Historical-genus
Guides
Alcimosphenus
Alcimosphenus is a genus of long-jawed orb-weaver spiders in the family Tetragnathidae, established by Eugène Simon in 1895. The genus is currently considered doubtful in status, with its taxonomic validity questioned in modern arachnological literature. It is poorly known, with limited published information on its constituent species, biology, or diagnostic characteristics. Most records of this genus are historical, and its species may require taxonomic revision.
Parapergandea
Parapergandea is a genus of phylloxerids (family Phylloxeridae) in the order Hemiptera, established by Börner in 1930. It is currently treated as a synonym of Phylloxera Boyer de Fonscolombe, 1834. The genus was erected to accommodate species resembling Phylloxera but with distinct morphological features, though subsequent taxonomic revisions have subsumed these taxa under Phylloxera. Records attributed to Parapergandea have been reported from Scandinavia (Denmark, Norway, Sweden) and the northeastern United States (Vermont).