Phereoeca uterella, known by the vernacular names plaster bagworm[a] and household casebearer[b], is a moth species in family Tineidae.[3][1] It occurs in tropical climates, where it is common in houses, and is presumed native to the Neotropical realm.[4] In the Americas, it has been recorded from Brazil, Guyana, and the southern United States[1] as well as the Virgin Islands and Trinidad,[4] and tentatively identified from Tobago.[4]

Phereoeca uterella
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Tineidae
Genus: Phereoeca
Species:
P. uterella
Binomial name
Phereoeca uterella
(Walsingham, 1897)
Synonyms
  • Phereoeca dubitatrix
  • Phereoeca walsinghami
  • Tineola uterella Walsingham, 1897
  • Tinea barysticta Meyrick, 1927 (but see text)
  • Tinea dubitatrix Meyrick, 1932
  • Tineola oblitescens Meyrick, 1924
  • Tinea pachyspila Meyrick, 1905 (but see text)
  • Phereoeca postulata Gozmány, 1967
  • Tineola walsinghami Busck, 1934

As with other species of its genus, Phereoeca uterella has been the subject of taxonomical confusion,[4][5] some of which is not yet fully resolved. The Sri Lankan case-bearing moth described as Tinea pachyspila and subsequently transferred to genus Phereoeca may either be considered to be this species,[3] or to instead be Phereoeca allutella.[6] Similarly, the Ugandan case-bearing moth originally described as Tinea barysticta may either be considered Phereoeca uterella[7][5] or a valid species (as Phereoeca barysticta).[8]

Description

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Larval case of Phereoeca uterella

The adult female has a wingspan of up to 13 mm. The forewings are gray with distinct dark spots and the plain hindwings are fringed with long gray hairs. The male is smaller (wingspan up to 9 mm) and more slender with less distinct markings. The reduced mouthparts suggest this species does not feed as an adult. The female lays up to 200 tiny pale blue eggs in sheltered places.

The larva constructs a protective case from silk and camouflages it with other materials such as soil, sand and insect droppings. When the larva is fully grown, this case is up to 14 mm long (twice the length of the animal) and is noticeably thickened in the middle so that it rather resembles a pumpkin seed. This shape allows the animal to turn around inside the case (the case has openings at both ends, both used by the head of the animal). Pupation occurs within the case.

The main food source for this species appears to be silk, especially spider webs, but also silk produced by other arthropods including discarded cases from the same species. Larvae also feed on dander and fallen human hair. Wool (but not cotton) is also a favoured food and the species can be a household pest.

Notes

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  1. ^ the term "bagworm" more properly refers to moths of family Psychidae, of which this species is not part[1]
  2. ^ a name also used to refer to the closely related Phereoeca allutella[2]

References

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  1. ^ a b c Villanueva-Jiménez, Juan A.; Fasulo, Thomas R. "household casebearer - Phereoeca uterella Walsingham". Featured Creatures. University of Florida Institute of Food and Agricultural Sciences. Retrieved 18 January 2024.
  2. ^ Scholtz, Clarke; Scholtz, Jenny; Klerk, Hennie de (10 March 2020). Pollinators, Predators & Parasites. Penguin Random House South Africa. ISBN 978-1-77584-632-1. Retrieved 18 January 2024.
  3. ^ a b Heppner, J. B. (1 September 2003). "Notes on the Plaster Bagworm, Phereoeca uterella, in Florida (Lepidoptera: Tineidae)". Holarctic Lepidoptera: 31–32. ISSN 1070-4140. Retrieved 18 January 2024.
  4. ^ a b c d Cock, Matthew J.W. (2021). "New records of butterflies and moths (Lepidoptera) from Tobago, W.I." Living World, Journal of the Trinidad and Tobago Field Naturalists' Club. Retrieved 18 January 2024.
  5. ^ a b Robinson, G. S.; Nielsen, E. S. (1 January 1993). Tineid Genera of Australia (Lepidoptera). Csiro Publishing. Chapter Five: Australian Tineid Genera: 17. Phereoeca. ISBN 978-0-643-10580-5. Retrieved 18 January 2024.
  6. ^ De Prins, Jurate; De Prins, Willy. "Phereoeca pachyspila (sensu Meyrick, 1911)". AfroMoths, online database of Afrotropical moth species (Lepidoptera). Retrieved 18 January 2024.
  7. ^ "300141.00 – 0390 Phereoeca uterella (Walsingham, 1897) - Household Casebearer". North American Moth Photographers Group. Mississippi Entomological Museum at Mississippi State University. Retrieved 18 January 2024.
  8. ^ De Prins, Jurate; De Prins, Willy. "Phereoeca barysticta (Meyrick, 1927)". AfroMoths, online database of Afrotropical moth species (Lepidoptera). Retrieved 18 January 2024.
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