Crypticerya

Cockerell, 1895

fluted scales, channeled mealybugs

Species Guides

2

Crypticerya is a of giant scale insects in the Monophlebidae, comprising 28 described as of 2024. All species are native to the Americas. The genus was established by Cockerell in 1895 as a subgenus of Icerya, elevated to genus rank in 1899, synonymized in 1926, and revived in 2008. Species in this genus are commonly known as "fluted " or "channeled " due to the longitudinal grooves or channels present on the ovisacs of species that produce them. Many species are significant agricultural and urban pests.

Crypticerya townsendi by (c) Luke Padon, some rights reserved (CC BY), uploaded by Luke Padon. Used under a CC-BY license.Crypticerya genistae 55249203 by Alison Northup. Used under a CC BY 4.0 license.Crypticerya genistae 55249218 by Alison Northup. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Crypticerya: //ˌkrɪptɪˈsɛriə//

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

Identification

Distinguished from related by ovisacs with longitudinal flutes or grooves in that produce them. As members of Monophlebidae, they are relatively large scale insects compared to other . Species-level identification requires examination of morphological characters; C. multicicatrices is notable for multiple cicatrices (scar-like structures), while C. genistae and C. brasiliensis differ in preferences and geographic distribution.

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Habitat

Diverse environments including urban green areas, agricultural , and native vegetation. show varying preferences: C. multicicatrices prefers trees, while C. genistae favors shrubs and herbaceous plants. Found on leaves (especially abaxial surfaces and ), branches, stems, and inflorescences of plants.

Distribution

New World distribution, with all occurring in the Americas. Documented from the United States (Florida), Mexico, Colombia, Ecuador, Peru, Brazil, Argentina, Guyana, Cuba, and other regions. Specific species have more restricted ranges: C. multicicatrices is native to continental Colombia; C. brasiliensis occurs in Brazil, Argentina, Colombia, and Guyana.

Diet

Phytophagous; phloem-feeding sap-suckers. Feed on plant sap from leaves, branches, stems, and inflorescences.

Host Associations

  • Fabaceae - preferred Both C. multicicatrices and C. genistae prefer in this
  • Caryocaraceae - First monophlebid record; C. brasiliensis on Caryocar brasiliense
  • Moraceae - C. brasiliensis on Morus nigra
  • Anacardiaceae - C. multicicatrices on Mangifera indica
  • Arecaceae - C. multicicatrices on palms

Life Cycle

Development includes first-, second-, third-, and fourth-instar nymph stages, with the corresponding to the fourth instar. Ovisac production occurs in adult females. Duration of developmental stages varies with environmental conditions; in C. multicicatrices, total was significantly longer in semifield conditions (max temp 31.5°C, max RH 78.9%) than in glass house conditions (max temp 37.1°C, max RH 67.0%), though adult duration and reproductive period remained stable across environments.

Behavior

Nymphs typically concentrate on leaf , especially on the abaxial (lower) leaf surface. occur primarily on branches and stems. cause yellowing and shriveling of leaves, drying of branches, and promote growth of fungi through honeydew production. Some show ecological flexibility, expanding ranges in new environments.

Ecological Role

Herbivorous pests of native and cultivated plants. Facilitate growth of fungi (e.g., Capnodium sp.) through honeydew . Some have become , causing in urban green areas and posing phytosanitary risks to agriculture. Serve as for including Brethesiella cf. abnormicornis (Hymenoptera: Encyrtidae).

Human Relevance

Numerous are significant pests in urban forestry and agriculture. C. multicicatrices and C. genistae are considered serious pests in urban green areas, associated with sooty molds, leaf yellowing, and tree dieback. C. genistae infests Cajanus cajan (pigeon pea), a crop of nutritional importance. Management strategies are required for control in affected regions.

Similar Taxa

  • IceryaCrypticerya was originally established as a subgenus of Icerya; distinguished by ovisac with longitudinal grooves
  • Monophlebidae (other genera)Crypticerya are distinguished by the fluted ovisac structure and specific associations

More Details

Taxonomic history

The has undergone significant taxonomic revision: established as subgenus of Icerya by Cockerell (1895), elevated to genus (1899), synonymized (1926), and revived with 22 in 2008. As of 2024, 28 species are described.

Invasive potential

C. multicicatrices and C. genistae have demonstrated capacity, establishing in new regions and expanding ranges. In Ecuador, 85 new host were recorded for C. multicicatrices and 11 for C. genistae.

Reproductive biology

In C. multicicatrices, net reproductive rate (Ro) and mean time (T) were significantly higher in semifield than glass house conditions, indicating environmental sensitivity in .

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Sources and further reading