Etainia
Beirne, 1945
Etainia is a of minute in the , established by Beirne in 1945. It was formerly treated as a subgenus of Ectoedemia but has been elevated to generic status. The genus contains distributed across North America and Europe, with that are and on . At least two North species are known, including Etainia thoraceleuca, which feeds on Ericaceae.
Pronunciation
How to pronounce Etainia: /ɛˈtaɪniə/
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Habitat
Members of this occupy diverse including oak-juniper-pine woodlands, low Pinus ponderosa forest on ridges, alvar grasslands, and landscaped areas with cultivated plants. Specific habitat associations depend on the distribution of host Ericaceae .
Distribution
North America (USA: California, Arizona; Canada: Ontario) and Europe (Denmark, Norway; Vermont, USA records from GBIF). The has a transatlantic distribution with in both the Nearctic and Palearctic regions.
Diet
of at least one (E. thoraceleuca) feed on Arbutus and Arctostaphylos species (Ericaceae), making short leafmines before continuing feeding in stems and branches. Diet of other species in the is not documented in available sources.
Life Cycle
In E. thoraceleuca: laid on plants; larval development through four ; initial feeding as followed by stem and branch boring; in approximately 5 cm beneath the duff surface, usually between fragments of two dead leaves; . details for other Etainia are not documented.
Behavior
of at least one are attracted to light and collected using light traps. of E. thoraceleuca exhibit a two-phase feeding : initial leafmining followed by stem boring, causing shoot dieback in plants. A trap method using infested Arbutus 'Marina' plants with funnel and enclosures has been used to collect adults.
Ecological Role
; some act as pests of cultivated trees in nurseries and landscaping. The stem-boring of can cause significant damage to planted Arbutus trees.
Human Relevance
E. thoraceleuca causes in nurseries and to planted ornamental trees in Sonoma and Marin Counties, California. The has been accidentally to new areas via cultivated material.
Similar Taxa
- EctoedemiaFormerly contained Etainia as a subgenus; separation based on morphological and molecular characters, with Etainia now recognized at generic rank
- StigmellaAnother nepticulid with leafmining ; requires examination of and for separation