A new putative species in the Ectatomma ruidum complex (Formicidae: Ectatomminae) produces a species-specific distress call

Peña-Carrillo, Kenzy I.; Lorenzi, María Cristina; Brault, Maxence; Devienne, Paul; Lachaud, Jean‐Paul; Pavan, Gianni; Poteaux, Chantal

doi:10.1080/09524622.2021.1938226

Cited by 6 publications

(5 citation statements)

References 47 publications

(11 reference statements)

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“…We generated CHC profiles of 24 workers from two localities in Mexico (Puerto Morelos, Quintana Roo, 5 nests; Cuatode, Municipality of Santa María Tonameca, Oaxaca, 6 nests) following the procedure described by Peña‐Carrillo, Lorenzi, et al (2021), and pooled this information with the data set obtained in the latter study. The complete data set comprised 132 workers and included two to five ants per colony.…”

Section: Methodsmentioning

confidence: 99%

“…The CHC profiles varied considerably among populations, supporting the existence of various evolutionary lineages within the complex. More recently, a study of the distress call for members of this complex found that a population in Huaxpaltepec, Oaxaca, Mexico, differs significantly in this trait from other examined populations, strongly suggesting that this population could represent a distinct, undescribed species (Peña‐Carrillo, Lorenzi, et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Genome and cuticular hydrocarbon‐based species delimitation shed light on potential drivers of speciation in a Neotropical ant species complex

Meza-Lázaro

Peña-Carrillo

Poteaux

et al. 2022

Ecology and Evolution

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Geographic separation that leads to the evolution of reproductive isolation between populations generally is considered the most common form of speciation. However, speciation may also occur in the absence of geographic barriers due to phenotypic and genotypic factors such as chemical cue divergence, mating signal divergence, and mitonuclear conflict. Here, we performed an integrative study based on two genome‐wide techniques (3RAD and ultraconserved elements) coupled with cuticular hydrocarbon (CHC) and mitochondrial (mt) DNA sequence data, to assess the species limits within the Ectatomma ruidum species complex, a widespread and conspicuous group of Neotropical ants for which heteroplasmy (i.e., presence of multiple mtDNA variants in an individual) has been recently discovered in some populations from southeast Mexico. Our analyses indicate the existence of at least five distinct species in this complex: two widely distributed across the Neotropics, and three that are restricted to southeast Mexico and that apparently have high levels of heteroplasmy. We found that species boundaries in the complex did not coincide with geographic barriers. We therefore consider possible roles of alternative drivers that may have promoted the observed patterns of speciation, including mitonuclear incompatibility, CHC differentiation, and colony structure. Our study highlights the importance of simultaneously assessing different sources of evidence to disentangle the species limits of taxa with complicated evolutionary histories.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genome and cuticular hydrocarbon‐based species delimitation shed light on potential drivers of speciation in a Neotropical ant species complex

Meza-Lázaro

Peña-Carrillo

Poteaux

et al. 2022

Ecology and Evolution

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show abstract

“…The CHC profiles varied considerably among populations, supporting the existence of various evolutionary lineages within the complex. More recently, an acoustic study of the distress call for members of this complex found that a population in Huaxpaltepec, Oaxaca, Mexico, differs significantly in this trait from other examined populations, strongly suggesting that this population could represent a distinct, undescribed species (Peña-Carrillo et al 2021b).…”

Section: Introductionmentioning

confidence: 98%

Genome-wide and cuticular hydrocarbon evidence shed light on potential drivers of speciation in a Neotropical ant species complex

Meza-Lázaro

Peña-Carrillo

Poteaux

et al. 2021

Preprint

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Reproductive isolation between geographically separated populations is generally considered the most common form of speciation. However, speciation may also occur in the absence of geographic barriers due phenotypic and genotypic factors such as chemical cue divergence, mating signal divergence and mitonuclear conflict. Here we performed an integrative study based on two genome-wide techniques, 3RAD and ultraconserved elements, coupled with cuticular hydrocarbon and mtDNA sequence data, to assess the species limits within the E. ruidum species-complex, a widespread and conspicuous group of Neotropical ants for which heteroplasmy has been recently discovered in some populations from southeast Mexico. Our analyses indicate the existence of at least five distinct species in this complex, two widely distributed along the Neotropics and three that are restricted to southeast Mexico and that apparently have high levels of heteroplasmy. We found that species boundaries in the complex did not coincide with geographic barriers. We therefore consider possible roles of alternative drivers that may have promoted the observed patterns of speciation, including mitonuclear incompatibility, cuticular hydrocarbon differentiation, and colony structure. Our study highlights the importance of simultaneously assessing different sources of evidence to disentangle the species limits of taxa with complicated evolutionary histories.

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“…These are Ectatomma ruidum sp. 1, 2, 3–4, 5 and a possible 2x3 hybrid [ 31 – 34 ]. In terms of habitat, this species complex is widely distributed, occupying agricultural systems, savannas, and forests from sea level to an altitude of 1500–1600 m [ 26 ] and up to 2200 m [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Nest architecture and colony composition in two populations of Ectatomma ruidum sp. 2 (E. ruidum species complex) in southwestern Colombia

2022

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Nest architecture plays a fundamental role in the adaptation of ants to their habitat, favoring the action of economically important species. Ectatomma ruidum sp. 2 (ruidum species complex) is a biological control agent in Neotropical agroecosystems, exhibiting high bioturbation impact due to high nest densities. The architecture and composition of 152 nests were studied in two Andean populations of southwestern Colombia, 24 of them being cast using the paraffin wax technique. Nest entrance was a single, circular, 4 mm hole at ground level, without any special external structure, connected to a single vertical tunnel communicating with successive half ellipsoidal chambers. Nests were extremely shallow (depth range: 28.7–35.4 cm), with an average of six chambers and an overall volume of 92.2 cm3 per nest. The deeper the chamber, the smaller its volume. Nest building was independent of plants or roots, and no surface or underground physical connections were found between neighboring nests. Few nests possessed a queen, and neither ergatoids nor microgynes were recorded. Despite significant interactions between localities and the number of both males and workers, queen presence had an overall highly positive effect on the number of workers and larvae and a negative one on the number of gynes. Overall, the studied Colombian populations of E. ruidum sp. 2 retained the simple nest structure described for other species of this species complex and for colonies of the same species from other geographical areas, though they constrasted in their extreme shallowness. Our data suggest that E. ruidum sp. 2, at the local level, does not follow the usual monodomic pattern of this species with facultative polygyny but, rather, has a polydomic pattern with monogyny, perhaps related to the extreme shallowness of the nests due to soil structure, which could significantly enhance the queen’s reproductive inhibition previously reported for this species.

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A new putative species in the Ectatomma ruidum complex (Formicidae: Ectatomminae) produces a species-specific distress call

Cited by 6 publications

References 47 publications

Genome and cuticular hydrocarbon‐based species delimitation shed light on potential drivers of speciation in a Neotropical ant species complex

Genome and cuticular hydrocarbon‐based species delimitation shed light on potential drivers of speciation in a Neotropical ant species complex

Genome-wide and cuticular hydrocarbon evidence shed light on potential drivers of speciation in a Neotropical ant species complex

Nest architecture and colony composition in two populations of Ectatomma ruidum sp. 2 (E. ruidum species complex) in southwestern Colombia

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