If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email firstname.lastname@example.org
Spinactaletes is a genus of obligatory marine littoral springtails characterized by marked sexual dimorphism. males of most Spinactaletes species have spur- like sclerotized structures on the metathoracic legs, and many modified setae on the antennae that form the basis
for almost all species level diagnostic characters. females of most species have been impossible to identify when collected in isolation. The current distribution of the genus is restricted to the antilles, Venezuela, and the pacific coast of mexico. however, this distribution is undoubtedly
an artifact of collection effort. in this contribution, we report Spinactaletes for the first time from central america (costa rica) and draw attention to the utility of the chaetotaxy of the internal metatibiotarsal face in the identification of females. we collected costa rican Spinactaletes
at three localities on the caribbean coast and at one locality on the pacific coast. The material from the caribbean coast includes new species, Spinactaletes campylorachis sp. nov. and Spinactaletes deltalus sp. nov., herein described. from the pacific coast, we collected two
females and a juvenile showing unique metatibiotarsal chaetotaxy, but formal description of the species is deferred until their males are found. phylogenetic analysis of actaletidae species, using morphological data, supports the basal position of actaletes neptuni giard, 1889 and Spinactaletes
nemyops (soto-adames, 1987), but it cannot resolve relationships among species of Spinactaletes with metatibiotarsal spur. we suggest that molecular data will be needed to provide the phylogenetic backbone required to study character evolution and biogeography in this group.
The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.