Entylia carinata

Entylia carinata, commonly known as the keeled treehopper, is a species of treehopper in the family Membracidae. They can be found in Brazil, Panama, Mexico, the United States, and Canada.[1][2][3][4] Keeled treehoppers are often attended by ants which feed on the honeydew they excrete. In return, the ants offer protection from predators.[5] Keeled treehoppers typically feed on plants in the aster family and they are not known to transmit plant diseases and are not considered significant plant pests.[5]

Entylia carinata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Auchenorrhyncha
Family: Membracidae
Genus: Entylia
Species:
E. carinata
Binomial name
Entylia carinata
(Forster, 1771)
Nymph
Carpenter Ant Tending to Keeled Treehoppers

Biology

Life cycle
Keeled Treehopper (Entylia carinata) guarding eggs
Keeled Treehopper (Entylia carinata) guarding eggs

As adults, keeled treehoppers spend the winter months in leaf litter and debris, finally emerging in March.[5] They begin to reproduce and implant their eggs on aster leafs.[5] During this time of year plants produce vulnerable growth and soft tissues which make it an optimal time to embed their eggs.[5] Occasionally the laid eggs cause the leaf to fold over, forming a protected environment for the nymphs to develop in once they hatch.[5]

Behavior

Keeled treehoppers mothers exhibit parental care and spend time protecting their egg masses.[5] They are phloem feeders, and their diet consists of liquids extracted from plants.[6] Plant sap, while a convenient material to feed on, is lacking in many different nutrients including essential amino acids.[7] Because their food source is so nutrient poor, keeled treehoppers rely on gut symbionts in order to supplement their diet.[6]

Host plants

Keeled treehoppers can be found on plants such as asters, baccharis, fleabane, goldenrod, sunflowers, oaks, dogwood, solanum, dahlias, and many more.[5] However, they exhibit a preference for plants in the family Asteraceae.[5]

Geographic distribution

These insects can be found in Canada, the eastern United States, Mexico, Central America, and South America.[4]

Morphology

Keeled treehoppers have unique saddle shaped keels, and are small and brown.[5] The species exhibits sexual dimorphism, females are typically 1/4 of an inch (6.35 mm) long with more pronounced keels while males are smaller, and their keels less noticeable.[5] On occasion, males appear so different that they are misidentified.[5]

Symbiosis

Like many other species in the family Membracidae, keeled treehoppers have ant-tending mutualism.[6] Ants care for both nymphs and adults.[8] The ant species known to live symbiotically with keeled treehoppers are Camponotus ferrugineus, Formica subsericea, Prenolepis imparis, Tapinoma sessile, and Camponotus pennsylvanicus.[8] Ants feed on treehopper honeydew and assist the treehoppers fending off predators and facilitating feeding.[9] Honeydew feeding not only benefits ants, but also prevents nymphs from becoming trapped in the sticky material and sooty molds from growing on the host plants.[9]

See also

References
  1. "Entylia carinata species details". Catalogue of Life. Retrieved 2018-04-05.
  2. "Entylia carinata". GBIF. Retrieved 2018-04-05.
  3. "Entylia carinata Species Information". BugGuide.net. Retrieved 2018-04-05.
  4. "Entylia carinata Overview". Encyclopedia of Life. Retrieved 2018-04-05.
  5. "Keeled Treehopper". NC State Extension Publications. NC State University. Retrieved 8 September 2020.
  6. Mao, Meng; Yang, Xiushuai; Bennett, Gordon (2016). "The complete mitochondrial genome of Entylia carinata (Hemiptera: Membracidae)". Mitochondrial DNA Part B. 1 (1): 662–663. doi:10.1080/23802359.2016.1219629. ISSN 2380-2359. PMC 7800129. PMID 33473588.
  7. Mao, Meng; Yang, Xiushuai; Poff, Kirsten; Bennett, Gordon (June 2017). "Comparative Genomics of the Dual-Obligate Symbionts from the Treehopper, Entylia carinata (Hemiptera: Membracidae), Provide Insight into the Origins and Evolution of an Ancient Symbiosis". Genome Biology and Evolution. 9 (6): 1803–1815. doi:10.1093/gbe/evx134. ISSN 1759-6653. PMC 5533117. PMID 28854637.
  8. Flynn, Dawn; Elliott, Todd F.; Stanley, Allein (2018-11-02). "New host record for Entylia carinata (Forster) (Hemiptera: Membracidae)". Insecta Mundi.
  9. Morales, Manuel A. (2000). "Mechanisms and Density Dependence of Benefit in an Ant–Membracid Mutualism". Ecology. 81 (2): 482–489. doi:10.1890/0012-9658(2000)081[0482:MADDOB]2.0.CO;2. ISSN 1939-9170.

Further reading
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