The intertidal genus Indopacifica (Acari, Oribatida, Selenoribatidae): new species, juvenile morphology and distribution

Abstract

Two new intertidal oribatid mite species from the Indo-pacific region are described. Indopacifica iohanna sp. n. was found on the coasts of the Philippines and can be distinguished from its congeners by the lack of a ventral tooth on the claws. The larva and nymphs of this species show the same type of plication and setation typical for juveniles of other selenoribatid mites. Indopacifica mauritiana sp. n. was discovered on the coast of Mauritius and can be separated from its congeners by possessing only vestigial lamellar setae. A morphometric comparison of these two species and Indopacifica pantai from Thailand and Malaysia showed a clear separation between the three species. The known distribution of the genus Indopacifica stretches now from Mauritius in the West to the Philippines in the East and further occurrences within this area should be expected.

Juvenile morphology of seven intertidal mite species (Acari, Oribatida, Ameronothroidea) from the East Asian region

“…Immature stages of I. iohanna, I. taiyo and I. tyida show conformity in all characters except for the legs. Indodpacifica iohanna juveniles can be distinguished by the lack of proximoventral teeth on the claws (Resch et al 2019 ), a character that is present in the juveniles of the two other species. Indopacifica taiyo and I. tyida show slight differences in the development of leg setation (details are outlined in the respective remarks section), which would allow distinction at least in the deutonymphal stage.…”

Geological and paleoclimatic events reflected in phylogeographic patterns of intertidal arthropods (Acari, Oribatida, Selenoribatidae) from southern Japanese islands

“…The analyses were run for 20e −6 , 15e −6 , and 10e −6 generations for the concatenated, COI and 18S dataset, respectively. To ensure parameter convergence and stationarity of chains, split deviation frequencies lower than 0.01 were assured and effective sample sizes (ESS) were investigated in Tracer 1.6 (Rambaut et al, 2014) (available at http://beast.bio.ed.ac.uk/Tracer). The first 25% of obtained trees of the MrBayes run were discarded and the rest summarized in terms of a 50% majority rule consensus tree.…”

<p class="Body"><strong>First record of intertidal oribatid mites (Acari, Oribatida) from the Canaries – a new species and its complete ontogeny</strong></p>

“…Thalassozetes tenuisetosus was recorded on the coast of India (Bayartogtokh & Chatterjee 2010) and although Talker et al (1981) reported the occurrence of an undetermined Thalassozetes species from the Philippines, these specimens were recently described as members of the selenoribatid genus Indopacifica (Resch et al 2019). Therefore T. tenuisetosus is the only representative of this genus known from the Indo-Pacific area.…”