Diversity and distribution of Laurencia sensu stricto (Rhodomelaceae, Rhodophyta) from the Mexican Pacific, including L. mutueae sp. nov.

Abstract

SUMMARY The alpha diversity of Laurencia sensu stricto, as well as the majority of the other algal groups along the Mexican Pacific, was underestimated because very few studies had incorporated the use of molecular markers in taxonomic studies, which would allow a more realistic estimation of diversity, incluing new records and new species. The records of Laurencia s.s. for the Eastern Pacific (California, USA to Chile) currently represent 23% of its richness worldwide. In this work, we proposed an updated census of the currently recognized species of Laurencia s.s. for the Mexican Pacific. This checklist reported the occurrence of 22 species that represent 16% of the 137 species worldly recorded. We further included taxonomic remarks, type localities, and a detailed distribution for each species. In addition, we proposed a new species for this region, Laurencia mutueae sp. nov., based on morphological observation as well as phylogenetic analyses. The distribution in the Mexican Pacific revealed that the highest records of species were for the sub‐temperate region, while the localities along the Mexican tropical Pacific were poorly recorded. The scarcity of floristic affinities between the eastern and the western and central parts of the North Pacific Ocean was hypothesized to be a consequence of a strong isolation and hard barriers, such as the water masses between these regions.

Chondrophycus anabeliae and Laurencia digitata (Ceramiales, Rhodophyta) are recorded for the first time for Venezuela expanding their geographic distributions beyond the type localities

“…For molecular studies, DNA extraction followed manufacturer´s instructions of the DNeasy Plant Mini Kit (Qiagen, Valencia, USA). PCR protocols for both markers followed Cassano et al (2019), using for rbcL the following pairs of primers: FrbcLstart-R492, F492-R1150 and F993-RrbcS (Freshwater & Rueness 1994), and for COI-5P the primer pair GAZF1-GAZR1 (Saunders 2005). For PCR amplification was used the PCR Master Mix (Promega, Madison, Wisconsin USA) in a final volume of 25 μl.…”

Patrones de distribución de la familia Solieriaceae (Gigartinales, Rhodophyta) en México

“…Este método ya ha sido utilizado y resultó ser eficaz para identificar patrones de distribución de otros grupos de macroalgas en México. Estos patrones se han podido relacionar con eventos evolutivos y ecológicos, han ayudado a proponer y priorizar áreas de conservación y a apoyar en la detección de problemáticas taxonómicas, principalmente en taxones ampliamente distribuidos (Hernández et al, 2017;Vilchis et al, 2018;Sentíes et al, 2019). Debido a que el análisis PAE no hace uso de las relaciones filogenéticas de los organismos, se ha propuesto una modificación conocida como Análisis Cladístico de Distribución y Endemismo (CADE, por sus siglas en inglés), que consiste en utilizar la distribución geográfica de taxones supraespecíficos con el objetivo de conseguir una mejor señal biogeográfica a partir de relaciones históricas entre áreas (Cracraft, 1991;Porzecanski y Cracraft, 2005).…”

Diversidade e filogenia do complexo Laurencia (Ceramiales, Rhodophyta) no Atlântico tropical e subtropical com ênfase na costa da Venezuela

“…Comparativamente com o rbcL, o COI-5P ainda é menos empregado para delimitação de espécies do complexo Laurencia (Kurihara et al 2010, Machín-Sánchez et al 2014, 2016, Collado-Vides et al 2018, Cassano et al 2019a, b, 2020, Sentíes et al 2019, Serio et al 2020, Hughey & Miller 2021, Popolizio et al 2022. O COI-5P é geralmente preferido para análises filogeográficas, enquanto o rbcL é preferido para inferir filogenia uma vez que é geralmente mais conservado (Draisma et al 2001).…”

“…A sua eficiência na identificação de espécies do complexo Laurencia já foi amplamente comprovada (Cassano 2009, Machín-Sánchez et al 2014, 2016, Collado-Vides et al 2018, Cassano et al 2019a, b, 2020, Sentíes et al 2019, Serio et al 2020, Hughey & Miller 2021.…”