Tanarctus gracilis n. sp. (Renaud-Mornant 1980)
Terra typica: Atlantic Ocean (USA, North America)
Adriatic Sea:
• 40 ° 43.09 ′N, 17 ° 48.64 ′E ; 20 m bsl: [FAO 37] Italy, Brindisi Province, Torre Guaceto, coarse sand. Accogli et al. (2011)
• 40 ° 34.38 ′N, 18 ° 0 9.49 ′E ; 10 m bsl: [FAO 37] Italy, Brindisi Province, Mattarelle [Torre Mattarelle], ENEL power station, coarse sand. Accogli et al. (2011)
• 40 ° 27.24 ′N, 18 ° 14.63 ′E ; 10 m bsl: [FAO 37] Italy, Lecce Province, Lecce Bacino (San Cataldo), coarse sand. Accogli et al. (2011)
• 40 ° 27.24 ′N, 18 ° 14.63 ′E [40 ° 22 ′N, 18 ° 20 ′E]; 10 m bsl: [FAO 37] Italy, Lecce Province, Ceisne (Marne protected area), coarse sand. Accogli et al. (2011)
• 40 ° 27.17 ′N, 18 ° 14.58 ′E [40 ° 22 ′N, 18 ° 20 ′E]; 10 m bsl: [FAO 37] Italy, Lecce Province, Ceisne (Marne protected area), coarse sand. Accogli et al. (2011)
Atlantic Ocean:
• 61 ° 17 ′ 42 ′′N, 08° 32 ′ 18 ′′W; 104–260 m bsl: [FAO 27] Faroe Islands, Faroe Bank, shell gravel, coarse shell gravel, fine carbonate sand, carbonate sand, or fine shell sand. Hansen et al. (2001)
• 34 °07.3′N, 75 ° 57 ′W / 34 °07′N, 75 ° 57 ′W; 400 m bsl: [FAO 31] Type locality: USA, North Carolina State, bathyal or abyssal depth, 6 cm deep in sand, fine sand with 17 % clay. Renaud-Mornant (1980)
Balearic Sea:
• 40 ° 49 ′N, 08° 30 ′E; 0 m bsl: [FAO 37] Italy, Sardinia, Sassari Province, Gulf of Asinara, medium and medium fine sand. D’Addabbo Gallo et al. (2007)
Indian Ocean:
• 04° 15 ′N, 72 ° 49 ′E; 19 m bsl: [FAO 51] Republic of the Maldives, Ari Nord Atoll, coarse sand. Gallo et al. (2007)
• 03° 29 ′N, 72 ° 47 ′E; 22–23 m bsl: [FAO 51] Republic of the Maldives, Ari Sud Atoll, coarse sand. Gallo et al. (2007)
• 11 ° 32 ′,00S, 47 ° 23 ′,02E [11 ° 34 ′S, 47 ° 24 ′E]; 615–625 m bsl: [FAO 51] Comoros Archipelago, Mozambique Channel, coralline sand. Renaud-Mornant (1984 a)
Ionian Sea:
• 40 ° 15.40 ′N, 17 ° 52.57 ′E; 10 m bsl: [FAO 37] Italy, Lecce Province, Porto Cesareo (marine protected area), coarse sand. Accogli et al. (2011)
• 40 ° 13 ′ 90 ′′N, 17 ° 54 ′ 59 ′′E [ 40 ° 13 ′N, 17 ° 55 ′E]; 0 m bsl: [FAO 37] Italy, Lecce Province, San Isidoro [Sant’Isidoro]. Grimaldi de Zio et al. (2003)
• 40 ° 12.94 ′N, 17 ° 5.07 ′E [40 ° 13 ′N, 17 ° 55 ′E]; 10 m bsl: [FAO 37] Italy, Lecce Province, San Isidoro, coarse sand. Accogli et al. (2011)
• 39 ° 52 ′00′′N, 16 ° 42 ′ 30 ′′E; 20–200 m bsl: [FAO 37] Italy, Cosenza Province, High Ionian Sea offshore, Calabrian Coast, Amendolara Shoal, coralligenous sand, coralligenous sand mixed with debris, coarse medium or fine coralligenous sand (few samples). D’Addabbo Gallo et al. (1987), Grimaldi de Zio & D’Addabbo Gallo (1987), Grimaldi de Zio et al. (2003)
• 39 ° 51.26 ′N, 18 ° 23.55 ′E; 20 m bsl: [FAO 37] Italy, Lecce Province, Gagliano, coarse sand. Accogli et al. (2011)
• 39 ° 51.26 ′N, 18 ° 23.55 ′E; 50 m bsl: [FAO 37] Italy, Lecce Province, Gagliano, fine sand. Accogli et al. (2011)
• 39 ° 58.71 ′N, 18 ° 18.28 ′E [39 ° 49 ′N, 18 ° 18 ′E]; 10 m bsl: [FAO 37] Italy, Lecce Province, San Gregorio, coarse sand. Accogli et al. (2011)
• 39 ° 58.71 ′N, 18 ° 18.28 ′E [39 ° 49 ′N, 18 ° 18 ′E]; 20 m bsl: [FAO 37] Italy, Lecce Province, San Gregorio, sand, coarse organogenous debris. Accogli et al. (2011)
• 39 ° 48 ′ 40 ′′N, 18 ° 40 ′ 38 ′′E [39 ° 49 ′N, 18 ° 19 ′E]; 0 m bsl: [FAO 37] Italy, Lecce Province, San Gregorio. Grimaldi de Zio et al. (2003)
Tyrrhenian Sea:
• 38 ° 36 ′N, 14 ° 55 ′E; 40 m bsl: [FAO 37 [ Italy, Aeolian Islands, Secca del Capo, coralligenous bank, subtidal zone, coarse coralligenous detritus. Grimaldi de Zio & D’Addabbo Gallo (2001)
Record numbers (Sea/Ocean classification): Adriatic Sea: 5, Atlantic Ocean: 2, Balearic Sea: 1, Indian Ocean: 3, Ionian Sea: 9, Tyrrhenian Sea: 1; total: 21.
Record numbers (FAO classification): FAO 27: 1, FAO 31: 12, FAO 37: 5, FAO 51: 3; total: 21.
Remarks: This species was originally described from deep water (more than 400 m bsl), but later reported from intertidal and subtidal zones (less than 40 m bsl) of the Indian Ocean and the Mediterranean basin. In our opinion, these shallow subtidal records require confirmation.