Oncopeltus guttaloides

Slater, 1964

Oncopeltus guttaloides is a in the Lygaeidae, closely related to the well-studied (). The occurs in southern Central America, the Caribbean, and the southern United States. Its nymphs are gregarious and form large clusters on plants. Like other Oncopeltus species, it is associated with milkweed plants and exhibits aposematic coloration.

Oncopeltus guttaloides by (c) Francisco Farriols Sarabia, some rights reserved (CC BY), uploaded by Francisco Farriols Sarabia. Used under a CC-BY license.

Oncopeltus guttaloides adult by Francisco Farriols Sarabia. Used under a CC BY 4.0 license.

Oncopeltus guttaloides nymphs by Francisco Farriols Sarabia. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Oncopeltus guttaloides: /ˌɔŋkoʊˈpɛltəs ˌɡʌtəˈlɔɪdiːz/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Oncopeltus guttaloides can be distinguished from the similar by geographic range and subtle morphological differences described by Slater (1964). The exhibits the characteristic orange and black aposematic coloration common to milkweed-feeding Oncopeltus. Precise identification requires examination of genitalic structures and comparison with .

Images

Habitat

Associated with milkweed plants (Asclepias ), particularly in open, sunny environments where plants grow.

Distribution

Southern United States, Cuba, Guatemala, Honduras, Jamaica, Mexico, and Santo Domingo (Dominican Republic). Records span the Caribbean, Middle America, and southern North America.

Diet

Feeds on seeds of milkweed plants, using to penetrate seed pods and extract liquefied nutrients.

Host Associations

Asclepias - plantmilkweed seeds

Life Cycle

Nymphs are gregarious and occur in large clusters on plants. Development involves with , nymph, and stages. Multiple likely occur annually in warmer portions of the range.

Behavior

Nymphs exhibit gregarious , forming dense on plants. and nymphs cluster on developing seed .

Ecological Role

As a milkweed seed , reduces seed production of plants. Sequesters cardiac glycosides from milkweeds, contributing to Müllerian mimicry complexes with other aposematic milkweed .

Similar Taxa

Oncopeltus fasciatusNearly identical orange and black coloration and shared milkweed plants, but O. fasciatus has a more northerly distribution and undergoes well-documented . O. guttaloides occurs further south and its migratory has not been confirmed.
Lygaeus kalmiiAnother milkweed-feeding lygaeid with similar coloration, but smaller and with different pattern elements.

More Details

Taxonomic note

Described by Slater in 1964, this is part of a complex of Oncopeltus species specialized on milkweeds. Its is less studied than the model organism O. fasciatus.

Chemical ecology

Like other milkweed-feeding Oncopeltus, O. guttaloides likely sequesters cardiac glycosides from plants for defense against , though this has not been directly documented.