Amazonas Chagas-Jr

Universidade Federal de Mato Grosso (UFMT) | UFMT · Departamento de Biologia e Zoologia

Saltational changes in segment numbers have likely occurred in arthropod evolution, especially if mechanisms of segment formation involve a multiplicative phase, as recently suggested in the evo-devo literature. Here we provide for the first time evidence of major phenotypic saltation in the evolution of segment number in a lineage of centipedes, w...

Of the two centipede orders that complete segmentation during embryogenesis, most species belonging to Geophilomorpha have an intraspecifically variable number of trunk segments, whereas those of the Scolopendromorpha have been assumed to have a fixed segment number, with minor variation (21 or 23 segments) across the group as a whole. Trunk segmen...

The biodiversity crisis we live in, marked by high extinction rates, requires well-planned conservation efforts. To overcome this issue, red lists of threatened species are recognized as the main objective approach for evaluating the conservation status of species and therefore guiding conservation priorities. This work focuses on the Myriapoda (Ch...

Epiperipatus edwardsii (Blanchard, 1847) is redescribed based on fresh material collected near the type locality. Additionally, five new species of velvet worms of the genus Epiperipatus Clark, 1913 from Brazil are described: Epiperipatus hyperbolicus sp. nov., Epiperipatus lucerna sp. nov., Epiperipatus titanicus sp. nov. (Holotypes deposited in M...

A new species of the widely distributed centipede genus Scolopocryptops Newport, 1845 is described from Trinidad based on light microscopic documentation. Scolopocryptops sukuyan n. sp. is remarkable for being the only centipede known to have 25 leg-bearing segments in the trunk. The new species resembles Scolocryptops melanostoma Newport, 1845 in...

The present work aims to describe a new species of Metaprosekia from siliciclastic caves from Caverna Nova and Caverna Ponte de Pedra, Utiariti Formation, Municipality of Diamantino, State of Mato Grosso. Metaprosekia utiariti n. sp. easily differs from the congeneric species in the shape of male pleopods 1 and 2. Moreover, a map illustrating the l...

We collected nine scutigeromorph centipede specimens in Colombia, which are the first records of Dendrothereua linceci (Wood, 1867) from the country and South America, expanding the the known distribution of the species. With these data, one more species of Scutigeromorpha centipede is added to the chilopod fauna of the region.

The diversity of freshwater triclads of the suborder Continenticola in the Neotropical region is poorly known, with few studies in South America. In this work, we describe two new cave-dwelling species of Girardia: G. corumbataiensis sp. nov. is described from a single sandstone cave located in an area covered by semi-deciduous vegetation, southeas...

A new monotypic subgenus Newportia (Andeocryptops) subgen. n is described based on 18 specimens of N. (A.) shelleyi sp. n. This form is endemic to the Colombian Andes showing the following unique combination of morphological features: very short and thin, a cylindrical and not segmented ultimate tarsus 2, a "spinning-spur" (see below) on the ultima...

Defensive secretions of millipedes are remarkable for containing toxic quinones known to efficiently repell hematophagous arthropods. Here we show that Endangered blonde capuchin monkeys make use of such secretions. We (i) describe the anointing behavior performed by the monkeys (ii) identify the millipede species used in the process (iii) describe...

The type material of Sogona cyclareata Attems, 1947 is revised. The syntype shares characters with representatives of the family Schendylidae and not the Geophilidae to which it is currently assigned. The species has the claw of the second maxillae pectinate and the labrum not divided into median and lateral portions. Sogona cyclareata presents als...

Este compêndio de trabalhos técnico-científicos elaborados na Gerência de Espeleologia e Tecnologia trata-se de uma síntese dos principais artigos publicados em periódicos nacionais e internacionais e congressos científicos entre os anos de 2018 e 2019. No intuito de se aprimorar os conhecimentos da dinâmica e funcionamento dos ecossistemas cavern...

Red Listing of Threatened species is recognized as the most objective approach for evaluating extinction risk of living organisms which can be applied at global or national scales. Invertebrates account for nearly 97% of all animals on the planet but are insufficiently represented in the IUCN Red Lists at both scales. To analyze the occurrence of s...

Centipedes are terrestrial arthropods present in several microhabitats worldwide. They present nocturnal and cryptobiotic habits, and are considered an advantageous group for colonization of subterranean habitats for presenting pre-adaptations to this environment. The order Geophilomorpha is currently represented by 13 families, seven occur in Braz...

The State of Mato Grosso covers 141 municipalities, of which 69 have registered natural cavities. The present study aimed to collect preliminary data about the faunistic diversity of sandstone caves in the municipality of São José do Rio Claro. The research was carried out by means of collections on different substrates. A total of 2,496 individual...

Schendylops janelao sp. n. is described from a limestone cave located in eastern Brazil. There are several reports of geophilomorphs in Brazilian caves, however, the new species represents the first troglobite species for South America and the first for Gruta do Janelão Cave, northern Minas Gerais State. Schendylops janelao sp. n. is described base...

The State of Mato Grosso covers 141 municipalities, of which 69 have registered natural cavities. The present study aimed to collect preliminary data about the faunistic diversity of sandstone caves in the municipality of São José do Rio Claro. The research was carried out by means of collections on different substrates. A total of 2,496 individual...

We identified Basidiobolus fungi on geophilomorphan centipedes (Chilopoda) from caves of Southeast Brazil. Twelve specimens of centipedes of the family Geophilidae were examined, and two of them carried the secondary capilliconidia of Basidiobolus on their exoskeleton. The fungus uses the surface of the exoskeleton as a support for the asexual repr...

The edaphic fauna plays an important role in the organic matter dynamics of the soil. Millipeds (Diplopoda), centipeds (Chilopoda) and isopods (Isopoda) are among the main components of the soil fauna. Vegetation structure represents one of the main factors influencing composition and diversity of these species that inhabit leaf litter and soil, wh...

The Brazilian Pantanal biome is one of the largest and most important floodplains in the world by virtue of its biodiversity and indispensable ecological services on local, regional, and global scales. Despite this importance, many gaps remain concerning its biodiversity as well as its generation and maintenance mechanisms. In view of expanding the...

Zootaxa 4425 (1): 153-164 Abstract Scolopendra arthrorhabdoides Ribaut, 1913 is redescribed based on fresh material. Its taxonomic status is evaluated and compared with Scolopendra armata Kraepelin, 1903 and Scolopendra alternans Leach, 1816. The geographical distribution of S. arthrorhabdoides is also revised. Scolopendra armata is reported from C...

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 variat...

Five Newportia species with a claw-shaped pretarsus of the ultimate legs are revised. Newportia amazonica Brolemann, 1904, N. unguifer Chamberlin, 1921, and N. pilosa González-Sponga, 1997 are redescribed; N. tetraspinae González-Sponga, 1997 is considered to be a junior synonym of N. unguifer, and N. guaiquinimensis González-Sponga, 2000 is consid...

Myriapoda threatened species geographic coordinates

Trabalho realizado com os alunos de graduação do Bacharelado e Licenciatura em Ciências Biológicas da UFMT. O trabalho mostra como a aula de campo contribuiu para consolidar a compreensão sobre a morfologia e biologia dos artrópodes, dos métodos de coleta e do uso de ferramentas para identificação das espécies.

This study revises centipede fauna found in Brazilian caves, focusing on troglomorphic taxa and emphasizing conservation status. We present 563 centipede specimens from 274 caves across eleven Brazilian states. Of these, 22 records were derived from existing literature and 252 are newly collected. Specimens represent four orders, ten families, 18 g...

This study presents the diversity and distribution of myriapod species associated with different habitats in a seasonally flooded forest composed predominantly of Vochysia divergens Pohl. (Vochysiaceae) in the Brazilian Pantanal. We evaluated species richness distribution across habitats and over different seasonal periods, and also identified poss...

In this paper we have analyzed the Brazilian red list of threatened species of Chilopoda and Diplopoda and the implications for its conservation.

In this work a type specimen of Newportia amazonica is redescribed and some taxonomic notes of some species of Newportia are proposed.

Studies related to centipede feeding and predatory behavior are rare in the literature, and are limited to obser- vations made during fieldwork. Furthermore, they lack descriptions of prey capture. We conducted a laboratory experiment using South American specimens of Scolopendra viridicornis Newport, 1844 (n = 5), Otostigmus tibialis Brölemann, 19...

The type material of O. brunneus Chamberlin, 1921, O. casus Chamberlin, 1914, O. clavifer Chamberlin, 1921, O. cooperi Chamberlin, 1942, O. occidentalis Meinert, 1886, O. rex Chamberlin, 1914, O. samacus Chamberlin, 1944, O. scabricau- da (Humbert & Saussure, 1870), O. suitius Chamberlin, 1914, and O. therezopolis Chamberlin, 1944, are revised. The...

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 Sc...

Onychophora have undergone a new wave of taxonomic revisions in the last three years. After a recent revision, only two species of Macroperipatus are registered from Brazil: Macroperipatus ohausi and Macroperipatus geayi. The former was only the second species of Onychophora to be described from Brazil, and is herein redescribed, illustrated, and i...

This study presents an updated list of centipedes of the orders Scutigeromorpha and Scolopendromorpha from Colombia based on data from the literature, the World Catalogue of Centipedes (CHILOBASE), and specimens examined in museum collections. Four families, nine genera, 37 species and four subspecies are listed. One species belongs to Scutigeromor...

Onychophora have undergone a new wave of taxonomic revisions in the last three years. After a recent revision, only two species of Macroperipatus are registered from Brazil: Macroperipatus ohausi and Macroperipatus geayi. The former was only the second species of Onychophora to be described from Brazil, and is herein redescribed, illustrated, and i...

Seven species of the genus Rhysida Wood, 1862 from Venezuela and one subspecies from Peru described by Manuel Angel González Sponga and Wolfgang Bücherl respectively, are revised. Rhysida caripensis González-Sponga, 2002, Rhysida neoespartana González-Sponga, 2002, Rhysida guayanica González-Sponga, 2002, Rhysida maritima González-Sponga, 2002, Rhy...

Three new species of Otostigmus Porat, 1876 from Brazilian Atlantic Forest are described. Otostigmus beckeri sp. n. and O. lanceolatus sp. n. are described from the state of Bahia and O. giupponii sp. n. from the state of Espírito Santo. In Brazil, the otostigmine scolopendrid genus Otostigmus comprises 22 species. A summary of Brazilian Otostigmus...

The neotropical genus Tidops Chamberlin, 1915 is reviewed and its geographical distribution is extended. The genus is now composed of four species – T. simus Chamberlin, 1915, T. collaris (Kraepelin, 1915), T. balzanii (Silvestri, 1895), and a new species described from the state of Bahia, in Brazil, named as Tidops nisargani. An amended diagnosis...

The scolopocryptopine centipedes from Fiji Islands are revised. Two species belonging to the genus Scolopocryptops - S. aberrans (Chamberlin, 1920) and S. melanostoma Newport, 1845 - are recorded. Scolopocryptops aberrans is redescribed and illustrated for the rst time. Scolopocryptops miersii jiensis is a junior subjective synonym of S. aberrans,...

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 resultsare: OPILIONES: 30 morphotypes with six new records of families and one of subfamily from Tocantinsstate; discovery of two undescribed species of Roque...

Here we report the first case of a sea anemone, Bunodosoma caissarum Corrêa, 1964, eating a scolopendromorph centipede, Otostigmus scabricauda Humbert & Saussure, 1870.