Cryptic species in time and space: an assessment of cryptic diversity within eight nominal species of Hydrozoa (Cnidaria)

Miglietta, Maria Pia; Pruski, Sarah

doi:10.1098/rspb.2023.0851

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…In the southern Gulf, diverse studies have been conducted since the collection of the specimens of this work (2005) reporting different hydrozoan species in coastal ecosystems but not reporting to M. inkermanica (e.g., Cortés-Lacomba et al, 2013;Gutiérrez-Aguirre et al, 2015;Ahuatzin-Hernández et al, 2020;López-Torres et al, 2023). In the northern Gulf, fewer studies have been carried out in this field, focusing on phylogenetic aspects (e.g., Pruski and Miglietta, 2019;Miglietta and Pruski, 2023). The monitoring hydrozoan diversity in nearby areas to the ports where tankers transporting M. cf.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of the hydromedusa Moerisia cf. inkermanica (Hydrozoa, Moerisiidae) in the ballast water of oil tankers in the Gulf of Mexico

Ahuatzin-Hernández,

Ordóñez-López,

Herrera-Rodríguez

et al. 2024

J. Mar. Biol. Ass.

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The introduction of non-native species is a constant concern around the world since it represents one of the main threats to biodiversity, impacting negatively on native populations, some of them with commercial importance. Hence, monitoring these introductions is fundamental to the management and conservation of the biodiversity of a region. Herein, we report the presence of Moerisia cf. inkermanica in the ballast water of oil tankers loaded at the Cayo Arcas oil terminal. The taxonomy of Moerisia members is uncertain due to the lack of comprehensive morphological descriptions and the few molecular data available. So, we provide a detailed morphological comparison among its congeners. The taxonomic identity of the specimens was determined based on the length of the perradial lobes of the manubrium, the number of tentacles, and the features of their nematocyst rings. Some Moerisids are considered invasive in different localities of the world. However, this genus had not been reported in coastal ecosystems of the Gulf of Mexico over the years until now. Sampled tankers came from different ports of the region, mainly from the northern Gulf of Mexico. Therefore, we encourage systematic monitoring of these ecosystems to recognize the establishment of this species as invasive in the region, know its population dynamics over time, and evaluate the possible ecological impacts that could exert on native populations.

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Section: Discussionmentioning

confidence: 99%

Occurrence of the hydromedusa Moerisia cf. inkermanica (Hydrozoa, Moerisiidae) in the ballast water of oil tankers in the Gulf of Mexico

Ahuatzin-Hernández,

Ordóñez-López,

Herrera-Rodríguez

et al. 2024

J. Mar. Biol. Ass.

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Cryptic species in time and space: an assessment of cryptic diversity within eight nominal species of Hydrozoa (Cnidaria)

Miglietta

Pruski

2023

Proc. R. Soc. B.

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Sampling in multiple localities, coupled with molecular barcoding, has shown that nominal species with wide geographical distribution often harbour local cryptic species in allopatry. Cryptic species in sympatry, however, can be easily missed if they have different seasonality, because they can be identified only through long-term frequent sampling (i.e. sampling through time of the same species in the same location). This is especially true in planktonic invertebrates that exhibit strong seasonality. By integrating mitochondrial 16S sequences of eight species of Hydrozoa (Cnidaria) collected weekly for a year in one Gulf of Mexico region, with sequences gathered globally, we investigate the presence of cryptic species within a temporal gradient (regionally) and on a spatial (worldwide) scale. We find that eight species of Hydrozoa are composed of 28 cryptic species, with 16 of them appearing in sympatry but with non-overlapping seasonality. The high number of sympatric cryptic species could only be discovered through extensive and prolonged regional sampling efforts. The bi-dimensional cryptic diversity (in time and space) highlighted in this study is essential for understanding processes of evolution, biogeography dispersal in the sea, and for more realistic biodiversity assessments.

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Cryptic diversity patterns of subterranean estuaries

Calderón-Gutiérrez,

Labonté,

Gonzalez

et al. 2024

Proc. R. Soc. B.

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Subterranean estuaries are coastal ecosystems characterized by vertically stratified groundwater. The biota within these ecosystems is relatively understudied due to the inherent difficulty of accessing such extreme environments. The fauna inhabiting these ecosystems is considered vulnerable to extinction, and the presence of cryptic species has major implications for research and conservation efforts. Most species lack molecular data; however, the evaluation of genetic data for some taxa has revealed that undocumented species are common. This study employs molecular species delimitation methods and DNA barcoding through the analysis of publicly and newly generated sequences, including individuals from type localities and non-crustacean phyla; the latter are typically overlooked in biodiversity assessments of subterranean estuaries. We analysed 376 cytochrome c oxidase subunit I (COI) gene sequences and 154 16S rRNA gene sequences. The COI sequences represented 32% of previously described species and 50% of stygobiont species from the Yucatan Peninsula and Cozumel Island, while sequences of the 16S rRNA represented 14% of described species and 22% of stygobionts. Our results revealed cryptic genetic lineages and taxonomic misidentification of species. As several species from these ecosystems are recognized as endangered, the use of molecular approaches will improve biodiversity estimates and highlight overlooked cryptic lineages in need of evaluation of conservation status.

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Cryptic species in time and space: an assessment of cryptic diversity within eight nominal species of Hydrozoa (Cnidaria)

Cited by 3 publications

References 31 publications

Occurrence of the hydromedusa Moerisia cf. inkermanica (Hydrozoa, Moerisiidae) in the ballast water of oil tankers in the Gulf of Mexico

Occurrence of the hydromedusa Moerisia cf. inkermanica (Hydrozoa, Moerisiidae) in the ballast water of oil tankers in the Gulf of Mexico

Cryptic species in time and space: an assessment of cryptic diversity within eight nominal species of Hydrozoa (Cnidaria)

Cryptic diversity patterns of subterranean estuaries

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