examined. In the preference experiment, feeding observations and consumption measurements were used to indicate preference. In general there was little agreement between preference, amounts consumed and food value. Drosophila melanogaster and turkey meat were high quality foods, but associated with high consumption rate of the former and low consumption rate of the latter. Slugs, earthworms, aphids and plum were low-quality foods, though O. tridens and N. lugubre ate surprisingly high amounts of plum. The low quality of slugs is due to pre-ingestive effects, that of earthworms to post-ingestive effects, while the value of S. avenae was limited by both. There is a general similarity between harvestmen and other generalist predators in the value of different food types.
The natural prey of the spider Tibellus macellus Simon, 1875 was studied in a meadow in the subtropical zone of Azerbaijan. The percentage of specimens of T. macellus found while feeding was unusually high for cursorial spiders (15.6%). There was no statistically significant difference in the percentage of feeding specimens between males and females and immatures. The investigation has shown that T. macellus is a Polyphagic predator feeding on a wide range of prey, with representatives of six arthropod orders found in its diet. The primary food of T. macellus was aphids, which accounted for over half of the total prey (53.1%). The only other considerable prey components were leafhoppers and dipterans (12.5% and 18.7% respectively). The length of prey killed by T. macellus ranged between 0.50 and 8.25 mm (mean 2.55 mm) and constituted from 7.1 to 163.6% (mean 39.5%) of the length of their captors. Most frequently taken were small arthropods not exceeding half the length of the spiders, which accounted for 77.8% of the total prey.