Noctuidae

The Noctuidae, commonly known as owlet moths, cutworms or armyworms, are the most controversial family in the superfamily Noctuoidea because many of the clades are constantly changing, along with the other families of the Noctuoidea.[1][2][3] It was considered the largest family in Lepidoptera for a long time, but after regrouping Lymantriinae, Catocalinae and Calpinae within the family Erebidae, the latter holds this title now.[4] Currently, Noctuidae is the second largest family in Noctuoidea, with about 1,089 genera and 11,772 species.[5] However, this classification is still contingent, as more changes continue to appear between Noctuidae and Erebidae.

Owlet moths
Amphipoea oculea
Panthea coenobita
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Superfamily: Noctuoidea
Family: Noctuidae
Latreille, 1809
Type species
Noctua pronuba
Subfamilies
Diversity
About 11,772 species

Description
Noctuidae wings venation

Adult: Most noctuid adults have drab wings, but some subfamilies such as Acronictinae and Agaristinae are very colorful, especially those from tropical regions (e.g. Baorisa hieroglyphica). They are characterized by a structure in the metathorax called the nodular sclerite or epaulette, which separates the tympanum and the conjunctiva in the tympanal organ. It functions to keep parasites (Acari) out of the tympanal cavity. Another characteristic in this group is trifine hindwing venation, by reduction or absence of the second medial vein (M2).[6]

Larva: Commonly green or brown; however, some species present bright colors, such as the camphorweed cucullia moth (Cucullia alfarata). Most are pudgy and smooth with rounded short heads and few setae, but there are some exceptions in some subfamilies (e.g. Acronictinae and Pantheinae).[7]

Pupa: The pupae most often range from shiny brown to dark brown. When they newly pupate they are bright brownish orange, but after a few days start to get darker.

Eggs: Vary in colors, but all have a spherical shape.

Etymology

The word Noctuidae is derived from the name of the type genus Noctua, which is the Latin name for the little owl, and the patronymic suffix -idae used typically to form taxonomic family names in animals.[8]

The common name "owlet" originally means a small or young owl. The names "armyworms" and "cutworms" are based on the behavior of the larvae of this group, which can occur in destructive swarms and cut the stems of plants.[9]

Ecology

Distribution and diversity
Setaceous Hebrew character

This family is cosmopolitan and can be found worldwide except in the Antarctic region. However, some species such as the setaceous Hebrew character (Xestia c-nigrum) can be found in the Arctic Circle, specifically in the Yukon territory of western Canada, with an elevation 1,702 m above sea level, where the temperature fluctuates between 23/-25 °C (73/-13 °F).[10] Many species of dart moths have been recorded in elevations as high as 4,000 m above sea level (e.g. Xestia elisabetha).[11] Among the places where the number of species has been counted are North America and northern Mexico, with about 2,522 species. 1,576 species are found in Europe, while the other species are distributed worldwide.[3][12][13][14][15]

Mutualism
A Lychnis moth caterpillar feeding on the seeds of red campion (Silene dioica).

Members of Noctuidae, like other butterflies and moths, perform an important role in plant pollination. However, some species have developed a stronger connection with their host plants. For example, the lychnis moth (Hadena bicruris) has a strange mutualistic relationship with pink plants or carnation plants (Caryophyllaceae), in that larvae feed on the plant while the adults pollinate the flowers.[16]

The eight-spotted forester moth (Alypia octomaculata) puddling on water from a leaf of firebush (Croton lucidus).

Food guilds

Herbivory: Caterpillars of most Noctuidae feed on plants; some feed on poisonous plants and are unaffected by their chemical defences; for example, the splendid brocade moth (Lacanobia splendens) feeds on cowbane (Cicuta virosa), a plant that is notoriously toxic to vertebrates.[17]

Predation and cannibalism: During the larval stage, some cutworms readily feed on other insects. One such species is the shivering pinion (Lithophane querquera), whose larvae commonly feed on other lepidopteran larvae.[18] Moreover, many noctuid larvae, such as those of the fall armyworm (Spodoptera frugiperda) and of genera such as Heliothis and Helicoverpa, aggressively eat their siblings and often other species of caterpillar.[19]

Nectarivory and puddling: Like many Lepidoptera, many species of adult Noctuidae visit flowers for their nectar. They also seek other liquid food resources such as plant juices, honeydew, dung, urea and mud, among others.[20]

As is common in members of the order Lepidoptera, courtship in many Noctuidae includes a set of movements in which the female evaluates the male's reproductive fitness.[20]

Most noctuid moths produce pheromones that attract the opposite gender. Female pheromones that attract males occur widely and have long been studied, but the study of male pheromones has further to go.[20][21][22]

Reproduction
Lesser yellow underwing

Noctuid moths commonly begin the reproductive season from spring to fall, and mostly are multivoltine, such as the eastern panthea moth (Panthea furcilla), which reproduces over the year.[23] Nevertheless, some species have just one brood of offspring (univoltine); among the best known is the lesser yellow underwing (Noctua comes).[23]

Defense
The Spanish moth feeding on Amaryllis sp.

This group has a wide range of both chemical and physical defenses. Among the chemical defenses three types stand out. First, the pyrrolizidine alkaloid sequestration usually present in Arctiinae is also found in a few species of noctuids, including the Spanish moth (Xanthopastis timais).[24] Another chemical defense is formic acid production, which was thought to be present only in Notodontidae, but later was found in caterpillars of Trachosea champa.[25] Finally, the last type of chemical defense is regurgitation of plant compounds, often used by many insects, but the cabbage palm caterpillar (Litoprosopus futilis) produces a toxin called toluquinone that deters predators.[26]

On the other hand, the main physical defense in caterpillars and adults alike is mimicry. Most owlet moths have drab colors with a variety of patterns suitable to camouflage their bodies.[23] The second physical defense consists in thousands of secondary setae that surround the body. The subfamilies that present this mechanism are Pantheinae and Acronictinae. The third is aposematism, represented by species of Cucullinae.[23] Finally, all adults have another mechanism for defense: a tympanal organ available to hear the echolocation spread out by bats, so the moths can avoid them.[27]

Human importance
The Old World bollworm caterpillar feeding on a strawberry.

Agriculture

Many species of owlet moths are considered an agricultural problem around the world. Their larvae are typically known as "cutworms" or "armyworms" due to enormous swarms that destroy crops, orchards and gardens every year. The Old World bollworm (Helicoverpa armigera) produces losses in agriculture every year that exceed US$2 billion.[28] Additionally, the variegated cutworm (Peridroma saucia) is described by many as one of the most damaging pests to vegetables.[29]

Systematics

Since molecular analysis began to play a larger role in systematics, the structure of many Lepidoptera groups has been changing and Noctuidae is not an exception. Most recent studies have shown that Noctuidae sensu stricto is a monophyletic group, mainly based on trifine venation. However, there are some clades within Noctuidae sensu lato that have to be studied. This taxonomic division represent the subfamilies, tribes and subtribes considered so far.[1][12]

  • Family Noctuidae Latreille, 1809
    • Subfamily Plusiinae Boisduval, [1828]
      • Tribe Abrostolini Eichlin & Cunningham, 1978
      • Tribe Argyrogrammatini Eichlin & Cunningham, 1978
      • Tribe Plusiini Boisduval, [1828]
        • Subtribe Autoplusiina Kitching, 1987
        • Subtribe Euchalciina Chou & Lu, 1979
        • Subtribe Plusiina Boisduval, [1828]
    • Subfamily Bagisarinae Crumb, 1956
      • Tribe Cydosiini Kitching & Rawlins, [1998]
    • Subfamily Eustrotiinae Grote, 1882
    • Subfamily Acontiinae Guenée, 1841
    • Subfamily Pantheinae Smith, 1898
    • Subfamily Dilobinae Aurivillius, 1889
    • Subfamily Balsinae Grote, 1896
    • Subfamily Acronictinae Heinemann, 1859
    • Subfamily Metoponiinae Herrich-Schäffer, [1851]
      Calophasia lunula, caterpillar
    • Subfamily Cuculliinae Herrich-Schäffer, [1850]
    • Subfamily Amphipyrinae Guenée, 1837
      • Tribe Amphipyrini Guenée, 1837
      • Tribe Psaphidini Grote, 1896
        • Subtribe Psaphidina Grote, 1896
        • Subtribe Feraliina Poole, 1995
        • Subtribe Nocloina Poole, 1995
        • Subtribe Triocnemidina Poole, 1995
      • Tribe Stiriini Grote, 1882
        • Subtribe Azeniina
        • Subtribe Stiriina Grote, 1882
        • Subtribe Grotellina Poole, 1995
        • Subtribe Annaphilina Mustelin, 2006
    • Subfamily Oncocnemidinae Forbes & Franclemont, 1954
    • Subfamily Agaristinae Herrich-Schäffer, [1858]
    • Subfamily Condicinae Poole, 1995
      • Tribe Condicini Poole, 1995
      • Tribe Leuconyctini Poole, 1995
    • Subfamily Heliothinae Boisduval, [1828]
    • Subfamily Eriopinae Herrich-Schäffer, [1851]
    • Subfamily Bryophilinae Guenée, 1852
    • Subfamily Noctuinae Latreille, 1809
      • Tribe Actinotiini Beck, 1996
      • Tribe Arzamini Grote, 1883
      • Tribe Dypterygiini Forbes, 1954
      • Tribe Glottulini Guenée, 1852
      • Tribe Leucaniini Guenée, 1837
      • Tribe Noctuini Latreille, 1809
        • Subtribe Agrotina Rambur, 1848
        • Subtribe Noctuina Latreille, 1809
      • Tribe Pseudeustrotiini Beck, 1996
      • Tribe Phosphilini Poole, 1995
      • Tribe Prodeniini Forbes, 1954
      • Tribe Phlogophorini Hampson, 1918
      • Tribe Tholerini Beck, 1996
    • Subfamily Hadeninae Guenée, 1837
      • Tribe Apameini Guenée, 1841
      • Tribe Caradrinini Boisduval, 1840
        • Subtribe Caradrinina Boisduval, 1840
        • Subtribe Athetiina Fibiger & Lafontaine, 2005
      • Tribe Elaphriini Beck, 1996
      • Tribe Eriopygini Fibiger & Lafontaine, 2005
      • Tribe Hadenini Guenée, 1837
      • Tribe Ipimorphini
      • Tribe Mythimnini
      • Tribe Orthosiini Guenée, 1837
      • Tribe Xylenini Guenée, 1837
        • Subtribe Xylenina Guenée, 1837
        • Subtribe Cosmiina Guenée, 1852
        • Subtribe Antitypina Forbes & Franclemont, 1954
        • Subtribe Ufeina Crumb, 1956
    • Subfamily Raphiinae Beck, 1996
    • Subfamily Eucocytiinae Hampson, 1918

Genera with intervening taxonomy not available include:

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References
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