Upiga

Last updated

Senita moth
Upiga virescens1.jpg
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Family:
Genus:
Upiga

Capps, 1964 [1]
Species:
U. virescens
Binomial name
Upiga virescens
(Hulst, 1900)
Synonyms
  • Eromene virescensHulst, 1900

Upiga is a monotypic moth genus described by Hahn William Capps in 1964. [1] The genus is placed in the family Crambidae, but has also been placed in Pyralidae. It contains only one species, Upiga virescens, the senita moth, described by George Duryea Hulst in 1900 and found in the Sonoran Desert of North America. [2] [3]

Contents

The moth is best known for its obligate mutualism with Pachycereus schottii , the senita cactus. The senita moth is one of the few pollinators of the senita cactus, and the moth relies on the cactus as a host for reproduction. Larvae bore into flowers and consume the developing fruit and seeds inside. This obligate mutualism is similar to that of yuccas and yucca moths. [4]

Description

The senita moth is light brown with wide white stripes traversing the body from head to wing tip. It is relatively small, with forewings 7 to 10 mm in length. [5] The abdomen of the female is covered with scales, called the posterior brush, which are used to collect pollen from senita cactus flowers. [4]

Distribution

The senita moth is native to the Sonoran Desert in the US state of Arizona and the Mexican states of Sonora and Baja California. [4]

Life cycle

The life cycle of the senita moth is completely reliant on the moth's host plant, the senita cactus. [5] The senita cactus has an extended flowering season during which several moth generations are completed. [6]

Egg

Eggs are laid singly on open senita cactus flowers, either on the petals, anthers, or the corolla tube. [3]

Larva

Larvae can hatch within hours of egg laying, but may take up to three days. First-instar larvae bore into the flowers of the senita cactus towards the developing fruit. This occurs within five to six days, as the corolla becomes impenetrable after this point, blocking larvae access to the fruit. The second instar begins once larvae start eating the developing fruit. Larvae develop into the third instar after they reach eight days of age. They then bore an exit hole through the fruit and, at twelve to seventeen days of age, either pupate or enter diapause, a state of developmental dormancy, to overwinter in the stem of the senita and then emerge in a later flowering season. [5]

Unlike other lepidopterans, whose larvae undergo at least four instars, senita moth larvae have only three instars. This could be due to size limitations, where larvae that continue to grow past the third instar are too large to emerge from exit holes previously created by the larvae, the time constraint of larval growth needing to be completed before fruit matures completely, or possibly to keep the life cycle short so that multiple generations can be completed in a single flowering season. [5]

Pupa

Pupation takes place in the cactus stem and adults emerge from exit holes created during the previous larval stage. [5]

Adult

Adult females are the main visitors to flowers. They collect pollen using the posterior brush and actively deposit pollen on stigmas. Additionally, moths may enter the flower for nectar collection. [4] Adults rest on cactus spines during the day. [6] Adults mate on mature cactus spines.

Larval host plant

The senita moth is a host specific, obligate mutualist with the senita cactus, meaning both species rely on each other for survival. Females lay eggs on host plant flowers, and larvae feed off of the developing fruit inside. [4]

Oviposition

Oviposition takes place on senita cactus flowers, which open after sunset for six to twelve hours, from late March to September. [4] [7] Eggs are laid evenly among flowers, with only one egg laid per flower. Flowers are open for only one night each. Singular oviposition is thought to reduce competition for food resources among larvae as well as reduce the overall risk of larval death from fruit abortion by spreading eggs among several flowers. [3]

By number alone, females oviposit most frequently on petals. However, when accounting for variation in surface area, oviposition occurs more frequently on the anthers and corolla tube. These eggs have a 40% greater survival rate than eggs laid on petals, perhaps due to the shortened distance to the fruit from anthers and the corolla tube or due to the added difficulty of entering the fruit from sticky, wilting petals. [3]

Survivorship

Less than 20% of larvae survive to six days of age. Larval survivorship is reduced by a low egg hatching percentage, corolla-induced mortality, resource-limited fruit abortion, and wasp parasitism. Corolla-induced mortality occurs when larvae are unable to bore through corollas within six days of hatching, after which the corollas become hardened and impenetrable by larvae. [4]

This rate of survivorship is important in maintaining the moth's mutualist relationship with the senita cactus; since the larvae cause fruit abscission and seed destruction, low larval survivorship is necessary for the senita moth's presence to be beneficial to the cactus. Because of the relatively low larval survival rate and the great benefit of the senita moth to pollination and fruit set, the benefits to the senita cactus of interaction with the senita moth are three to four times the cost of seed destruction. [4]

Parasitism

A significant proportion, 12 to 17%, of moths that survive to pupation are killed by endoparasitic wasps. Endoparasitic wasps oviposit on the body of the host, the larvae killing the host upon hatching. [4]

Mutualism

Yucca moths, which exhibit obligate mutualism with the yucca plant similar to the mutualism of the senita moth and senita cactus Bogus Yucca Moths - Prodoxus species, Woodbridge, Virginia.jpg
Yucca moths, which exhibit obligate mutualism with the yucca plant similar to the mutualism of the senita moth and senita cactus

The senita moth is an obligate mutualist with the senita cactus. Pollination of the senita cactus is dependent on the senita moth, with 75 to 95% of cactus fruit set resulting from nocturnal pollination by the senita moth. The remaining fruit set is resultant from daytime pollination by co-pollinators. [4] The senita moth is, in turn, reliant on the senita cactus for oviposition and larval food sources. [6] [8]

This mutualistic relationship is present throughout the senita moth's range, which suggests there is strong selective pressure on traits that maintain mutualism. [9]

Coevolution

Several traits of the senita cactus allowed for the coevolution of mutualism with the senita moth. The first is nocturnal flower opening, which favors interactions with the cactus's only nocturnal pollinator, the senita moth. The second trait is self-incompatibility of the host plant, which leads to a reliance on pollinators for reproduction. The third trait is resource-limited fruit production with a reduction in nectar production. Reduced nectar production suggests a lessened need to attract pollinators, as would be the case in obligate mutualism where pollinators rely on the host plant for reproduction. [6]

Comparison to other obligate pollinators

The senita moth is the sixth known example of pollination with seed consumption, and the third known example of obligate pollination with seed consumption. [4] [8] Senita cactus and senita moth mutualism is similar to the mutualism seen with figs and fig wasps and yuccas and yucca moths. [4] The senita moth's mutualism is unique in that it is not the sole pollinator of its host plant; the senita cactus is pollinated by a few species of bees in addition to the senita moth. This is atypical of specialized, obligate mutualism, and could suggest that the senita cactus is in an evolutionary transition state from a general mutualism with co-pollinators to a complete reliance on the senita moth for pollination. [7]

Related Research Articles

Fig wasp Group of mostly pollinating insects whose larvae live in figs.

Fig wasps are wasps of the superfamily Chalcidoidea which spend their larval stage inside figs. Most are pollinators but others simply feed off the plant. The non-pollinators belong to several groups within the superfamily Chalcidoidea, while the pollinators are in the family Agaonidae. While pollinating fig wasps are gall-makers, the remaining types either make their own galls or usurp the galls of other fig wasps; reports of them being parasitoids are considered dubious.

<i>Yucca</i> Genus of flowering plants belonging to the agave and Joshua tree subfamily

Yucca is a genus of perennial shrubs and trees in the family Asparagaceae, subfamily Agavoideae. Its 40–50 species are notable for their rosettes of evergreen, tough, sword-shaped leaves and large terminal panicles of white or whitish flowers. They are native to the hot and dry (arid) parts of the Americas and the Caribbean.

<i>Pieris rapae</i> Species of butterfly

Pieris rapae is a small- to medium-sized butterfly species of the whites-and-yellows family Pieridae. It is known in Europe as the small white, in North America as the cabbage white or cabbage butterfly, on several continents as the small cabbage white, and in New Zealand as the white butterfly. The butterfly is recognizable by its white color with small black dots on its wings, and it can be distinguished from P. brassicae by the smaller size and lack of the black band at the tip of their forewings.

Common blue Species of butterfly

The common blue butterfly or European common blue is a butterfly in the family Lycaenidae and subfamily Polyommatinae. The butterfly is found throughout the Palearctic. Butterflies in the Polyommatinae are collectively called blues, from the coloring of the wings. Common blue males usually have wings that are blue above with a black-brown border and a white fringe. The females are usually brown above with a blue dusting and orange spots.

The Prodoxidae are a family of moths, generally small in size and nondescript in appearance. They include species of moderate pest status, such as the currant shoot borer, and others of considerable ecological and evolutionary interest, such as various species of "yucca moths".

<i>Junonia coenia</i> Species of insect (butterfly)

Junonia coenia, known as the common buckeye or buckeye, is a butterfly in the family Nymphalidae. It is found in the United States east of the Rocky Mountains and in Mexico. Its habitat is open areas with low vegetation and some bare ground. Its original ancestry has been traced to Africa, which then experiences divergence in Asia. The species Junonia grisea, the gray buckeye, is found west of the Rocky Mountains and was formerly a subspecies of Junonia coenia.

<i>Breynia</i> Genus of flowering plants

Breynia is a plant genus in the family Phyllanthaceae, first described in 1776. It is native to Southeast Asia, China, the Indian Subcontinent, Papuasia, Australia, and the island of Réunion.

<i>Glochidion</i> Genus of flowering plants

Glochidion is a genus of flowering plants, of the family Phyllanthaceae, known as cheese trees or buttonwood in Australia, and leafflower trees in the scientific literature. It comprises about 300 species, distributed from Madagascar to the Pacific Islands. Glochidion species are used as food plants by the larvae of some Lepidoptera species including Aenetus eximia and Endoclita damor. The Nicobarese people have attested to the medicinal properties found in G. calocarpum, saying that its bark and seed are most effective in curing abdominal disorders associated with amoebiasis.

<i>Ficus aurea</i> Species of strangler fig

Ficus aurea, commonly known as the Florida strangler fig, golden fig, or higuerón, is a tree in the family Moraceae that is native to the U.S. state of Florida, the northern and western Caribbean, southern Mexico and Central America south to Panama. The specific epithet aurea was applied by English botanist Thomas Nuttall who described the species in 1846.

<i>Helicoverpa punctigera</i> Species of moth

Helicoverpa punctigera, the native budworm, Australian bollworm or Chloridea marmada, is a species of moth in the family Noctuidae. This species is native to Australia. H. punctigera are capable of long distance migration from their inland Australian habitat towards coastal regions and are an occasional migrant to New Zealand.

<i>Chloridea virescens</i> Species of moth

Chloridea virescens, commonly known as the tobacco budworm, is a moth of the family Noctuidae found throughout the eastern and southwestern United States along with parts of Central America and South America.

<i>Epicephala</i> Genus of moths

Epicephala is a genus of moths in the family Gracillariidae.

Parategeticula pollenifera is a moth of the family Prodoxidae. It is found in pine-oak forests in south-western Arizona, south-western New Mexico and Veracruz.

Tegeticula intermedia is a moth of the family Prodoxidae. Along with other moth species, it is commonly known as a yucca moth. T. intermedia lives in North America, particularly the United States. The moth resides in the southwest, the Great Plains, the Southeast, and mid-Atlantic. It also has been found much farther north in regions of Canada like Ontario and Alberta. There are also notable populations present in New Mexico. Their habitats are diverse and vary in terms of climate, landscape, and other factors. The moth lives in sand dunes, forests, glades, grassland, desert, and forests from the East Coast to the Southwest. Yucca moths have developed a strong mutualism with the yucca plant, such that both depend on each other for survival. The yucca moths and yucca plants have coevolved over millions of years. However, Tegeticula intermedia differs from most yucca moths in that it exhibits cheating behavior by laying eggs without pollinating the yucca plant.

Tegeticula cassandra is a moth of the family Prodoxidae. It is found in the United States in north-central Florida and bordering areas of Georgia. The habitat consists of open pine and pine-oak forests and open grassy areas with oak scrub.

<i>Lophocereus schottii</i> Species of cactus

Lophocereus schottii, the senita cactus, is a species of cactus from southern Arizona and north-western Mexico, particularly Baja California and Sonora. Synonyms include Pilocereus schottii and Pachycereus schottii.

<i>Blastophaga psenes</i> Species of wasp

Blastophaga psenes is a wasp species in the genus Blastophaga. It pollinates the common fig Ficus carica and the closely related Ficus palmata. Without a colony or nest, these wasps breed in figs and live for only a few days or weeks. They locate the fig they wish to pollinate through olfactory senses.

Ceratosolen is an Old World wasp genus in the family Agaonidae. They are pollinators of the monoecious fig subsections Sycomorus and Sycocarpus, and the section Neomorphe, all belonging to the subgenus Sycomorus. The genus is native to the Palearctic, Afrotropical, Indomalayan and Australasian realms.

Eurybia elvina, commonly known as the blind eurybia, is a Neotropical metalmark butterfly. Like many other riodinids, the caterpillars are myrmecophilous and have tentacle nectary organs that exude a fluid similar to that produced by the host plant Calathea ovandensis. This mutualistic relationship allows ants to harvest the exudate, and in return provide protection in the form of soil shelters for larvae. The larvae communicate with the ants by vibrations produced by the movement of its head. The species was described and given its binomial name by the German lepidopterist Hans Stichel in 1910.

<i>Hemileuca lucina</i> Species of moth

Hemileuca lucina, the New England buck moth, is a species of moth in the family Saturniidae. This moth species is only found in the New England region of the United States. Larvae in early stages mainly feed on meadow-sweet whereas larvae in later stages show variation in food sources such as blackberry and black cherry leaves. Larvae have a black body with orange/black spines on their back that are used to deter predators. Pupation occurs during the summer and adult moths come out around September.

References

  1. 1 2 "GlobIZ search". Global Information System on Pyraloidea. Retrieved November 2, 2017.
  2. "801029 – 4851 – Upiga virescens – (Hulst, 1900)". Moth Photographers Group. Mississippi State University.
  3. 1 2 3 4 Holland, J.; Buchanan, A.; Loubeau, R. (2004). "Oviposition choice and larval survival of an obligately pollinating granivorous moth". Evolutionary Ecology Research. 6: 607–618. CiteSeerX   10.1.1.518.3095 .
  4. 1 2 3 4 5 6 7 8 9 10 11 12 Holland, J. Nathaniel; Fleming, Theodore H. (January 9, 1999). "Mutualistic Interactions Between Upiga virescens (Pyralidae), a Pollinating Seed-Consumer, and Lophocereus schottii (Cactaceae)". Ecology. 80 (6): 2074–2084. doi:10.1890/0012-9658(1999)080[2074:mibuvp]2.0.co;2. hdl: 1911/21700 . ISSN   1939-9170.[ permanent dead link ]
  5. 1 2 3 4 5 Holland, J. Nathaniel (July 1, 2003). "Life Cycle and Growth of Senita Moths (Lepidoptera: Pyralidae): A Lepidopteran with Less Than Four Instars?". Annals of the Entomological Society of America. 96 (4): 519–523. doi:10.1603/0013-8746(2003)096[0519:lcagos]2.0.co;2. ISSN   0013-8746.
  6. 1 2 3 4 Fleming, Theodore H.; Holland, J. Nathaniel (1998). "The Evolution of Obligate Pollination Mutualisms: Senita Cactus and Senita Moth". Oecologia. 114 (3): 368–375. Bibcode:1998Oecol.114..368F. doi:10.1007/s004420050459. hdl: 1911/21699 . JSTOR   4221942. PMID   28307780. S2CID   21809821.
  7. 1 2 Holland, Nathaniel J.; Fleming, Theodore H. (December 1, 2002). "Co-pollinators and specialization in the pollinating seed-consumer mutualism between senita cacti and senita moths". Oecologia. 133 (4): 534–540. Bibcode:2002Oecol.133..534H. doi:10.1007/s00442-002-1061-y. hdl: 1911/21704 . ISSN   0029-8549. PMID   28466169. S2CID   25033208.
  8. 1 2 Hartmann, Stefanie; Nason, John D.; Bhattacharya, Debashish (July 1, 2002). "Phylogenetic origins of Lophocereus (Cactaceae) and the senita cactus–senita moth pollination mutualism". American Journal of Botany. 89 (7): 1085–1092. doi:10.3732/ajb.89.7.1085. ISSN   0002-9122. PMID   21665708.
  9. Holland, J. Nathaniel; Fleming, Theodore H. (1999). "Geographic and Population Variation in Pollinating Seed-Consuming Interactions between Senita Cacti (Lophocereus schottii) and Senita Moths (Upiga virescens)". Oecologia. 121 (3): 405–410. Bibcode:1999Oecol.121..405H. doi:10.1007/s004420050945. hdl: 1911/21701 . JSTOR   4222483. PMID   28308330. S2CID   5628587.