Bombyx huttoni

Last updated

Bombyx huttoni
Bombyx huttoni.jpg
The cabinet of oriental entomology (Pl. 12) (5974846748) Fig 4.jpg
Illustration accompanying Westwood's description
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Bombycidae
Genus: Bombyx
Species:
B. huttoni
Binomial name
Bombyx huttoni
Westwood, 1847 [1] [2]
Synonyms
  • Theophila huttoni(Westwood, 1847) [3] [4]
  • Bombyx bengalensisMoore, 1862
  • Bombyx sherwilliHutton, 1865

Bombyx huttoni, or the chocolate-tipped silk moth, is a moth belonging to the silk moth family, Bombycidae. [5] It is closely related to the domestic silk moth ( Bombyx mori ).

Contents

It was described by John O. Westwood in 1847. [1] Westwood named the species after a Captain Thomas Hutton, FRGS of Mussoorie who forwarded the specimen to him. [6] The type specimen was collected by Hutton in Simla in 1837 but illness of the collector and the advent of the First Anglo-Afghan War delayed its dispatch to Europe till 1842. [6] Bombyx huttoni is one of the moths of the superfamily Bombycoidea which have had their complete mitochondrial genome reconstructed from whole-genome Illumina sequencing data. [7]

Description

The wings of the adult moth B. huttoni have concave margins. The wingspan is 40 millimetres (1.6 in) in males and 50 millimetres (2.0 in) in females. The forewings are grey-brown with a dark brown line across the forewing; the innermost lines near the base of the wing are double curves. The tip of the firewing has a dark chocolate-coloured patch. The hindwing is darker. Its inner margin is chequered brown and white with a broad grey border along the outer margin. [8]

Range

It is found in Pakistan, India, Vietnam, Nepal, Bhutan and Taiwan. [7] [9]

It ranges in India from the Northwest Himalayas to Sikkim, Assam and Arunachal Pradesh. [8]

Natural history

Caterpillar of B. huttoni Bombyx huttoni cat.jpg
Caterpillar of B. huttoni

The food plant of the wild silk moth B. huttoni is recorded by Hutton as the wild indigenous mulberry tree of the Northwest Himalayas, possibly Morus indica. The moth is bivoltine, with one brood in the spring and the other in the autumn. The eggs are laid in the previous season on bark, either of the trunk, or the underside of the branches, where they are sheltered from rain, snow and dust, and also from predators. They hatch just after the time the mulberry tree comes into leaf in the spring, typically in March. The eggs are similar to those of Bombyx mori but a pale-straw yellow in colour. [6] The caterpillar has black, brown and yellow streaks on its body. The first three segments are enlarged and it has paired-spines at the rear. [8]

Hutton describes the caterpillar in detail as follows: [6]

When the caterpillar is newly hatched its appearance, as seen under a good lens, is as follows :- Head and pro-legs shining jet black; body dark brown, approaching to black; the first segment whitish-ash, the fourth pale rufous, as are the anal feet; tubercles disposed in longitudinal rows, giving forth short tufts of hair; a small anal tubercle on the penultimate segment: thus far there is scarcely a difference between it and the young Chinese worm. Length fully 1/8th of an inch: strong and robust, as compared with the best domestic stock. In the course of a, day or two, the four anterior segments become greatly swollen and of a faint livid cream colour, the dorsal portion being mottled or dotted with deep brown; the orange or rufous colour of the fourth segment somewhat deeper.
About the fourth day the four anterior segments become swollen up very remarkably into a globular form, the dark spots being apparently beneath the skin ; the rest of the body dark brown, with here and there a tinge of dull yellowish. On the fifth day they prepared to moult. After the first moult, the second and third segments form a globular ball, apparently out of all proportion to the rest of the body ; the general ground colour becomes creamy-white, with the fourth segment yellow, the second and third being dotted above with dull leaden-grey; the remainder closely marbled over, or variegated without any definite arrangement, with black, grey, orange, ash and yellow blending like tortoise-shell; the fleshy tubercles or spines short, conical and brown; skin smooth. In the subsequent stages the general appearance remains the same, except that the spines are long and taper to a point, being fleshy at the base, but becoming somewhat horny towards the summits; all bend backwards in a curve except the central one on the penultimate segment, which lies down horizontally and points forward.

The cocoon is whitish in colour and of a "soft loose consistence, not unlike the cocoons of some Bengal Bombyx silk worms, but is much less compact; it is formed between the leaves of the food plant". [10]

However, the caterpillars are so numerous as to denude the mulberry tree including the leaves in which cocoons have already been spun forcing the caterpillars to die of hunger or to descend the tree and spin their cocoons on nearby bushes and plants, during which they fall prey to birds. The mulberry tree sets forth shoots and leaves by end June and well in time for the autumnal brood. [6]

Hutton reports the silk of wild B. huttoni moths to be of the best quality but not commercially viable due to uncertainties of supply in the wild. Hutton attempted to farm the moths for silk but found it impractical due to the tendency of caterpillars to wander off trays while being raised and their resultant predation. The moth also did not cross-breed with related wild silk moth species in his experiments, forcing him to conclude his enterprise. [6]

Related Research Articles

<i>Bombyx mori</i> Moth mainly used in the production of silk

Bombyx mori, the domestic silk moth, is an insect from the moth family Bombycidae. It is the closest relative of Bombyx mandarina, the wild silk moth. The silkworm is the larva or caterpillar of a silk moth. It is an economically important insect, being a primary producer of silk. A silkworm's preferred food are white mulberry leaves, though they may eat other mulberry species and even the osage orange. Domestic silk moths are entirely dependent on humans for reproduction, as a result of millennia of selective breeding. Wild silk moths are not as commercially viable in the production of silk.

<i>Attacus atlas</i> Species of moth

Attacus atlas, the Atlas moth, is a large saturniid moth endemic to the forests of Asia. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.

<span class="mw-page-title-main">Yellow-tail</span> Species of moth

The yellow-tail, goldtail moth or swan moth is a moth of the family Erebidae. The species was first described by Johann Kaspar Füssli in 1775, and has commonly been placed within the related genus Euproctis. It is distributed throughout Europe to the Urals, then east across the Palearctic to Siberia and south to India and Sri Lanka.

Bombyx is the genus of true silk moths or mulberry silk moths of the family Bombycidae, also known as silkworms, which are the larvae or caterpillars of silk moths. The genus was erected as a subgenus by Carl Linnaeus in his 10th edition of Systema Naturae (1758).

<i>Dryocampa rubicunda</i> Species of moth

Dryocampa rubicunda, the rosy maple moth, is a small North American moth in the family Saturniidae, also known as the great silk moths. It was first described by Johan Christian Fabricius in 1793. The species is known for its wooly body and pink and yellow coloration, which varies from cream or white to bright pink or yellow. Males have bushier antennae than females, which allow them to sense female pheromones for mating.

<i>Actias selene</i> Species of moth

Actias selene, the Indian moon moth or Indian luna moth, is a species of saturniid moth from Asia. It was first described by Jacob Hübner in 1807. This species is popular among amateur entomologists and is often reared from eggs or cocoons that are available from commercial sources. They fly mainly at night.

<i>Orgyia antiqua</i> Species of moth

Orgyia antiqua, the rusty tussock moth or vapourer, is a moth in the family Erebidae.

<span class="mw-page-title-main">Saddleback caterpillar</span> Larva of an eastern North American moth

The saddleback caterpillar is the larva of a species of moth native to eastern North America. It is also found in Mexico. The species belongs to the family of slug caterpillars, Limacodidae.

<i>Ornithoptera priamus</i> Species of birdwing butterfly

Ornithoptera priamus, the common green birdwing, Cape York birdwing, Priam's birdwing, northern birdwing or New Guinea birdwing is a widespread species of birdwing butterfly found in the central and south Moluccas, New Guinea, Bismarck Archipelago, Solomon Islands, and north-east Australia.

<i>Bombyx mandarina</i> Species of moth

Bombyx mandarina, the wild silk moth, is an insect from the moth family Bombycidae. It is the closest relative of Bombyx mori, the domesticated silk moth. The silkworm is the larva or caterpillar of a silk moth. Unlike the domesticated relative which is unable to fly or indeed persist outside human care, the wild silk moth is a fairly ordinary lepidopteran. Its main difference from the domesticated taxon is the more slender body with well-developed wings in males, and the dull greyish-brown colour.

<i>Actias isis</i> Species of moth

Actias isis is a moth of the family Saturniidae first described by Léon Sonthonnax in 1899.

<span class="mw-page-title-main">Silk industry in China</span>

China is the world's largest and earliest silk producer. The vast majority of Chinese silk originates from the mulberry silkworms. During the larval stage of its life-cycle, the insects feed on the leaves of mulberry trees. Non-mulberry silkworms cocoon production in China primarily focuses on wild silk from the Chinese Tussah moth. This moth typically feeds on trees and its larvae spin coarser, flatter, yellower filament than the mulberry silk moths.

<i>Cydia nigricana</i> Pea moth

Cydia nigricana, the pea moth, is a moth of the family Tortricidae. It is found in Europe.

<span class="mw-page-title-main">Wild silk</span>

Wild silks have been known and used in many countries from early times, although the scale of production is far smaller than that from cultivated silkworms. Silk cocoons and nests often resemble paper or cloth, and their use has arisen independently in many societies.

<i>Cricula trifenestrata</i> Species of moth

Cricula trifenestrata, the cricula silkmoth, is a species of wild silk moth of the family Saturniidae. It is found from India to the Philippines, Sulawesi, Java, and Sri Lanka.

<i>Bombycomorpha bifascia</i> Species of moth found in southern Africa

Bombycomorpha bifascia, the pepper-tree caterpillar, is a moth of the family Lasiocampidae, which is native to southern Africa.

Gastridiota is a monotypic genus consisting solely of Gastridiota adoxima, a moth of the family Bombycidae. The genus was erected by Alfred Jefferis Turner in 1922 but the species had been described by him in 1902 as Andraca adoxima. It is found in the subtropical east of Australia, from the Bunya Mountains and Montville in southern Queensland to north-eastern New South Wales.

<i>Antheraea pernyi</i> Species of moth

Antheraea pernyi, the Chinese (oak) tussar moth, Chinese tasar moth or temperate tussar moth, is a large moth in the family Saturniidae. The species was first described by Félix Édouard Guérin-Méneville in 1855. Antheraea roylei is an extremely close relative, and the present species might actually have evolved from ancestral A. roylei by chromosome rearrangement.

<i>Troides amphrysus</i> Species of butterfly

Troides amphrysus, the Malay birdwing, is a birdwing butterfly in the genus Troides in the family Papilionidae.

<i>Antheraea paphia</i> Species of moth

Antheraea paphia, known as the South India small tussore, the tasar silkworm and vanya silkworm is a species of moth of the family Saturniidae found in India and Sri Lanka. The bulk of the literature on this species uses a junior synonym, Antheraea mylitta, rather than the correct name, A. paphia. It is one of a number of tasar silkworms, species that produce Tussar silk, a kind of wild silk that is made from the products of saturniid silkworms instead of the domesticated silkworm.

References

  1. 1 2 Westwood, J. O (1848). The Cabinet of Oriental Entomology. London: William Smith. p. 26; Pl. 12, Fig. 4.
  2. Beccaloni, G.; Scoble, M.; Kitching, I.; Simonsen, T.; Robinson, G.; Pitkin, B.; Hine, A.; Lyal, C., eds. (2003). "Bombyx huttoni". The Global Lepidoptera Names Index . Natural History Museum . Retrieved 1 May 2020.
  3. Wardle, Thomas (1881). Handbook of the collection illustrative of the wild silks of India, in the Indian section of the South Kensington Museum, with a catalogue of the collection and numerous illustrations. London: Eyre & Spottiswoode for H.M. Stationery Office. p. 4. doi:10.5962/bhl.title.35685 . Retrieved 1 May 2020.
  4. Beccaloni, G.; Scoble, M.; Kitching, I.; Simonsen, T.; Robinson, G.; Pitkin, B.; Hine, A.; Lyal, C., eds. (2003). "Theophila". The Global Lepidoptera Names Index . Natural History Museum . Retrieved 1 May 2020.
  5. Bombyx huttoni in "UniProt: a worldwide hub of protein knowledge", Nucleic Acids Res. 47: D506–515 (2019) at [www.uniprot.org The UniProt Consortium]
  6. 1 2 3 4 5 6 Hutton, Thomas (1864). "On the Reversion and Restoration of the Silkworm (Part II.); with Distinctive Characters of Eighteen Species of Silk‐producing Bombycidæ". Transactions of the Royal Entomological Society of London. XIV (12): 295–331. doi:10.1111/j.1365-2311.1864.tb00108.x.
  7. 1 2 Peng, Xiao Yi; Zhou, Pei; Qiang, Yi; Qian, Zeng-Qiang (2016). "Characterization of the complete mitochondrial genome of Bombyx huttoni (Lepidoptera: Bombycidae)". Mitochondrial DNA Part A. Taylor & Francis Onlie. 27 (6): 4112–4113. doi:10.3109/19401736.2014.1003868. PMID   25629492. S2CID   3859475.
  8. 1 2 3 Shubhalaxmi, V. (2018). Birdwing Field Guide to Indian Moths. Mumbai: Birdwing Publishers. p. 41. ISBN   978-81-931736-0-2.
  9. Ratnasingham, Sujeevan; Hebert, Paul D. N. (2007). "TAXONOMY BROWSER: Bombyx huttoni". Barcode of Life Data System. 4. Retrieved 30 April 2020.
  10. Cotes, E.G. (1889). "The Wild Silk Insects Of India". Indian Museum Notes. Calcutta. II (2): 84–85. Retrieved 1 May 2020.