Trichoniscoides machadoi Vandel, 1946

Eusébio, Rita P., Taiti, Stefano & Reboleira, Ana Sofia P. S., 2025, Terrestrial isopods (Crustacea, Isopoda, Oniscidea) from Mesovoid Shallow Substratum habitats of Portugal, Subterranean Biology 53, pp. 129-153 : 129-153

Trichoniscoides machadoi Vandel, 1946

Fig. 6 A

Trichoniscoides machadoi Vandel, 1946: 168, figs 8–12; Vandel 1947: 270; Vandel 1948: 129, fig. 14; Vandel 1952: 262, figs 2, 9; Schmölzer 1965: 37, figs 79–82; Schmölzer 1971: 4, 75, 139, map 4; Schmalfuss 2003: 303; Reboleira et al. 2015: 6, fig. 2; Cifuentes 2019: 48; Cifuentes and Da Silva 2023: 7.

Material examined.

Portugal – Sicó • 2 ♂♂, 3 ♀♀; 39°58'51.8"N, 8°33'13.1"W; 19.XII.2022; leg. R. P. Eusébio; MSS pitfall trap; MNHNC: MB 11: 001283 , 001285, 001287 • 1 ♀; 20.III.2023; same data as for preceding; MNHNC: MB 11: 001379 . – Arrábida • 1 ♂, 2 ♀♀; 38°28'59.2"N, 9°00'09.9"W; 21.VII.2022; leg. R. P. Eusébio; MSS pitfall trap; MNHNC: MB 11: 001141 • 3 ♂♂; 22.III.2023; same data as for preceding; MNHNC: MB 11: 001313 , 001323 .

Distribution.

Endemic to Portugal. This species is widely distributed throughout the country.

Ecological notes.

This species can be found in caves, MSS, and endogean habitats.

Seasonal patterns in Portuguese MSS habitats.

This species was found in two locations, Sicó and Arrábida. In Sicó it was captured during fall and winter, with a higher abundance in fall (Fig. 7 A ). In Arrábida it was captured during spring and fall in equal abundances (Fig. 7 A ).

Figures

Figure 6. Specimen habitus A Trichoniscoides machadoi from Sicó B Ctenoscia minima from Montejunto C Porcellionides cingendus from Sicó D Porcellio scaber from Serra da Estrela E Porcellio dilatatus from Arrábida F Porcellio dispar from Sicó G Porcellio novus from Alcobertas H Eluma caelata from Montejunto I Eluma tuberculata from Sicó J Eluma matae from Montejunto K Eluma cristata sp. nov. from Alcobertas L Armadillo officinalis from Arrábida.

Figure 7. Total abundance per season for each of the species. Each colour represents one sampling location: blue – Serra da Estrela, purple – Sicó, pink – Alcobertas, orange – Montejunto, yellow – Arrábida A Trichoniscoides machadoi B Ctenoscia minima C Porcellionides cingendus D Porcellio scaber E Porcellio dilatatus F Porcellio dispar G Porcellio novus H Eluma caelata I Eluma tuberculata J Eluma matae K Eluma cristata sp. nov. L Armadillo officinalis.