7 December 2021 Larval Structures and Bionomics of Two Species of the Genus Intybia Pascoe (Coleoptera: Melyridae: Malachiinae)
Makoto Asano
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Malachiine beetles characteristically show “foetometamorphosis” during their life cycles, in which the first larval instar is inactive and nonfeeding. However, its adaptive significance has yet to be elucidated. The adaptive significance of hypermetamorphosis, another type of holometamorphosis characterized by a dramatic change of larval morphology from triungulin to eruciform larval stages, has been suggested to include protection, combat, host finding, foraging, and food acquisition. Given these observations from hypermetamorphosis, it is possible that foetometamorphosis is also related to the life cycle, foraging requirements, and larval structure of malachiine beetles; however, biological data on this matter is lacking. In this paper, the mature larval structures, bionomics and life cycles of Intybia pelegrini pelegrini (Pic, 1910) and Intybia takaraensis (Nakane, 1955) are presented for the first time. Based on observations, the unusual larval developmental pattern for both species is discussed.

Makoto Asano "Larval Structures and Bionomics of Two Species of the Genus Intybia Pascoe (Coleoptera: Melyridae: Malachiinae)," The Coleopterists Bulletin 75(3), 617-628, (7 December 2021). https://doi.org/10.1649/0010-065X-75.3.617
Received: 20 October 2020; Accepted: 26 May 2021; Published: 7 December 2021
developmental period
habitat preference
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