Hawaiian-fauna
Guides
Pseudisotoma
Pseudisotoma is a genus of springtails (Collembola) in the family Isotomidae, established by Handschin in 1924. Members of this genus are small, soil-dwelling hexapods found across diverse geographic regions including Arctic, European, Caribbean, Southeast Asian, and Hawaiian localities. As part of the diverse Isotomidae family, they contribute to decomposition processes in their habitats.
Theridion
tangle-web spiders
Theridion is a large genus of tangle-web spiders (family Theridiidae) with nearly 600 described species distributed worldwide. The genus has historically served as a wastebasket taxon for theridiid species lacking a colulus that did not fit into other genera. Notable species include T. grallator, the Hawaiian happy face spider, recognized for its distinctive abdominal color patterns, and T. nigroannulatum, one of few spider species known to live in social groups and hunt cooperatively. Molecular studies have revealed that Theridion as traditionally defined is para- or polyphyletic, with Hawaiian representatives representing at least two independent colonization events from different continental sources.
Udea
celery leaftier moth (U. rubigalis), snout moths
Udea is a genus of snout moths in the subfamily Spilomelinae of the family Crambidae, erected by Achille Guenée in 1845. The genus comprises approximately 216 known species distributed across all continents except Antarctica, with notable diversity in Hawaii where about 41 species are native. Udea is placed in the tribe Udeini and is closely related to the genera Mnesictena, Deana, and Udeoides. The genus has been the subject of taxonomic revision, with former species transferred to other genera including Evergestis, Lirabotys, Achyra, Pyrausta, and Metasia.