Apatelodidae

Adults are distinguished from related Bombycoidea families by combinations of wing venation, genitalia structure, and molecular characters. From Bombycidae: generally smaller size, different forewing venation with reduced or absent areole, and male genitalia with distinct valvae structure. From Phiditiidae: different wing pattern elements and genitalia morphology. From Eupterotidae: more compact body and different wing shape. Species-level identification relies heavily on male genitalia dissection, particularly aedeagus shape, presence/absence of socii on uncus, sacculus structure, and vesica cornuti. Wing characters including number and position of hyaline spots, transverse line patterns, and abdominal scale patches provide supplementary diagnostic features. DNA barcoding (COI) increasingly used for species discrimination, particularly in cryptic species complexes.

Primarily tropical and subtropical forests, ranging from lowland rainforest to montane cloud forest. Species occur in semi-evergreen forests, gallery forests, and disturbed forest edges. Some species recorded from protected areas including national forests and conservation units. Elevation range varies by species, with Amazonian lowland species and Andean/montane representatives. Larval host plants include shrubs and trees in several families; at least one species (Zanola verago) documented feeding on Piper neesianum (Piperaceae) in semi-evergreen forest understory.

Exclusively New World. Core distribution in Neotropical realm, extending from southern Mexico through Central America and Caribbean to South America. Northernmost records from Mexico (Yucatan Peninsula, southern Mexico). Southernmost extent to southern Brazil. Highest species diversity in Amazon basin, with significant representation in Atlantic Forest, Cerrado, and Andean regions. Some genera with restricted distributions (e.g., several newly described 2024 genera from specific biogeographic regions). Disjunct populations and endemic species on Caribbean islands. Limited records from Nearctic region (e.g., Vermont, USA) represent northern range margin.

Adults: Not documented; presumed non-feeding or with reduced feeding based on family-level patterns in Bombycoidea, but no direct evidence available. Larvae: Herbivorous, feeding on leaves of woody plants. Documented host plants include Duranta erecta (Verbenaceae) and Piper neesianum (Piperaceae). Host range likely broader than currently recorded given limited natural history data.

• Piper neesianum - larval host plantDocumented for Zanola verago in Yucatan Peninsula, Mexico
• Duranta erecta - larval host plantUsed in laboratory rearing of Ephoria species
• Enicospilus carmenae - parasitoidKoinobiont larval endoparasitoid of Zanola verago

Holometabolous with complete metamorphosis. Egg stage: Oviposition on host plant foliage; eggs ovoid with species-specific chorion sculpturing. Larval stage: Five instars typical for family; first instar with distinct chaetotaxy, subsequent instars with developed verrucae and setae; some species with urticating setae from early instars. Pupal stage: Within silk cocoon, duration variable with environmental conditions. Adult emergence: Males and females with similar timing; no documented diapause, though seasonal patterns likely in seasonal habitats. Development time from egg to adult estimated 4-8 weeks under favorable conditions based on laboratory rearing of Ephoria species.

Adults nocturnal, attracted to light. Males detect female sex pheromones; Thelosia camina uses uncommon C18 conjugated dienes as pheromone components. Larvae solitary feeders on host plant foliage. Defensive behavior includes urtication via specialized setae in some species. Pupation in silk cocoon, typically attached to substrate or within leaf litter. No documented migratory behavior; populations likely sedentary with localized dispersal.

Primary consumers as larvae, converting plant biomass to animal tissue. Prey for parasitoid wasps (documented: Ichneumonidae). Contribution to nutrient cycling through herbivory and detritus from larval feeding. Pollination role unknown; adults likely incidental pollinators if they feed. Cocoon silk potentially used by other organisms. No documented ecosystem engineering effects.

Minor economic importance. Thelosia camina documented as pest of yerba mate (Ilex paraguariensis) cultivation, though damage extent not quantified. Urticating setae of larvae pose potential health hazard to field workers and researchers handling specimens. No silk production industry; cocoons not harvested. Subject of scientific research due to taxonomic complexity and phylogenetic significance within Bombycoidea. Some species photographed by naturalists and represented in biodiversity databases (iNaturalist: >23,000 observations).

• BombycidaeHistorically included Apatelodidae as subfamily Apatelodinae; distinguished by larger body size, presence of forewing areole, and different male genitalia structure
• PhiditiidaeAlso recently elevated from Bombycidae subfamily; distinguished by wing pattern elements, genitalia morphology, and molecular characters
• EupterotidaeOverlapping distribution and general appearance; distinguished by more elongate wings, different venation, and genitalia characters
• SaturniidaeSimilar size and appearance in some species; distinguished by reduced mouthparts, different wing venation with distinct eyespot patterns, and bipectinate antennae in both sexes

Previously treated as subfamily of Bombycidae rather than distinct family; this classification persisted until recent molecular phylogenetic studies. The genus Olceclostera was long considered to contain a single widespread species (O. bifenestrata) spanning Costa Rica to southern Brazil; molecular and morphological data revealed this as a species complex of at least five distinct species. Many species descriptions based solely on wing pattern without genitalia examination, leading to synonymies and misidentifications later corrected by dissection-based revisions.

• Bombycoidea
• Neotropical
• silkworm moths
• urticating setae
• taxonomic revision
• molecular systematics
• cryptic species
• herbivory
• parasitoid host

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Systematics of Apatelodidae Neumoegen & Dyar, 1894 (Lepidoptera: Bombycoidea) based on molecular and morphological data
• A new species of Drepatelodes (Lepidoptera: Bombycoidea: Apatelodidae) from Floresta Nacional do Tapajós, Pará, Brazil
• More than Olceclostera bifenestrata: New species and morphology of immature stages of Olceclostera Butler, 1879 (Lepidoptera: Bombycoidea, Apatelodidae)
• Immature stages of two Ephoria species (Lepidoptera: Bombycoidea: Apatelodidae): Comparative morphology, bionomics, and the first record of urticating setae in the family
• Revision of Zapatodes Orlandin, Piovesan & Carneiro, 2025 (Lepidoptera: Bombycoidea, Apatelodidae) with description of seven new species
• A New Species of Enicospilus Stephens, 1835 (Ichneumonidae, Ophioninae), from Southern Mexico, Parasitic on Zanola verago Cramer, 1777 (Lepidoptera, Apatelodidae), Feeding on Piper neesianum C. DC. (Piperaceae)
• Uncommon C18 Conjugated Dienes Define the Sex Pheromone System of Thelosia camina (Lepidoptera: Apatelodidae), a Pest of Yerba Mate.