Tetragonocephala
Crawford, 1914
Species Guides
1- Tetragonocephala flava(Sugarberry Psyllid)
Tetragonocephala is a of jumping plant lice (psyllids) in the Aphalaridae, first described by Crawford in 1914. As a member of Psylloidea, these insects are specialized sap-feeders on vascular plants. The genus is poorly documented in scientific literature, with minimal published information on , associations, or . The name refers to the four-angled characteristic of these insects.
Pronunciation
How to pronounce Tetragonocephala: /tɛˌtræɡənoʊˈsɛfələ/
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Identification
Tetragonocephala can be distinguished from other Aphalaridae by the four-angled (quadrate) shape of the , which gives the genus its name. Members have the general body plan: small size (usually 2-4 mm), membranous wings held roof-like over the body, and enlarged hind adapted for jumping. Specific diagnostic features require examination of genitalia and wing venation patterns, which separate it from closely related genera such as Craspedolepta and Aphalara.
Images
Distribution
Records from iNaturalist indicate observations from North America. The type and description by Crawford (1914) originated from North American material. Specific range boundaries remain undocumented.
Similar Taxa
- AphalaraShares Aphalaridae and similar body form; distinguished by shape (rounded in Aphalara versus quadrate in Tetragonocephala) and differences in male paramere structure.
- CraspedoleptaAnother Aphalaridae with overlapping distribution; Craspedolepta typically show different wing marking patterns and proportions.
- PsyllaBelongs to different (Psyllidae); Psylla generally have more pronounced wing venation and different plant associations.
More Details
Taxonomic history
Crawford established Tetragonocephala in 1914 based on distinctive . The has received limited taxonomic attention since its description, and the number of included remains uncertain. Modern phylogenetic studies of Psylloidea have not comprehensively sampled this genus.
Research gaps
No published studies document plants, stages, or detailed for any Tetragonocephala . The 14 iNaturalist observations represent a substantial portion of available occurrence data, highlighting the need for basic inventory work.