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      A new species of Seira (Collembola: Entomobryidae: Seirini) from Northern Brazil, with the addition of new chaetotaxic characters

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          Abstract

          Seira caerucinerea sp. nov. , a new species of springtail from the Cerrado domain, state of Tocantins, Brazil, is described and illustrated. The new species is mainly characterized by bluish-gray coloration and dorsal chaetotaxy presenting macrochaeta S7 on head, three macrochaetae (a6, m6 and p6) on margin of metathorax and 4+4 macrochaetae (a1, m2, m3 and m4i) on abdomen I. Characteristics of maxillary and labial papillae, chaetotaxy of subcoxae, collophore, ventral region of head, ventral and lateral region of abdomen IV and V, which are usually omitted in species descriptions within the genus, are also provided. This is the first species of Seira described from the Cerrado domain, as well as the first record of the genus from the state of Tocantins.

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          Most cited references 20

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          The labial palp in collembola

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            Postembryonic development of the dorsal chaetotaxy in Seira dowlingi (Collembola, Entomobryidae); with an analysis of the diagnostic and phylogenetic significance of primary chaetotaxy in Seira

            Chaetotaxy is probably the most important character system used to diagnose species in Entomobryidae, but its use in studies of phylogenetic relationships of suprageneric taxa has been hampered by difficulties in identifying the homology of individual setae. Currently there is developmental information for three (Orchesella, Entomobrya sensu lato and Lepidocyrtus sensu lato) of the four largest groups of entomobryids. Seira is the only major genus for which the postembryonic development of the chaetotaxy has not been described. To fill this gap a complete description of the postembryonic development of the dorsal chaetotaxy of Seira dowlingi (Wray, 1953) is presented. Based on this description and by comparisons with up to 96 additional Seira species, it is suggested that the loss of second abdominal segment primary setae m4 and p4 (by transformation into scales during postembryonic development) is the only chaetotaxic character diagnostic for the genus. The posterior botriothricum (homologous to D3) on the fourth abdominal segment is absent only in S. (Afroseira) rowani Yosii, from South Africa. It is suggested that the presence of seta p3 and absence of p4 on the third abdominal segment support a more recent relationship between Seira and Lepidocyrtus/Pseudosinella than between Seira and Entomobrya sensu lato.
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              The Geography of Flowering Plants

               R. Good,  R. Good,  RA Good (1964)
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                zool
                Zoologia (Curitiba)
                Zoologia (Curitiba)
                Sociedade Brasileira de Zoologia (Curitiba )
                1984-4689
                October 2014
                : 31
                : 5
                : 489-495
                Affiliations
                [1 ] Instituto Nacional de Pesquisas da Amazônia Brazil
                [2 ] Universidade Federal do Rio Grande do Norte Brazil
                Article
                S1984-46702014000500009
                10.1590/S1984-46702014000500009
                Product
                Product Information: website
                Categories
                ZOOLOGY

                Animal science & Zoology

                Biodiversity, Cerrado, Seirinae, taxonomy, Tocantins

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