REDESCRIPTION OF SEIRA OCEANICA YOSII, 1960 (COLLEMBOLA: ENTOMOBRYIDAE)

REDESCRIPTION OF SEIRA OCEANICA YOSII, 1960 (COLLEMBOLA: ENTOMOBRYIDAE

COLLEMBOLA ASSOCIATED WITH GRASSES IN THE GROUNDS OF THE UNIVERSITY OF PUERTO RICO AT MAYAGÜEZ

COLLEMBOLA ASSOCIATED WITH GRASSES IN THE GROUNDS OF THE UNIVERSITY OF PUERTO RICO AT MAYAGÜE

NINE NEW RECORDS OF COLLEMBOLA (INSECTA) FROM PUERTO RICO AND THE FIRST RECORD OF THE ORDER FROM TORTOLA, BRITISH WEST INDIES

NINE NEW RECORDS OF COLLEMBOLA (INSECTA) FROM PUERTO RICO AND THE FIRST RECORD OF THE ORDER FROM TORTOLA, BRITISH WEST INDIE

FIRST TWO RECORDS OF PROTURA (INSECTA) FROM THE DOMINICAN REPUBLIC WITH SYNOPSES OF BOTH SPECIES

FIRST TWO RECORDS OF PROTURA (INSECTA) FROM THE DOMINICAN REPUBLIC WITH SYNOPSES OF BOTH SPECIE

Comparative analysis of the dorsal chaetotaxy of Troglopedetes, Trogolaphysa, and Campylothorax supports the synonymization of tribes paronellini and troglopedetini (Collembola: Paronellidae)

Genera in subfamily Paronellinae have been grouped into five tribes, in part based on chaetotaxy. Tribes Bromacanthini, Paronellini, and Troglopedetini are characterized by having rounded scales and reduced or no macrochaetae, and although Bromacanthini harbors two well-differentiated genera, the core genera in tribes Paronellini and Troglopedetini form a homogeneous group where even generic diagnoses were, until recently, unclear. The genera assigned to Troglopedetini (Troglopedetes Absolon, Trogolaphysa Mills, and Cyphoderopsis Carpenter) harbor many species with reduced eyes number, whereas the tribe Paronellini (genera Paronella Schött, Dicranocentruga Wray and Campylothorax Schött) includes species with 6-8 eyes. Recent analyses of the chaetotaxy of Trogolaphysa and Cyphoderopsis suggest that these genera represent specialized forms related to species in Paronellini. The taxonomy of Troglopedetes, the type genus of Troglopedetini, is based almost exclusively on claw and mucro shape and dorsal macrochaetae pattern, and few details of the complete dorsal chaetotaxy of the species are known. This contribution presents a comparative analysis of the complete dorsal chaetotaxy of two species of Troglopedetes from Spain (one new to science), two new species of Trogolaphysa from the Dominican Republic and Martinique, and Campylothorax sabanus with the purpose of identifying aspects of the chaetotaxy that could provide diagnostic characters for the separation of Trogolaphysa and Troglopedetes, and a new diagnosis for tribe Troglopedetini. The analysis shows that neither the number of chaetae nor its organization or pattern of macrochaeta provides diagnostic differences between Trogolaphysa and Troglopedetes. It is also concluded that the separation of Paronellini and Troglopedetini is not justified. Troglopedetini is here synonymized with Paronellini, and a new diagnosis of Paronellini is provided

Mating and aggregative behaviors among basal hexapods in the Early Cretaceous

Among the many challenges in paleobiology is the inference and reconstruction of behaviors that rarely, if ever, leave a physical trace on the environment that is suitable for fossilization. Of particular significance are those behaviors tied to mating and courtship, individual interactions critical for species integrity and continuance, as well as those for dispersal, permitting the taxon to expand its distribution as well as access new habitats in the face of local or long-term environmental change. In this context, two recently discovered fossils from the Early Cretaceous amber of Spain (ca. 105 mya) give a detailed view of otherwise fleeting ethologies in Collembola. These occurrences are phylogenetically spaced across the class, and from species representing the two major clades of springtailsÐSymphypleona and Entomobryomorpha. Specifically, we report unique evidence from a symphypleonan male (Pseudosminthurides stoechus SaÂnchez-GarcõÂa & Engel, 2016) with modified antennae that may have functioned as a clasping organ for securing females during mating on water's surface, and from an aggregation of entomobryomorphan individuals (Proisotoma communis Sánchez-García & Engel, 2016) purportedly representing a swarming episode on the forest floor. We demonstrate that the mating behavioral repertoire in P. stoechus, which is associated with considerable morphological adaptations, likely implied elaborate courtship and maneuvering for guarantee sperm transfer in an epineustic species. These discoveries reveal significant behaviors consistent with modern counterparts and a generalized stasis for some ancient hexapod ethologies associated with complex mating and courtship and social or pre-social aggregations, so critical to specific constancy and dispersal

Two new Dicranocentrus from Nepal and a key to the Indian and Nepalese species (Collembola: Entomobryidae)

Volume: 57Start Page: 493End Page: 49

The taxonomic status of Alloscopus and redescriptions of its two species. (Collembola: Entomobryidae)

Volume: 53Start Page: 241End Page: 249,illust

A review of the genus Mastigoceras with remarks on its systematic position (Collembola: Entomobryidae)

Volume: 54Start Page: 43End Page: 4