Antheraea

Hübner, 1819

tussar moths

Species Guides

2

Antheraea is a of giant silk moths in the Saturniidae, established by Jacob Hübner in 1819. in this genus are notable for producing wild silk of commercial importance, commonly known as "tussar silk" or "tussah silk." The genus includes species distributed across Asia, North America, and other regions, with several species cultivated for . Caterpillars of Antheraea species feed on diverse plants including oaks and other woody trees.

Antheraea polyphemus by (c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon. Used under a CC-BY license.Antheraea polyphemus by (c) David George, some rights reserved (CC BY), uploaded by David George. Used under a CC-BY license.Antheraea polyphemus by (c) Michelle W. （鍾偉瑋）, some rights reserved (CC BY), uploaded by Michelle W. （鍾偉瑋）. Used under a CC-BY license.

Pronunciation

How to pronounce Antheraea: /æn.ˈθɪə.ri.ə/

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Distribution

of Antheraea occur across Asia, North America, and Africa. Specific distribution varies by species: Antheraea polyphemus ranges from southern Canada through Mexico and most of the continental United States; Antheraea pernyi occurs in China; Antheraea paphia and Antheraea mylitta are found in India; Antheraea yamamai is native to Japan; Antheraea compta is to the Tibetan Sub-Himalayas.

Diet

Caterpillars of Antheraea are , feeding on leaves of various woody plants. Documented plants include oaks (Quercus species), including Quercus yunnanensis for Antheraea compta, as well as elm, walnut, hickory, maple, and other trees. Specific host associations vary by species and geographic region.

Host Associations

  • Quercus - larval plantMultiple oak including Quercus yunnanensis for A. compta; Valley oak for A. polyphemus
  • Carya - larval plantHickory documented for A. polyphemus
  • Juglans - larval plantWalnut documented for A. polyphemus
  • Ulmus - larval plantElm documented for A. polyphemus
  • Acer - larval plantMaple documented for A. polyphemus

Life Cycle

Antheraea undergo complete with four developmental stages: , larva (caterpillar), pupa (within cocoon), and . Larvae typically pass through multiple instars (five to six instars documented in several species). Caterpillars spin cocoons of leaves and silk for . In Antheraea polyphemus, the entire cycle from egg to adult has been observed to complete in less than two months under favorable conditions. Voltinism varies by species and ecorace, with some and others multivoltine.

Behavior

Antheraea are and attracted to light sources. Caterpillars of Antheraea polyphemus exhibit defensive including rearing the body in a 'sphinx' pose when threatened, and producing clicking sounds with the that may precede defensive regurgitation of distasteful fluids. Defensive behaviors have also been documented in other including Antheraea compta.

Ecological Role

As larvae, Antheraea function as herbivores consuming leaves of woody plants. As , they may contribute to pollination though this role is not well documented. The silk cocoons provide material for nest construction by other animals. Larvae serve as prey for various including birds, , and other insects.

Human Relevance

Antheraea are economically significant for wild silk production. Tussah silk (from Antheraea pernyi, A. paphia, and related species) is harvested from cocoons and woven into textiles. Antheraea mylitta, the tropical tasar , is commercially cultivated in India with multiple ecoraces maintained for . The has been subject to hybridization experiments for silk improvement, including artificial hybrids such as Antheraea × proylei. Antheraea polyphemus is frequently used in educational settings and public outreach due to its large size and striking appearance.

Similar Taxa

  • SamiaAlso in Saturniidae and produces wild silk (eri silk), but belongs to different (Saturniinae: Attacini vs. Saturniini for Antheraea) and has different geographic distribution and plant associations
  • BombyxProduces commercial silk (mulberry silk) but belongs to , not Saturniidae; domesticated with different and silk characteristics
  • HyalophoraNorth American giant silk in Saturniidae with similar size and appearance to Antheraea polyphemus, but distinguished by different wing patterns and eyespot arrangements

More Details

Sericulture and Silk Types

Tussah silk produced by Antheraea differs from mulberry silk (Bombyx mori) in being wild-harvested rather than domestically reared, resulting in coarser, more textured fiber. The silk is termed 'wild silk' or 'raw silk' and has been produced for at least 5,000 years. Multiple Antheraea species contribute to global tussah silk production including A. pernyi (Chinese oak silkmoth), A. paphia (India), A. mylitta (tropical tasar), and A. yamamai (Japanese oak silkmoth).

Conservation Status of Ecoraces

Antheraea mylitta exists as 44 distinct ecoraces across India, with significant variation in phenotypic traits including , voltinism, cocoon weight, and silk ratio. Some ecoraces such as the Andhra local ecorace are threatened with extinction due to weaknesses in , hatching, and low yield, prompting conservation efforts and genetic studies to preserve valuable genes for hybridization programs.

Hybridization

Artificial hybrids have been created between Antheraea , including Antheraea × proylei (A. pernyi male × A. roylei female) and experimental crosses involving A. polyphemus with A. paphia and A. yamamai using transfer techniques developed in 1959-1960.

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