Lacosoma arizonicum

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Lacosoma arizonicum
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Mimallonidae
Genus: Lacosoma
Species:
L. arizonicum
Binomial name
Lacosoma arizonicum
Dyar, 1898 [1]

Lacosoma arizonicum, the southwestern sack-bearer moth, [2] is a species of moth in the family Mimallonidae and one of four species of sack-bearers occurring north of Mexico. [3] Its type locality is the Chiricahua Mountains of Arizona. [1] The species was first described by Harrison Gray Dyar Jr. in 1898 [1] from a single male specimen [4] and has Hodges number 7660. [3] [2]

Contents

Behavior and appearance

Caterpillars

The larval hostplant are species of oak ( Quercus ), [3] [1] with four species of oak observed as host plants in the wild: Quercus arizonica , Quercus emoryi , Quercus gambelii and Quercus hypoleucoides . [5] In addition, captive larvae have also been successfully raised on Quercus virginiana . [5] As with other species of Mimallonidae, the larvae feed concealed. Young larvae feed under a layer of silk netting, mixed with frass, covering part of the leaf on which they're feeding. Later instars form a case by sticking multiple leaves together with silk, which eventually becomes a compact and rigid tube-shaped case with an opening on both sides. [5] Larvae overwinter within this case prior to pupation. [5]

Larvae have an enlarged head and a flattened, armored anal plate, both of which are characteristic for species of Mimallonidae. [5] Final instar larvae have a brown base color with yellow stripe markings, with some variation in exact shade and shape of the markings. They resemble those of Lacosoma chiridota , but with more pronounced markings due to a higher contrast between marking and base color. [5]

Adult

Wings are pale brown, shaded rosy pink on the basal half, and have an obscure dot on both wings as well as a thin, very slightly curved, brown line. [4] Wingspan is approximately 29 mm. [3] [4] Adults are most commonly on wing during June to August. [3]

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References

  1. 1 2 3 4 Savela, Markku. "Lacosoma". Lepidoptera and some other life forms. Retrieved 2 July 2018.
  2. 1 2 "Moth Photographers Group – Lacosoma arizonicum – 7660". Moth Photographers Group at the Mississippi Entomological Museum at the Mississippi State University. Retrieved 2 July 2018.
  3. 1 2 3 4 5 "Species Lacosoma arizonicum - Hodges#7660 - BugGuide.Net". bugguide.net. Retrieved 2 July 2018.
  4. 1 2 3 Dyar, Harrison G. (1898). "New American Moths and Synonymical Notes". Journal of the New York Entomological Society. 6 (1): 44. Retrieved 2 July 2018.
  5. 1 2 3 4 5 6 St. Laurent, Ryan A.; Wagner, David L.; Reeves, Lawrence E.; Kawahara, Akito Y. (September 2017). "Notes on the Larva and Natural History of Lacosoma arizonicum Dyar (Mimallonoidea, Mimallonidae) with New Host and Parasitoid Records". Journal of the Lepidopterists' Society. 71 (3): 177–181. doi:10.18473/lepi.71i3.a9 . Retrieved 8 September 2022.