Phylogenetic relationships among the freshwater genera of palaemonid shrimps (Crustacea: Decapoda) from Mexico: evidence of multiple invasions

Abstract

ABSTRACT. Palaemonid shrimps form a large and diversified group distributed primarily in marine waters. Within the family Palaemonidae the subfamily Palaemoninae is composed of 26 genera and more than 370 species inhabiting marine and fresh waters in epigean and hypogean habitats. One of the relevant questions that have emerged in relation to the subfamily is how the invasion to freshwater has occurred in Mexico, where six freshwater genera belonging to the Palaemoninae (Creaseria, Cryphiops, Macrobrachium, Palaemonetes, Neopalaemon and Troglomexicanus), are present. The purpose of this study was to explore the relationships among these freshwater lineages through a phylogenetic analysis based on partial sequences of the 16S mitochondrial gene to elucidate if these genera are closely related and derived from a common ancestor or if each lineage has invaded the freshwater habitat independently. The analysis included species representing monotypic and diversified genera, from epigean and hypogean habitats and with complete and abbreviated larval development. The results suggest that the invasion of freshwater occurred on four different occasions and that the different lineages originated before the invasions of freshwater occurred. Keywords: Palaemoninae, freshwater invasion, 16S mtDNA, phylogeny, Mexico.Relaciones filogenéticas entre los géneros de camarones palaemónidos de agua dulce (Crustacea: Decapoda) de México: ¿evidencia de invasiones múltiples?RESUMEN. Los camarones palaemónidos forman un grupo grande y diversificado distribuido principalmente en el ambiente marino. Dentro de la familia Palaemonidae la subfamilia Palaemoninae está formada por 26 géneros y más de 370 especies que habitan aguas marinas y dulces en hábitats epigeos e hipogeos. Una de las preguntas relevantes que ha emergido en relación a la subfamilia Palaemoninae es cómo ha ocurrido la invasión de especies en agua dulce, que en México, está representada por seis géneros dulceacuícolas (Creaseria, Cryphiops, Macrobrachium, Palaemonetes, Neopalaemon y Troglomexicanus). El propósito de este estudio es explorar las relaciones entre estos linajes dulceacuícolas mediante un análisis filogenético basado en secuencias parciales del gen 16S mitocondrial para determinar si estos géneros están cercanamente relacionados y derivan de un ancestro común o si cada linaje ha invadido el agua dulce independientemente. El análisis incluye especies que representan un género diversificado y monotípico, de hábitats epigeos e hipogeos, con desarrollo larval extendido y abreviado. Los resultados sugieren que la invasión del agua dulce ocurrió en por lo menos cuatro ocasiones diferentes y que los diferentes linajes se originaron antes de que la invasión del agua dulce ocurriera. Palabras clave: Palaemoninae, invasión del agua dulce, 16S mtADN, filogenia, México.

Do saline taxa evolve faster? Comparing relative rates of molecular evolution between freshwater and marine eukaryotes

“…; Hou et al. ; Graf ; Botello and Alverez ). Some groups of organisms, such as crustaceans, may be predisposed to more easily transitioning between aquatic habitat types, as supported by recent invasions of FW (Lee and Bell ).…”

An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)

“…This pattern would indicate vicariance to play a more defining role than dispersal in the evolution of the various Palaemon lineages. Botello & Álvarez () also did not recover the American species as a single clade, suggesting multiples lines of origin for American species, albeit based on a limited number of taxa. These non‐conclusive results reinforce the need for more comprehensive studies, preferably using multiple lines of evidence, in order to recover more reliable phylogenies, which allow us to better understand morphological and geographical evolutionary directions in this group of shrimps.…”

The Habitat Types of Freshwater Prawns (Palaemonidae: Macrobrachium) with Abbreviated Larval Development in Mesoamerica (Mexico, Guatemala and Belize)

“…The genus Macrobrachium has their origins estimated to have occurred in the Cretaceous [17] and just is when these mountain systems arose, with the volcanic belt serving as a geographical barrier for this group. The Macrobrachium species colonized these freshwater habitats together with Creaseria morleyi before the emergence of the Yucatan Peninsula [18]. Because the diversification among the freshwater prawns with abbreviated larval development occurred from an ancestor previously adapted [19] to the freshwater habitats, the isolation of suitable freshwater conditions (cooler temperatures, etc.)…”