Porcellionides cingendus (Kinahan, 1857)

Cifuentes, Julio & Da Silva, Luís P., 2024, Revision of the genus Porcellionides Miers, 1877 (Isopoda: Porcellionidae) in the Ibero-Balearic region, European Journal of Taxonomy 939, pp. 1-51 : 4-8

Porcellionides cingendus (Kinahan, 1857)

Figs 1 , 2A , 3A , 4A–D , 5, Table 1

Porcellio cingendus Kinahan, 1857: 279 , figs 1–2, 4, 6, 8–9.

Metoponorthus simplex Budde-Lund, 1885: 188 .

Porcellio lusitanorum Arcangeli, 1935: 21 , figs 13–18.

Metoponorthus cingendus – Vandel 1946: 274, figs. 91–97.

Porcellionides simplex – Stebbing 1911: 188.

Material examined

PORTUGAL – Aveiro • 1 ♀; Barcouço ; 40.3084° N, 8.4705° W; 27 Oct. 2022; L.P. Da Silva leg.; LPS472 • 1 ♀; Calvão ; 40.4650° N, 8.7003° W; 24 Dec. 2021; L.P. Da Silva leg.; LPS11 • 1 ♂; Cruz Alta, Serra do Bussaco ; 40.3691° N, 8.3607° W; 23 Dec. 2022; L.P. Da Silva leg.; LPS614 • 1 ♂; Cruz Alta, Serra do Bussaco ; 40.3689° N, 8.3607° W; 23 Dec. 2022; L.P. Da Silva leg.; LPS616 • 1 ♀; Gafanha da Boa Hora ; 40.5313° N, 8.7686° W; 26 Nov. 2022; L.P. Da Silva leg.; LPS512 • 1 ♀; Grada ; 40.2974° N, 8.4736° W; 24 Dec. 2021; L.P. Da Silva leg.; LPS13 . – Braga • 1 ♂; Fão, restinga do Cavado ; 41.5334° N, 8.7903° W; 17 Dec. 2022; L.P. Da Silva leg.; LPS593a • 1♀; same collection data as for preceding; LPS593b . – Bragança • 1 ♀; Castrelos ( Baceiro River ); 41.8375° N, 6.8926° W; 26 Jun. 2022; L.P. Da Silva leg.; LPS405 • 1 ♀; Sendas ; 41.6042° N, 6.8581° W; 15 Sep. 2022; L.P. Da Silva leg.; LPS446 • 1 ♀; Sernande ( Rabaçal River ); 41.9335° N, 7.1508° W; 25 Jun. 2022; L.P. Da Silva leg.; LPS396 • 1 ♀; Sernande ( Rabaçal River ); 41.9337° N, 7.1510° W; 25 Jun. 2022; L.P. Da Silva leg.; LPS401 . – Castelo Branco • 1 ♂; Trigais ; 40.2435° N, 7.7145° W; 18 Mar. 2023; L.P. Da Silva leg.; LPS749 . – Coimbra • 1 ♂; Murraceira Island ; 40.1390° N, 8.8445° W; 28 Dec. 2021; L.P. Da Silva leg.; LPS15 • 1 ♂; Murraceira Island ; 40.1381° N, 8.8377° W; 6 Mar. 2022; P. Da Silva leg.; LPS124 • 2 ♂♂; Serra da Boa Viagem ; 40.1891° N, 8.9023° W; 26 Dec.2022; L.P. Da Silva leg.; LPS632a • 1 ♀; same collection data as for preceding; LPS632b • 1 ♀; Vale Soeiro ; 40.3121° N, 8.4041° W; 20 Feb. 2022; L.P. Da Silva leg.; LPS109 . – Leiria • 1 ♂; A-dos-Negros ; 39.3571° N, 8.0921° W; 19 Feb. 2022; L.P. Da Silva leg.; LPS94 • 1 ♂; A-da-Gorda; 39.3483° N, 8.1588° W; 8 Apr. 2022; L.P. Da Silva leg.; LPS215 • 1 ♂; Alvito ; 40.006° N, 8.5651° W; 3 Jul. 2022; L.P. Da Silva leg.; LPS429 • 1 ♀; Casa da Moura ; 39.3263° N, 9.2489° W; 19 Feb. 2022; L.P. Da Silva leg.; LPS97 • 1 ♀; Casa da Moura ; 39.3262° N, 9.2489° W; 19 Feb. 2022; L.P. Da Silva leg.; LPS98 • 1 ♀; Casa da Moura ; 39.3263° N, 9.2487° W; 19 Feb. 2022; L.P. Da Silva leg.; LPS99 • 1 ♀; Pia do Urso ; 39.5985° N, 9.7172° W; 11 Mar. 2022; L.P. Da Silva leg.; LPS142 . – Portalegre • 3 ♂♂; Sobral ; 39.2777° N, 7.3086° W; 2 Dec. 2022; L.P. Da Silva leg.; LPS537a • 3 ♀♀; same collection data as for preceding; LPS537b • 1 ♂; same collection data as for preceding; LPS539 . – Porto • 1 ♀; Vairão ; 41.3289° N, 8.6733° W; 30 Sep. 2022; L.P. Da Silva leg.; LPS458 . – Viana do Castelo • 1 ♀; Portelinha ; 42.0521° N, 8.1689° W; 24 Mar. 2022; L.P. Da Silva leg.; LPS181 . – Vila Real • 1 ♂; Ribeira de Pena ; 41.5111° N, 7.7960° W; 30 May 2022; L.P. Da Silva leg.; LPS475a • 1 ♀; same collection data as for preceding; LPS475b . – Viseu • 1 ♀; Curvaceira ; 41.1447° N, 7.8120° W; 3 Sep. 2022; L.P. Da Silva leg.; LPS444 .

SPAIN – Álava • 1 ♂; Izarra ; 5 Feb. 1984; J. Cifuentes leg.; JC138 • 1 ♂; Izarra ; 16 Feb. 1984; J. Cifuentes leg.; JC104. – Asturias • 2 ♂♂, 3 ♀♀; Llanes, Purón ; 22 May 1982; E. Ortiz de Vega leg.; MNCN 20.04/11972 • 1 ♂; Pembes ; 5 Aug. 1984; J. Cifuentes leg.; JC190. – Cantabria • 1 ♀; Pechón ; 30 Oct. 1986; E. Ortiz de Vega leg.; MNCN 20.04/11999 • 1 ♀; Santander ; 22 Jul. 1954; Fuentes leg.; MNCN 20.04/12110 • 1 ♂; Urdón ; 31 Jul. 1954; S.V. Peris leg.; MNCN 20.04/11977 • 1 ♀; Villaverde de Pontones ; 3 Jul. 1954; S.V. Peris leg.; MNCN 20.04/11982 . – Coruña • 1 ♀; El Burgo; 10 Aug. 1892; MNCN 20.04/9515 . – Lugo • 4 ♀♀; Cruz do Incio ; Aug. 2022; A. Maceda leg.; JC809-JC812 . – Navarra • 2 ♂♂, 3 ♀♀; Barañain ; 20 Nov. 2019; J. Cifuentes leg.; JC410 . – Vizcaya • 3 ♂♂, 4 ♀♀; Somorrostro, Punta de Musqués ; Oct. 1979; A. Pollo leg.; MNCN 20.04/11859 .

Remarks

As indicated by Vandel (1946), individuals of this species can exhibit various types of coloration, ranging from very dark to reddish, and even depigmented individuals, although the most common specimens are yellowish with brown pigmented areas ( Fig. 1A–B ). This species can be recognized by the weak and flat granulations on the dorsal side of the tergites ( Table 1 ). The b/c coordinates stand out as one of the highest among the studied species ( Fig. 1C ). This is primarily attributed to the anterior location of the noduli on the tergite. The d/c coordinates and its relation with b/c are the lowest among the studied species ( Figs 1C , 2A ), with the noduli situated very close to the lateral edge on all pereonites, showing little variation in d/c coordinates ( Fig. 1C ). On the dorsal side of the integument, there are triangular scales arranged in a circle and triangular scale-setae with a very long and sharp tip ( Fig. 3A ). The antennas are slender, with the first segment on the flagellum slightly smaller than the second. The pleon is highly retracted in relation to the pereon ( Fig. 1A–B ). The pereonites II to VII have a transverse ridge ( Fig. 1A–B ). The exopods of the pleopods I and II in both sexes have a notch ( Figs 1D–E , 4A–D ), and in males, the carpus of the pereopods 1 and 3 have a brush of setae, and the exopod I is triangular, with a large and rounded posterior inner tip ( Figs 1D , 4A ).

Distribution

Portuguese districts of Braga: Joane ( Vandel 1946), Serra do Gerez ( Vandel 1946, 1962); Coimbra: Luso ( Arcangeli 1936, as Porcellio lusitanorum Arcangeli, 1936 ) and Mata do Buçaco ( Vandel 1946); Leiria: Aljubarrota, Lagoa do Cão and Serra de Minde ( Vandel 1946); Lisboa: Cavadal and Sintra ( Vandel 1946); Porto: Regoa ( Arcangeli 1936 as Porcellio lusitanorum Arcangeli, 1936 ), Boa Nova, Monte Pedral, Rio Tinto and São Pedro da Cova ( Vandel 1946); Viana do Castelo: Britelo, Castanheira, central de Lindoso, Minho, Vascões and Vila Praia de Âncora ( Gregory et al. 2012). It has been also reported from the Spanish provinces of Asturias: without locality ( Vandel 1962); Cantabria: Potes ( Dollfus 1892) and San Román ( Vivar et al. 1984); Coruña: Finisterre ( Cifuentes 2019) and Villa Rutis ( Dollfus 1893); Orense: Avión, Beade, Beiro ( Gregory et al. 2012), Los Peares ( Schmölzer 1955a, 1971) and Sobradejo ( Schmölzer 1955a, 1971); Pontevedra: Amorin, As Eiras, Bayona, Camposancos, Goján, Oia and Puerto de Moncelos ( Gregory et al. 2012); Vizcaya: Larrabasterra, Lendoño de Arriba, Orduña, Plencia and Urduliz ( Vivar et al. 1984).

It is recorded for the first time in the Portuguese districts of Aveiro, Bragança, Castelo Branco, Portalegre, Vila Real and Viseu, and the Spanish provinces of Álava, Lugo and Navarra ( Fig. 5 ).

Figures

Fig. 1. Porcellionides cingendus (Kinahan, 1857). A–B. Habitus. A. ♀ (LPS11). B. ♂ (LPS215). C. Noduli laterales coordinates. D–E. ♂ (LPS215). D. Exopod I. E. Exopod II. Scale bars: A–B = 1 mm; D–E = 0.1 mm.

Fig. 2. Relation between noduli laterales coordinates (following Vandel 1960) d/c (y-axis) and b/c (x-axis) multiplied by 100 for all studied species. A. Porcellionides cingendus (Kinahan, 1857). B. Porcellionides elegans(Pollo Zorita, 1982). C. Porcellionides fuscomarmoratus(Budde-Lund, 1885). D. Porcellionides glaber (Koch, 1856). E. Porcellionides hispanus (Vandel, 1953). F. Porcellionides lucasioides (Vandel, 1953). G. Porcellionides lusitanus (Vandel, 1946). H. Porcellionides molleri (Verhoeff, 1901). I. Porcellionides pruinosus (Brandt, 1833). J. Porcellionides sexfasciatus (BuddeLund, 1885). K. Porcellionides ibericus sp. nov. L. P. sexfasciatus and its previously considered subspecies: P. glaber (g), P. hispanus (h), P. lucasioides (l), P. lusitanus (lu), P. molleri (m) and P. sexfasciatus (s).

Fig. 3. Scale-setae. A. Porcellionides cingendus (Kinahan, 1857), ♂ (JC104). B. Porcellionides elegans (Pollo Zorita, 1982), ♂ (MNCN 20.04/7306). C. Porcellionides fuscomarmoratus (BuddeLund, 1885), ♀ (MNCN 20.04/8129). D. Porcellionides glaber (Koch, 1856), ♀ (MNCN 20.04/11490). E. Porcellionides hispanus (Vandel, 1953), ♂ (MNCN 20.04/7163). F. Porcellionides lucasioides (Vandel, 1953), ♂ (JC352). G. Porcellionides lusitanus (Vandel, 1946), ♂ (LPS661). H. Porcellionides molleri (Verhoeff, 1901), ♀ (LPS135). I. Porcellionides pruinosus (Brandt, 1833), ♀ (JC318). J. Porcellionides sexfasciatus (Budde-Lund, 1885), ♂ (LPS455a). Scale bar = 0.01 mm.

Fig. 4. Pleopods. A–D. Porcellionides cingendus (Kinahan, 1857). A–B. ♂ (LPS215). A. Exopod I. B. Exopod II. C–D. ♀ (MNCN 20.04/11972). C. Exopod I. D. Exopod II. E–H. Porcellionides elegans (Pollo Zorita, 1982). E–F. ♂ (JC490). E. Exopod I. F.Exopod II. G–H. ♀ (MNCN 20.04/9590). G. Exopod I. H. Exopod II. I–L. Porcellionides fuscomarmoratus (Budde-Lund, 1885). I–J. ♂ (UGMSS-2). I. Exopod I. J. Exopod II. K–L. ♀ (MNCN 20.04/8129. K. Exopod I. L. Exopod II. M–P. Porcellionides glaber (Koch, 1856). M–L. ♂ (MNCN 20.04/7886). M. Exopod I. N. Exopod II. O. ♀ (MNCN 20.04/11490), exopod I. P. ♀ (MNCN 20.04/11490), exopod II. Q–T. Porcellionides hispanus (Vandel, 1953). Q–R. ♂ (MNCN 20.04/7163). Q. Exopod I. R. Exopod II. S–T. ♀ (JC380). S. Exopod I. T. ♀ (JC380), exopod II. Scale bars = 0.1 mm.

Fig. 5. Localization of the Ibero-Balearic region in Europe and the distribution of Porcellionides cingendus (Kinahan, 1857).