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A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

ABSTRACT: A new genus of minute stingless bees (Meliponini: Hypotrigonina) is described from Southeast Asia. Ebaiotrigona Engel & Nguyen, gen. nov., is based on the type species Lisotrigonacarpenteri Engel, recorded from Vietnam, Thailand, Laos, Cambodia, and southern China. The species was previously considered an enigmatic member of Lisotrigona Moure, but is removed to a new genus based on its unique male terminalia that differs considerably from that of Lisotrigona and instead shares resemblances with Austroplebeia Moure, and the presence of yellow maculation (also similar to that of Austroplebeia). It is possible that Ebaiotrigona is the extant sister group of Austroplebeia, but this requires confirmation by future phylogenetic analyses. Based on available biological observations, Ebaiotrigonacarpenteri could not be confirmed as lachryphagous as is well documented from the tear-drinking species of Lisotrigona and Pariotrigona Moure.

SUBMITTER: Engel MS

PROVIDER: S-EPMC8942966 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

Engel Michael S MS Nguyen Lien Thi Phuong LTP Tran Ngat Thi NT Truong Tuan Anh TA Motta Andrés F Herrera AFH

ZooKeys 20220316

A new genus of minute stingless bees (Meliponini: Hypotrigonina) is described from Southeast Asia. Ebaiotrigona Engel & Nguyen, gen. nov., is based on the type species Lisotrigonacarpenteri Engel, recorded from Vietnam, Thailand, Laos, Cambodia, and southern China. The species was previously considered an enigmatic member of Lisotrigona Moure, but is removed to a new genus based on its unique male terminalia that differs considerably from that of Lisotrigona an ...[more]

PMID: 35586599

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Project description:Eusocial insects offer a unique opportunity to analyze the evolution of body size differences between sexes in relation to social environment. The workers, being sterile females, are not subject to selection for reproductive function providing a natural control for parsing the effects of selection on reproductive function (i.e., sexual and fecundity selection) from other kinds of natural selection. Patterns of sexual size dimorphism (SSD) and testing of Rensch's rule controlling for phylogenetic effects were analyzed in the Meliponini or stingless bees. Theory predicts that queens may exhibit higher selection for fecundity in eusocial taxa, but contrary to this, we found mixed patterns of SSD in Meliponini. Non-Melipona species generally have a female-biased SSD, while all analyzed species of Melipona showed a male-biased SSD, indicating that the direction and magnitude of the selective pressures do not operate in the same way for all members of this taxon. The phylogenetic regressions revealed that the rate of divergence has not differed between the two castes of females and the males, that is, stingless bees do not seem to follow Rensch's rule (a slope >1), adding this highly eusocial taxon to the various solitary insect taxa not conforming with it. Noteworthy, when Melipona was removed from the analysis, the phylogenetic regressions for the thorax width of males on queens had a slope significantly smaller than 1, suggesting that the evolutionary divergence has been larger in queens than males, and could be explained by stronger selection on female fecundity only in non-Melipona species. Our results in the stingless bees question the classical explanation of female-biased SSD via fecundity and provide a first evidence of a more complex determination of SSD in highly eusocial species. We suggest that in highly eusocial taxa, additional selection mechanisms, possibly related to individual and colonial interests, could influence the evolution of environmentally determined traits such as body size.

Dataset Information

A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

Publications

A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

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Dataset Information

A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

Publications

﻿A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

A new genus of minute stingless bees from Southeast Asia (Hymenoptera, Apidae).