Ctenodactylomyia watsoni
Felt, 1915
Sea Grape Gall Midge
Ctenodactylomyia watsoni is a gall midge in the Cecidomyiidae, commonly known as the Sea Grape Gall Midge. It induces galls on sea grape (Coccoloba uvifera), a coastal shrub native to tropical and subtropical regions of the Americas. The species is well-documented through iNaturalist observations, with over 790 records, indicating it is relatively common and readily observed by naturalists in its range. As a gall-forming insect, it manipulates plant tissue to create protected structures for larval development.
Pronunciation
How to pronounce Ctenodactylomyia watsoni: /ktɛ.noʊ.dækˈtɪ.loʊˌmaɪ.ə ˈwɒt.sə.naɪ/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
The is small, as is typical for Cecidomyiidae, but specific diagnostic features distinguishing C. watsoni from are not well-documented in accessible literature. The induced galls on sea grape leaves are the most reliable indicator of this ' presence. Gall —shape, size, and location on leaf tissue—may provide distinguishing characteristics from other gall midges affecting the same .
Habitat
Coastal where sea grape (Coccoloba uvifera) grows, including beach dunes, coastal hammocks, and shorelines in tropical and subtropical regions. The plant tolerates salt spray and sandy soils, limiting the to maritime environments.
Distribution
Ranges throughout the distribution of its plant Coccoloba uvifera: Florida (USA), the Bahamas, Caribbean islands, and coastal regions of Central and South America. GBIF and iNaturalist records confirm presence across this broad tropical and subtropical coastal zone.
Diet
Larvae feed on tissue within galls induced on sea grape (Coccoloba uvifera) leaves. The specific nutritional relationship—whether the larvae consume plant tissue, gall tissue, or associated fungi—has not been explicitly documented for this .
Host Associations
- Coccoloba uvifera - Sea grape; gall formation documented on leaves
Behavior
Induces gall formation on sea grape leaves. Larvae develop within these galls, which provide protection and nutrition. and patterns are not documented.
Ecological Role
As a gall inducer, it modifies plant tissue, potentially affecting leaf function and plant growth. Its role in coastal —whether as prey for , , or other interactions—has not been studied.
Human Relevance
Of minor economic or horticultural concern; sea grape is occasionally used in landscaping, and heavy gall may reduce aesthetic value. The serves as an accessible subject for natural history observation and citizen science documentation.
Similar Taxa
- Other Ctenodactylomyia species in the same may induce similar galls on related or co-occurring plants; differentiation requires gall and plant examination, and potentially morphological analysis.
- Other Cecidomyiidae on CoccolobaMultiple gall midge may attack sea grape; accurate identification relies on gall characteristics and confirmed .