A new species of &lt;i&gt;Pachytrechodes&lt;/i&gt; Jeannel, 1960 (Coleoptera: Carabidae: Trechinae) from Tanzania, with a key to species

Belousov, Igor A.; Nyundo, Bruno A.

doi:10.11646/zootaxa.3637.1.7

Cited by 3 publications

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“…Finally, a remarkable isopod, Cantabroniscus primitivus Vandel, 1965, also occurs in La Gándara and is considered most closely related to the central American genus Typhlotricholigioides Rioja, 1953 from Mexico (Vandel 1965;Bellès 1987).…”

Section: Biogeographic History Of Trechodinamentioning

confidence: 99%

“…The Cantabro-Asturian area in north-western Spain is a hotspot of subterranean biodiversity, especially rich regarding ground beetles of the tribe Trechini (Bellès 1987;Labrada et al 2010;Ortuño & Gilgado 2010;Serrano 2013;Fresneda et al 2019). During the speleological exploration of a frequently visited cave system, La Gándara Cave (province of Cantabria, NW Spain), one of us (PB) collected a small troglobitic Trechinae at the bottom of an entrance pit, at −155 m. This specimen, although a female, was at first glance identified as a remarkable discovery, as its external morphology -and in particular the shape of the elytra -differed markedly from that of all species of Trechinae known from the area.…”

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A remarkable new genus of Iberian troglobitic Trechodina (Coleoptera: Carabidae: Trechinae: Trechini), with a revisited molecular phylogeny of the subtribe

Faille

Balart‐García

Fresneda

et al. 2021

Annales de la Société entomologique de France (N.S.)

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A new representative of the subtribe Trechodina, Iberotrechodes spinosus n. gen., n. sp., subterranean and known so far from a single cave system of the Cantabrian chain (NW Spain), is described. The external morphology of the new species is highly derived within Trechodina, in particular for the peculiar and unique shape of its elytra, and likely due in part to its subterranean habits. A phylogenetic analysis based on six nuclear and mitochondrial genes placed it unambiguously within the subtribe Trechodina of Trechinae, as sister to all extent species of Trechodes plus Sporades, distributed in Africa, Madagascar, Asia, New Caledonia and Australia. Using a Bayesian molecular clock approach we estimated the separation of Iberotrechodes n. gen. and its sister clade to have occurred in the early Paleocene, at ca. 61 Ma. The biogeographic implications of this discovery are discussed in the context of the unusual abundance of phylogenetically and geographically isolated species of subterranean Carabidae in the Iberian peninsula. Finally, new phylogenetic relationships are highlighted within Trechodina, such as the sister-group relationship between the genera Pachytrechodes (Tanzania) and Himalotrechodes (Nepal), and the African origin of the genus Amblystogenium (Crozet Islands). Résumé. :Un nouveau genre remarquable de Trechodina troglobie ibérique (Coleoptera : Carabidae : Trechinae : Trechini), avec une phylogénie moléculaire revisitée de la sous-tribu. Un nouveau représentant de la sous-tribu Trechodina, Iberotrechodes spinosus n. gen., n. sp., hypogé et connu à ce jour d´un seul système souterrain de la chaîne cantabrique (nord-ouest de l'Espagne), est décrit. La morphologie externe de la nouvelle espèce est fortement dérivée au sein des Trechodina en raison de son mode de vie souterrain et de la forme particulière et unique de ses élytres. Une analyse phylogénétique basée sur six gènes nucléaires et mitochondriaux place le nouveau genre sans ambiguïté au sein de la sous-tribu Trechodina (Trechinae), en tant qu'espèce soeur du clade Trechodes + Sporades, clade actuellement distribué en Afrique, à Madagascar, en Asie, en Nouvelle-Calédonie et en Australie. En utilisant une approche d'horloge moléculaire bayésienne, la séparation entre Iberotrechodes n. gen. et le clade-frère est datée du début du Paléocène, soit environ 61 millions d´années. Les implications biogéographiques de cette découverte sont discutées au regard de l'abondance inhabituelle d'espèces phylogénétiquement et géographiquement isolées de Carabidae souterrains de la péninsule Ibérique. Enfin, de nouvelles relations phylogénétiques sont mises en évidence au sein des Trechodina, comme la relation soeur entre les genres Pachytrechodes (Tanzanie) et Himalotrechodes (Nepal), et l´origine africaine du genre Amblystogenium (Archipel de Crozet).

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Section: Biogeographic History Of Trechodinamentioning

confidence: 99%

mentioning

confidence: 99%

A remarkable new genus of Iberian troglobitic Trechodina (Coleoptera: Carabidae: Trechinae: Trechini), with a revisited molecular phylogeny of the subtribe

Faille

Balart‐García

Fresneda

et al. 2021

Annales de la Société entomologique de France (N.S.)

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“…Studies of carabid beetles in Tanzania have been recorded by surveys carried out in the Uluguru Mountains by Basilewsky (1962Basilewsky ( , 1976, these were museum collections, and do not provide ecological information. Other available research include Zilihona and Nummelin (2000) and Zilihona et al (2004) that address the impact of Kihansi gorge construction in USNR, and Nyundo and Yarro (2007) on designing inventory methods, as well as Belousov and Nyundo (2013) on taxonomy of some new species in Udzungwa Mountain National Park. Therefore, there is limited information on the impact of ongoing activities on ground beetles in USNR.…”

Section: Introductionmentioning

confidence: 99%

Interface of biodiversity and ecosystem services: Does soil organic carbon correlate with the diversity of carabid beetles (Coleoptera: Carabidae) in the Uzungwa Scarp Nature Reserve, Tanzania?

Mwambala¹,

Nyundo²,

Kalumanga³

2019

Int. J. Biodivers. Conserv.

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Tropical forest soils have potential to mitigate climate change and support biodiversity. Human activities in these forests threaten biodiversity and alter the ability of the soil to sequester carbon. Many tropical countries experience rampant anthropogenic activities in the forests, yet the extent to which these activities affect biodiversity and soil organic carbon and the relationship between the two is not well studied. In this study, the correlation of soil organic carbon (SOC) and ground beetles was assessed in both control and disturbed sites in Uzungwa Scarp Nature Reserve (USNR). Disturbance activities included logging for timber, tool handles and building poles; fire, hunting, footpaths, collection of fuel wood, and clearing for agriculture. Pitfall trapping, active searching during the day, and active night searching were methods used to collect the ground beetles. Soil samples were collected at three depths 0-15, 15-30 and 30-45 cm in twelve plots: six in disturbed and six in control sites. A total of 890 ground beetles comprising 30 species were collected. The species richness of carabid beetles was high in the control sites (26 species) and low in disturbed site (16 species), with the respective Shannon-Wiener being Hꞌ= 2.103 and Hꞌ = 1.327. The difference in species diversity was statistically significant. Abundance of carabid beetles was also significantly higher in control sites compared to disturbed sites. Mean SOC was low in disturbed sites and high in control sites at all three depths. In disturbed sites, the correlation between SOC and species richness was weakly negative but not significant, and positively correlated with abundance, though it was not statistically significant. In control sites, there was a significant positive correlation between SOC and carabid abundance, but not with species richness of carabid beetles. To conclude, protection of natural forests is prerequisite for biodiversity and ecosystem services. We recommend that management improvement is urgently required, because ongoing human activities seem to contribute to diminished SOC stock.

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Seasonal dynamics of carabid beetles (Coleoptera: Carabidae) in areas with anthropogenic disturbances: The case of Uzungwa scarp nature forest reserve, Tanzania

Mwambala,

Nyundo

2024

Int J Trop Insect Sci

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Seasonal variation in diversity and community composition of ground beetles was investigated in the Uzungwa Scarp Nature Forest Reserve (USNFR), Tanzania. Carabid beetles were collected using three methods, namely pitfall traps, active day search and active night searching. Sampling of ground beetles was carried out in three seasons: dry season, wet season, and end of dry season in 2016, 2018 and 2019.Results showed that the diversity of ground beetles was highest during the wet season (Shannon-Wiener H' = 2.19) and lowest at the end of the dry season (H' = 1.83). The difference was statistically signi cant when comparing the end of dry season against the wet season, and between wet and dry season (t = 5.85 and 4.88, respectively, p < 0.05). Species richness was highest during the wet season and the difference was statistically signi cant among the three seasons (χ 2 = 13.46, p < 0.05). Abundance was highest during the wet season, with mean number of carabid beetles 1.256 ± 0.08 per sample, and lowest at the end of dry season (0.48 ± 0.05 individuals per sample). Kruskal-Wallis test revealed that the difference in abundance among the three seasons was statistically signi cant (H = 128.3, p < 0.05). Bray-Curtis similarity index showed low similarity in community composition among all three seasons. We conclude that ground beetles communities in anthropogenically disturbed areas vary with season, therefore to have a comprehensive sampling of ground beetles, sampling should cover at least one-year involving different seasons of the year.

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A new species of <i>Pachytrechodes</i> Jeannel, 1960 (Coleoptera: Carabidae: Trechinae) from Tanzania, with a key to species

Cited by 3 publications

References 1 publication

A remarkable new genus of Iberian troglobitic Trechodina (Coleoptera: Carabidae: Trechinae: Trechini), with a revisited molecular phylogeny of the subtribe

A remarkable new genus of Iberian troglobitic Trechodina (Coleoptera: Carabidae: Trechinae: Trechini), with a revisited molecular phylogeny of the subtribe

Interface of biodiversity and ecosystem services: Does soil organic carbon correlate with the diversity of carabid beetles (Coleoptera: Carabidae) in the Uzungwa Scarp Nature Reserve, Tanzania?

Seasonal dynamics of carabid beetles (Coleoptera: Carabidae) in areas with anthropogenic disturbances: The case of Uzungwa scarp nature forest reserve, Tanzania

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