The two species are reliably distinguishable only by the proportions of the merus and propodus of the third pereiopod.
Arthur Anker, Juan Felipe Lazarus 2015, 'Description of two new associated infaunal decapod crustaceans (Axianassidae and Alpheidae)from the tropical eastern Pacific', Papéis Avulsos de Zoologiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015000800115&lng=en&tlng=en. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The new species can easily be differentiated by the lateral expansion of the ischium of pereiopod 7 of the male.
Paula Beatriz Araujo, Maurício Pereira Almerão 2007, 'Nova espécie de Trichorhina (Isopoda, Oniscidea, Plathyarthridae) do Brasil A newspecies of Trichorhina (Isopoda, Oniscidea, Plathyarthridae) from Brazil', Iheringia: Série Zoologiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000200012. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)