Grapsoid and Gall Crabs (Crustacea: Brachyura: Grapsoidea and Cryptochiroidea) of Easter Island

Boyko, Christopher B.; Liguori, Alyssa

doi:10.2984/69.4.6

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Once in the laboratory, specimens were identified to the lowest taxonomic level using available literature for continental (Ampuero, Palma, Veliz, & Pardo, 2010;Fagetti & Campodonico, 1970, 1971González, Haye, Balanda, & Thiel, 2008;Retamal & Moyano, 2010;Rozbaczylo, 1980) and insular fauna (Boyko & Liguori, 2015;Coloma, Moyano, Ruiz, & Marchant, 2004;de los Ríos-Escalante & Ibáñez-Arancibia, 2016;Gonzalez-Gordillo, Tsuchida, & Schubart, 2000;Kensley, 2003;Osorio, 2018;Poupin, 2003;Raines, 2002Raines, , 2003Raines, , 2007Raines & Huber, 2012;Rehder, 1980;Retamal, 2004; F I G U R E 1 Schematic representation of sampling sites at Rapa Nui's coral reefs (Poike; above) and Robinson Crusoe's rocky reefs (Adriatico; below). Photo credits: S.A. Carrasco Yáñez et al, 2009).…”

Section: Pelagic Samplingmentioning

confidence: 99%

Exploring overlooked components of remote South‐east Pacific oceanic islands: Larval and macrobenthic assemblages in reef habitats with distinct underwater soundscapes

Carrasco

Bravo

Avilés

et al. 2020

Aquatic Conservation

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1. Identifying the diverse assemblage of species inhabiting rocky and coral reef habitats in isolated oceanic environments, and the important sound cues emitted from the reef, are crucial components to understand how species locate suitable habitats for the completion of their life-cycle and, thus, the functioning of these vulnerable ecosystems. 2. Recent field information suggests that the majority of reef biodiversity comprises small cryptic invertebrates; however, knowledge on these small components is extremely scarce. 3. The present study used light attraction methods to explore the diversity of larval, post-larval and macrobenthic cryptic fauna, and hydrophones to characterize the natural soundscape of rocky and coral reef habitats at the Robinson Crusoe island (Juan Fernandez Archipelago; 33 38 0 S, 78 50 0 W), and Rapa Nui (Easter Island; 27 7 0 S, 109 21 0 W), respectively. 4. Pelagic collections found important site-specific patterns and identified two main species assemblages: early-life stages (e.g. eggs, larval and juvenile stages of crustaceans, molluscs, and fishes) and emerging macrobenthos (e.g. demersal zooplankton such as peracarid crustaceans, ostracods, copepods, and polychaetes), with the latter contributing between 73 and 98% to the total catches. 5. The soundscape records showed marked differences among sites and seasons at Robinson Crusoe island, with variable differences found between day and night. However, at Rapa Nui, there were no differences between sites, but the ambient sound was higher at night possibly due to higher snapping shrimp activity. 6. This information highlights the importance of considering small-scale (site-to-site) patterns when evaluating overlooked components of diversity (i.e. biological or acoustic) in oceanic habitats, and provides the basis for understanding the importance of natural noise in the settlement of most reef-associated species, crucial features for the conservation of these remote and vulnerable ecosystems.

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Section: Pelagic Samplingmentioning

confidence: 99%

Exploring overlooked components of remote South‐east Pacific oceanic islands: Larval and macrobenthic assemblages in reef habitats with distinct underwater soundscapes

Carrasco

Bravo

Avilés

et al. 2020

Aquatic Conservation

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show abstract

“…Recently, papers on the diversity of the island's portunoids (Boyko and Liguori, 2014), grapsoids and cryptochiroids (Boyko and Liguori, 2015) were published based, in large part, on material collected by this expedition. In the present paper, a new species of majoid belonging to the genus Achaeus Leach, 1817, is described and dedicated it to the memory of the late Michael Türkay.…”

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A new species of Achaeus Leach, 1817 (Decapoda: Brachyura: Majoidea: Inachidae) from Easter Island

Boyko

2016

Nauplius

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In the present paper, a new species of Achaeus Leach, 1817, is described from Easter Island and dedicated to the memory of Michael Türkay. Th is record represents the fi rst inachid spider crab and the sixth endemic brachyuran to be described from the island. It can be diff erentiated from congeners by its relatively short carapace, with the postorbital region not elongated, the arrangement and number of tubercles on the dorsal carapace surface, prominent hepatic lobe, presence of a large anterodistal lobe on the ocular peduncle, as well as structures of the third maxilliped and ambulatory legs.key words

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Conspicuous genetic similarity within a widely distributed and newly described species of

2021

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Some brachyuran crab species of the Western Pacific appear to be widespread throughout the region and distributed across a large geographic area, without obvious phylogeographic structuring. In the present study, we describe a new species of Parasesarma that appears to be restricted to Western Pacific islands (so far Guam, Palau, Vanuatu, Fiji, Wallis and New Caledonia). Comparisons of partial sequences of the COX1 gene show that individuals of this species, though from relatively isolated and widely separated islands, are monophyletic and, surprisingly, genetically uniform. These results give credence to the hypothesis that these oceanic islands serve as ‘stepping stones’ for the current-mediated dispersal and genetic homogenisation of coastal–littoral marine species. Morphologically, the new species differs most significantly from similar congeners in the tuberculation pattern of the chelar dactyli, whereas genetically it is markedly divergent from other morphologically similar species of Parasesarma, with a minimum COX1 p-distance of 6.9%. With such evidence, the new species is here formally described as Parasesarma daviei sp. nov. It is the fifth species of Parasesarma reported from oceanic islands of the Western Pacific. Compared to other congeners, P. daviei sp. nov. shows a close relationship with a clade including P. calypso. Therefore, P. calypso (De Man, 1895), and three of its former subspecies or varieties were subjected to a closer examination and are here rediagnosed and illustrated. In consequence, we suggest full species status for P. kuekenthali (De Man, 1902), P. lanchesteri (Tweedie, 1936), and P. ellenae (Pretzmann, 1968).

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Grapsoid and Gall Crabs (Crustacea: Brachyura: Grapsoidea and Cryptochiroidea) of Easter Island

Cited by 4 publications

References 14 publications

Exploring overlooked components of remote South‐east Pacific oceanic islands: Larval and macrobenthic assemblages in reef habitats with distinct underwater soundscapes

Exploring overlooked components of remote South‐east Pacific oceanic islands: Larval and macrobenthic assemblages in reef habitats with distinct underwater soundscapes

A new species of Achaeus Leach, 1817 (Decapoda: Brachyura: Majoidea: Inachidae) from Easter Island

Conspicuous genetic similarity within a widely distributed and newly described species of

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