Dorsal Chaetotaxy Of Head Research Articles

First partial mitogenome of a new Seira Lubbock species (Collembola,br /Entomobryidae, Seirinae) from Cambodia reveals a possible separate br /lineage from the Neotropical Seirinae.

A new species of Seira from Koh Rong Sanloem Island, Cambodia, as well as its mitochondrial genome information, are herein described. Seira sanloemensis sp. nov. has a similar colour pattern compared to nine other species of Seira worldwide distributed, but the dorsal chaetotaxy is more similar to S. arunachala Mitra from India, S. camgiangensis Nguyễn from Vietnam, and S. gobalezai Christiansen Bellinger from Hawaii. However, the new species differs from these species by dorsal chaetotaxy of head, Th II-III and Abd II, collophore chaetotaxy, and morphology of the empodial complex. This is the third Collembola species described for Cambodia. Its assembled incomplete mitogenome from MGI reads, has a length of 13,953 bp, and contains all protein-coding genes except for tree tRNAs missing; the gene order is the same of the Pancrustacean ancestral gene order. Based on the alignment of the 13 coding genes, a maximum likelihood phylogenetic tree of medium bootstrap values suggested that the Asian Seira species can represent a different lineage from the Neotropical Seirinae, but further biogeographic and divergence estimation analyses plus the inclusion of more Asian taxa are necessary to test such hypothesis.

A new endemic species of Willowsia from Florida (USA) and descriptive notes on all New World Willowsia (Collembola: Entomobryidae).

Four species of Willowsia have been reported from the Americas (W. buski, W. jacobsoni, W. mexicana, and W. nigromaculata), and to date, W. mexicana is the only member of the genus endemic to the New World. Here, Willowsia pyrrhopygia sp. nov. from Florida is described. Like W. mexicana, this new species has a native New World distribution and uninterrupted rib scale type, but can be separated by color pattern and chaetotaxy. Dorsal head chaetotaxy and other descriptive notes are provided to compliment to descriptions for W. buski, W. jacobsoni, W. mexicana, and W. nigromaculata. Comparative morphological analysis also reveals two unique character states among Entomobryinae-the outer maxillary lobe with two (not three) sublobal hairs and the absence of labial triangle seta r-shared only by endemic New World Willowsia and Americabrya, providing preliminary support for their independent evolution from a common New World ancestor.

New species of Lepidocyrtus Bourlet and Entomobrya Rondani (Collembola: Entomobryoidea: Entomobryidae) from Brazil.

The taxonomic comprehension of Brazilian entomobryids had several contributions during the last decade, but the absence of detailed chaetotaxic schemes to most of endemic species difficult identifications and probably hides undescribed species in surveys across the country. Herein we describe two new species of the family and provide detailed dorsal chaetotaxy of them, in hope to guide future identifications and descriptions within the genera in Brazil and Neotropical Region. Lepidocyrtus sotoi sp. nov. is possibly more related to L. biphasis due to the lack of antennal and leg scales, but presents a unique dorsal head chaetotaxy among the Neotropical species of the genus. Entomobrya bahiana sp. nov. presents an uncommon color pattern and dorsal chaetotaxy in Th. II-III, Abd. II and IV when compared to other Entomobrya spp. from Neotropical Region.