Porcellionides pruinosus (Brandt, 1833)

Figs 2I, 3I, 15M–P, 21–22, Table 1

Porcellio swammerdamii Audouin, 1826: 289, fig. 6.

Porcellio pruinosus Brandt, 1833: 178 .

Porcellio punctatus Brandt, 1833: 180 .

Porcellio maculicornis Koch, 1841: 34 .

Porcellio uniformis Koch, 1841: 34 .

Porcellio frontalis Lereboullet, 1853: 63, figs 17, 81–87.

Porcellio immaculatus Fitch, 1855: 120 .

Porcellio zealandicus Miers, 1876: 226 .

Porcellio flavovittatus Miers, 1878: 669, plate 68, fig. 4.

Porcellio jelskii Miers, 1878: 668, plate 68, fig. 3.

Metoponorthus meleagris Budde-Lund, 1885: 168 .

Metoponorthus nigrobrunneus Budde-Lund, 1896: 47 .

Metoponorthus schwencki Moreira, 1927: 195, figs 4–6.

Metoponorthus anatolicus Verhoeff, 1941: 235, fig. 16.

Porcellionides bagnalli Collinge, 1942: 648 .

Porcellionides breviramus Shen, 1949: 50, fig. e.

Metoponorthus pruinosus – Budde-Lund 1885: 169.

Metoponorthus swammerdamii – Budde-Lund 1885: 172.

Porcellionides anatolicus – Stebbing 1911: 188.

Porcellionides meleagris – Stebbing 1911: 188.

Porcellionides nigrobrunneus – Stebbing 1911: 188.

Porcellionides schwencki – Stebbing 1911: 188.

Porcellionides swammerdamii – Stebbing 1911: 188.

Material examined

PORTUGAL – Braga • 1 ♀; Vila Nova de Famalicão; 41.4104° N, 8.5206° W; 28 Aug. 2022; L.P. Da Silva leg., LPS435 . – Beja • 1 ♀; Mértola; 37.6391° N, 7.6623° W; 12 Apr. 2022; L.P. Da Silva leg.; LPS249 . – Coimbra • 1 ♂; Coimbra, Jardim Botânico da Universidade de Coimbra; 41.2056° N, 8.4224° W; 17 Jun. 2022; L.P. Da Silva leg.; LPS370 • 1 ♀; Coimbra, Jardim Botânico da Universidade de Coimbra; 41.2071° N, 8.4214° W; 17 Jun. 2022; L.P. Da Silva leg.; LPS385 • 1 ♀; Praia de Mira; 41.4586° N, 8.8021° W; 21 May 2022; L.P. Da Silva leg.; LPS310 . – Guarda • 1 ♂; Longroiva; 28 Mar. 2023; L.P. Da Silva leg.; LPS756 . – Porto • 1 ♀; Vila do Conde; 41.3420° N, 8.7517° W; 23 Feb. 2022; L.P. Da Silva leg.; LPS111 . – Viana do Castelo • 1 ♀; Vila Nova de Cerveira; 41.9370° N, 8.7498° W; 11 Jun. 2022; L.P. Da Silva leg.; LPS361 . – Vila Real • 3 ♂♂; Alijó; 41.2783° N, 7.4764° W; 25 Jan. 2022; L.P. Da Silva leg., LPS30 .

SPAIN – Asturias • 2 ♂♂; Gijón; E. Rioja leg.; MNCN 20.04/7394. – Ávila • 1 ♀; Arévalo; 12 Apr. 1979; M.T. Sanz leg.; MNCN 20.04/14239. – Cuenca • 2 ♂♂, 2 ♀♀; Albalate de las Nogueras; 24 Oct. 1980; A. Pollo leg.; MNCN 20.04/7166 • 7 ♂♂; Las Majadas; 23 Oct. 1980; A. Pollo leg.; MNCN 20.04/6360. – Guadalajara • 1 ♀; Sigüenza, 18 Jul. 1986; J. Cifuentes leg.; JC318 . – Madrid • 1 ♀; Madrid; 12 Apr. 1979; R.M. Segovia del Rey leg.; MNCN 20.04/12378 • 2 ♀♀; Madrid; 22 Nov. 1953; E. Ortiz de Vega leg.; MNCN 20.04/14234. – Málaga • 1 ♂, 7 ♀♀; Málaga; Jan. 1917; O. de Buen y del Cos leg.; MNCN 20.04/9498 • 1 ♂; Maro Cueva Nerja; 27 Jan. 2018; J. Cifuentes leg.; JC340 • 1 ♂, 2 ♀♀; Maro Cueva Nerja; 11 Apr. 2019; J. Cifuentes leg.; JC383 • 2 ♀♀; same collection data as for preceding; JC385 • 2 ♂♂, 4 ♀♀; same collection data as for preceding; JC386 . – Murcia • 1 ♀; Puerto de Mojantes; 10 Jun. 1986; A. Blasco leg.; CRBA-91169 . – Navarra • 1 ♂, 2 ♀♀; Caparroso; 29 May 1983; J. Cifuentes leg.; cited by Cifuentes (1984); JC114 • 1 ♀; same collection data as for preceding; cited by Cifuentes (1984); JC141 • 5 ♀♀; Barañain; 13 Mar. 1981; JC leg., JC42. – Soria • 1 ♂, 2 ♀♀; Medinaceli; 11 Apr. 1985; J. Cifuentes leg.; JC153. – Toledo • 1 ♂, 1 ♀; Toledo; 12 Nov. 1986; MNCN 20.04/9923 .

Remarks

This is a well-known species, so we provide only brief details. The dorsal side of the integument exhibits small, flat granulations (Fig. 21A). The d/c coordinates decrease from the first to the last pereonite, showing greater variation than the b/c coordinates (Figs 2I, 21B). The scale-setae are triangular, elongated, and sharply pointed surrounded by characteristic small scales that are arranged in a distinct pattern (Fig. 3I). The glandular fields are very small with very few pores (Table 1). On the cephalon, the lateral lobes are small. There is no transverse ridge on the pereonites. The first segment of the antenna flagellum is twice the size of the second. In males, the carpus of the pereopod 1 has a brush of setae, the exopod of the pleopod I has a short, wide, rounded, or slightly pointed posterior inner tip (Figs 15M, 21C), and the exopod of the pleopod II has a very long and slender posterior inner tip (Figs 15N, 21D). In females, the exopods of the pleopods I and II resemble those of other studied species (Fig. 15O–P).

Distribution

Originally from the Mediterranean, it has become cosmopolitan due to human activity (Vandel 1962; Schmalfuss 2003). Reported from the Portuguese districts of Évora: Estremoz-Cano Massif (Reboleira et al. 2015); Faro: Tavira (Vandel 1946). Given the high number of records from Spain, only the provinces are listed: Almería (Vandel 1953; Cifuentes 2021a); Badajoz (Garcia et al. 2021); Barcelona (Arcangeli 1924; Cruz, 1991); Cádiz (Schmölzer 1955a); Castellón (Schmölzer 1971); Ciudad Real (De Buen 1887); Coruña (Dollfus 1892); Cuenca (Pollo Zorita 1986a, 2015); Gerona (Arcangeli 1924; Cruz, 1991); Granada (Dollfus 1892, 1897; Vandel 1953; Schmölzer 1955a; Cifuentes 2021a); Guadalajara (Pollo Zorita 1986a, 2015); Guipúzcoa (Vivar et al. 1984); Huelva (De Buen 1887); Islas Baleares (Vandel 1961; Schmölzer 1971; Bellés et al. 1989; Cruz 1989; Garcia & Cruz 1996; Vadell 2003; Vadell & Zaragoza 2005; Garcia 2008, 2009); Lérida (Arcangeli 1925); Madrid (De Buen 1887; Pollo Zorita 1986a, 2015; Lefebvre & Marcadé 2005; Garcia & Cabanillas 2021); Málaga (Schmölzer 1971; Cifuentes 2021a; Castillo Martínez et al. 2022); Murcia (Garcia 2019; Cifuentes 2021b); Navarra (Fidalgo & Herrera 1980; Cifuentes 1984); Pontevedra (Gregory et al. 2012); Sevilla (Budde-Lund 1885; Dollfus 1892; Schmölzer 1971); Toledo (Pollo Zorita 1986a, 2015); Zaragoza (Dollfus 1897).

In Portugal, it appears to have a limited representation compared with its prevalence in the rest of the Ibero-Balearic region. It is recorded for the first time in the Portuguese districts of Beja, Braga, Coimbra, Guarda, Porto, Viana do Castelo and Vila Real, and the Spanish provinces of Asturias, Ávila and Soria (Fig. 22).