Phylogenetic reconstruction of the genus Pseudaeginella (Amphipoda: Caprellidae), with the description of a new species from Brazil

The Unique Amphipoda and Tanaidacea (Crustacea: Peracarida) Associated With the Brown Algae Dictyota sp. From the Oceanic Trindade Island, Southwestern Atlantic, With Biogeographic and Phylogenetic Insights

“…Character polarization was conducted a posteriori according to Nixon and Carpenter (1993), and character optimization was made with Winclada (Nixon, 2002). For character discussion, the abbreviation used [SX(Y)] means the "state Y of character X" (Iwasa-Arai and Iwasa-Arai et al, 2019). Synapomorphic characters whose secondary homology (sensu De Pinna, 1991) was rejected are herein referred to as "homoplastic synapomorphy" synapomorphies (e.g., Wheeler et al, 1993;Gomes-da-Silva and Souza-Chies, 2017;Iwasa-Arai and Serejo, 2018).…”

First record of the genus Pseudaeginella Mayer, 1890 (Crustacea, Amphipoda, Caprellidae) with a new species from Korean waters

“…Among the genera, Pseudaeginella Mayer, 1890 is morphologically similar to Paradeutella Mayer, 1890 in having the following characteristics: (1) head with a dorsal projection; (2) mandibular palp triarticulate; (3) molar small or absent; (4) pereopods 3 and 4 uniarticulate ( Stebbing 1888 ). In their study, Iwasa-Arai et al (2019) proposed the phylogenetic analysis of Pseudaeginella and the two Paradeutella species [ P. multispinosa (Schellenberg, 1928), P. tanzaniensis (Guerra-García, 2001)] and mentioned that both genera are morphologically similar to each other. Therefore, both genera could be re-established or synonymized in the future ( Zeina and Guerra-García 2016 ).…”

“…To date, Pseudaeginella comprises 13 described species ( Horton et al 2023 ) and is distributed worldwide, but mainly in tropical and subtropical regions ( Iwasa-Arai et al 2019 ). Each species in the genus is recorded in the following areas: (1) Pacific Ocean: P. biscaynensis (McCain, 1968), P. campbellensis Guerra-García, 2003, P. polynesica (Müller, 1990), P. telukrimau Lim, Azman, Takeuchi & Othman, 2017; (2) Atlantic Ocean: P. arraialensis Ros, Lacerda & Guerra-García, 2017, P. biscaynensis , P. colombiensis Guerra-García, Krapp-Schickel & Müller, 2006, P. freirei Siqueira & Iwasa-Arai, 2019, P. montoucheti (Quitete, 1971), P. tristanensis (Stebbing, 1888); and (3) Indian Ocean: P. biscaynensis , P. hormozensis Momtazi & Sari, 2013, P. inae Krapp-Schickel & Guerra-García, 2005, P. polynesica , P. sanctipauli Laubitz, 1995, P. tristanensis , P. vaderi Guerra-García, 2004 ( Iwasa-Arai et al 2019 ).…”

A new species of Deutella (Amphipoda: Caprellidae) from the Gulf of Mexico

“…The Caprellidae (skeleton shrimps) belong to the Order Amphipoda, and include benthic marine organisms associated with a wide variety of substrates where they feed, reproduce and protect themselves against different predators (Iwasa-Arai et al, 2019). In coral reef ecosystems the caprellids have been documented on several substrates, such as algae, sponges, seagrasses, hydroids, bryozoans, soft bottoms, and coral rubble (Paz-Ríos et al, 2014;Winfield & Ortiz, 2013).…”