Myriapods constitute important edaphic macrofauna taxa which dwell in different trophic levels and influence the dynamics of these environments. This study evaluated the variation in composition, richness and abundance of edaphic myriapod assemblages as a function of the distribution and structure of flooded and non-flooded habitats (spatial variation) and hydrological seasonality (temporal variation) in a floodplain of the northern Pantanal region of Mato Grosso, Brazil. Sampling was carried out in three areas of the Poconé Pantanal, along an altitudinal and inundation gradient consisting of inundated and non-inundated habitats and different vegetation formations. Three quadrats (10 x 10 m) were delimited within each habitat type, where sampling was performed using pitfall traps and mini-Winkler extractors during the dry, rising water, high water and receding water periods of two hydrological cycles within the Pantanal (2010/2011 and 2011/2012). A total of 549 millipedes were collected, consisting of 407 Diplopoda and 142 Chilopoda distributed in six orders, 12 families and 20 species. The assemblages composition varied throughout the seasonal periods, indicating that the rising water and dry periods differed from the high water and receding water periods. In addition to the variation between seasonal periods, myriapod richness and abundance also varied in relation to areas consisting of different vegetation formations. Thus, it can be concluded that the hydrological seasonality associated with the inundation gradient and different vegetation types were determinant in the heterogeneous spatial and temporal distribution of myriapod assemblages, validating that the conservation of these invertebrates in the Pantanal is directly linked to the preservation of vegetation, and consequently, ecosystem integrity.
We describe Scolopocryptops
troglocaudatus
sp. n., a new troglobitic scolopocryptopine centipede species. The species was found in a remarkable siliciclastic karst area of Eastern Brazil, in three caves of the Chapada da Diamantina, in the state of Bahia. Scolopocryptops
troglocaudatus
sp. n. is close to Scolopocryptops
miersii Newport, 1845 and Scolopocryptops
ferrugineus
macrodon (Kraepelin, 1903) but differs from them by troglomorphic features, such as depigmentation, long appendages and a thin cuticle. This new species is the second troglobitic scolopocryptopine described and is the first discovered in Brazil.
The Tocantins 2007 Expedition of the Project “Aracnídeos e Miriápodes da Mata Atlântica” (AMMA) produced many new records of arachnids and centipedes, with 61 morphotypes identified. Among the results are: OPILIONES: 30 morphotypes with six new records of families and one of subfamily from Tocantins state; discovery of two undescribed species of Roquettea Mello-Leitão, 1931; Saramacia alvarengai Kury, 1997 is newly considered a junior subjective synonym of Saramacia annulata (Mello-Leitão, 1931); Brotasus Roewer, 1928 is transferred to Escadabiidae; the gonyleptid genera Parapachyloides Roewer, 1913 and Schubartesia B. Soares, 1944 are transferred to Gonyleptinae; SCHIZOMIDA: one species, new record of the order from Tocantins and from the Cerrado biome; SCORPIONES: seven species, one of them new record from Tocantins and two morphotypes; Chilopoda: 19 morphotypes, SCUTIGEROMORPHA: a widespread species Sphendononema guildingii (Newport, 1845) and another morphotype; GEOPHILOMORPHA: one morphotype; SCOLOPENDROMORPHA: 16 morphotypes, seven of them new records.
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