Thalera fimbrialis

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Thalera fimbrialis
Thalera fimbrialis Bugac.JPG
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Thalera
Species:
T. fimbrialis
Binomial name
Thalera fimbrialis
Synonyms [1]
List
    • Phalaena fimbrialis Scopoli, 1763
    • Phalaena thymiaria Linnaeus, 1767
    • Geometra bupleuraria Denis & Schiffermüller, 1775

Thalera fimbrialis, the Sussex emerald, is a species of moth of the family Geometridae, found in Europe and across the Palearctic to the area surrounding the Amur River in China. It was described by the Italian physician and naturalist Giovanni Antonio Scopoli in 1763.

Contents

Description

The wingspan is 25–30 mm. The ground colour is green which can fade with increasing lifespan and then assumes yellowish tints. The outer edge of the wings is yellowish, the hair fringes along the edge are alternately white and reddish-brown. The forewing has two white crosslines, the hind wing only a single line as a continuation of the forewing outer line. The hind wing shows a slightly forward corner in the middle, over which there is an indentation. The moth flies from June to August depending on the location.

Larva

Larva overwinter part-grown and when fully grown is long and thin, green with a brownish-red dorsal stripe that is sometimes broken up into a variety of spots. The head is divided in two by a deep cleft in the middle. On the front body segment there are a pair of spikes protruding above the head. During ecdysis, the caterpillar eats the discarded skin, possibly for food value or possibly to remove clues that a predator may use to find the moth. [2] They feed on various woody and herbaceous plants, including,

and probably many other species. [3] [4]

In the UK, this species only inhabits vegetated shingle and primarily feeds on wild carrot, ( Daucus carota ) with late larval instars occasionally found on plants in the ragwort ( Senecio species). [5]

Distribution

Found across Europe and Asia as far as east as China. It is a Red Data Book species in the UK, only breeding in the Dungeness area of Kent and one site in Rye, East Sussex. [6]

Etymology

First described by Giovanni Antonio Scopoli, in his Entomologia Carniolica , published in Vienna in 1763; he named the moth Phalaena fimbrialis. Carl Linnaeus, the Swedish taxonomist, placed most of the moths in the genus Phalaena ; a Greek word used by Aristotle to describe moths. It was later places in the genus Thalera, from thaleros i.e. blooming, fresh, youthful – from the spring-like, green colour of the wings. The specific name fimbrialis means a fringe, which refers to the red-chequered terminal cilia on the wing. [7]

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References

  1. "Thalera fimbrialis (Scopoli, 1763)". Fauna Europaea. Retrieved 27 September 2023.
  2. Leverton, Roy (2001). Enjoying Moths. London: T & A D Poyser. p. 16. ISBN   0-85661-124-7.
  3. Porter, Jim (1997). The Colour Identification Guide to the Caterpillars of the British Isles. London: Viking. p. 27. ISBN   0-670-87509-0.
  4. Waring, Paul; Townsend, Martin (2017). Field Guide to the Moths of Great Britain and Ireland (Third ed.). London: Bloomsbury Wildlife Guides. p. 175. ISBN   978-1-4729-3030-9.
  5. "Sussex Emerald". Butterfly Conservation. Retrieved 2022-02-10.
  6. "Return of the Sussex Emerald | Sussex Wildlife Trust". sussexwildlifetrust.org.uk. Retrieved 2022-02-10.
  7. Emmet, A Maitland (1991). The Scientific Names of the British Lepidoptera. Colchester: Harley Books. pp. 18 & 163. ISBN   0-946589-35-6.