Hypocaccus (Baeckmanniolus) dimidiatus dimidiatus (Illiger)

Penati, Fabio, 2009, An updated catalogue of the Histeridae (Coleoptera) of Sardinia, with faunistic, zoogeographical, ecological and conservation remarks *, Zootaxa 2318, pp. 197-280 : 252-253

72. Hypocaccus (Baeckmanniolus) dimidiatus dimidiatus (Illiger)

Saprinus dimidiatus Illig. : Bargagli 1871: 42; Bertolini 1904: 49

Saprinus maritimus: Champion 1911: 222

Saprinus (Hypocaccus) dimidiatus Illig. : Porta 1926: 380

Pachylopus dimidiatus Ill. : Luigioni 1929: 363; Barajon 1966

Baeckmanniolus dimidiatus (Illig.) : Vienna 1971: 281

Literature data. “Sardinia” ( Bargagli 1871; Bertolini 1904; Porta 1926; Luigioni 1929; Barajon 1966; Vienna 1980; Audisio et al. 1995; Yélamos & Lackner 2004). “Sardegna sud-orientale” [= south-east Sardinia], VI .1971 , EB, 2 ex ( Vienna & Ratti 1999). Cagliari prov. : Cagliari, VI .1937 , 1 ex ( Vienna 1971); idem, 21.V .1955 , LC, 10 ex (7 MSNM, 3 CGMü); idem, loc. Poetto , 21.V .1955 , GMi, 3 ex (MSNM). Capoterra , foce del rio Santa Lucia, 4.VI.1981, among grass on sandy banks, CM, 1 ex (CCMe). Castiadas, Costa Rey, 6.VII.1980, on dog carcass, CM , 3 ex (CCMe); idem , 26.V .1988 , GBe, 7 ex (CRPa); idem, VII.1988, VB, 1 ex ( CPC); idem , 26.VII.1990, DS, 1 ex ( CEM); idem, stagno Salina , 2–15.VIII.1980, on dead fish, CM , 4 ex (CCMe). Domus de Maria , loc. Chia, 1 ex ( CPE); idem, Porto di Piscinnì , 3.IV.1986, at the base of Eryngium maritimum, CM , 1 ex (CCMe); idem, stagno s’Acqua Dulci , 9.IV.1991, under shelter on beach, CM , 1 ex (CCMe). Giorgino, 25.V.1973, at the base of psammophilous plants, CM, 3 ex (CCMe); idem , 10.VI.1973, with bait, CM, 2 ex ( MSNTO ex-coll. P. Vienna ); idem , 23.VI.1978, at the base of psammophilous plants, CM, 1 ex (CCMe); idem , 17.X.1979 ( MSNM); idem, loc. La Plaja , 26.VI.1975, attracted to white sheet, CM, 3 ex (CCMe); idem , 24.VI.1977, on dead rat, CM, 2 ex (CCMe). Gonnesa, loc. Fontanamare, 4.IV.1991, on dead gull, CM , 25 ex (CCMe); idem , 15.V .1995 , FA, 2 ex (CFA). Iglesias , dint. Masua, 12.V .1992 , C/N, 1 ex (MZUF). Isola di San Pietro , Cala Spalmatore, 12.VI .1989 , NS, 3 ex (MSNG); idem, La Caletta , 17.V .1971 , LB, 8 ex ( Vienna & Ratti 1999; 5 MSNV, 3 CPV). Isola di Sant’Antioco , Sant’Antioco, 17.V .1971 , LB, 1 ex (CPV). Muravera , foce del rio sa Picocca (CCMe). Nebida, 9.IV.1912, AD, 18 ex ( CAD). Sant’Antonio di Santadi , 29.IV.1990, CM , 25 ex (CCMe). Solanas, 19.VI .2000 (CPV). Villaputzu , Porto Corallo, foce del Flumendosa, 25.X.1977 ( MSNM); idem , 4.VII.1989, under fresh algae in backdune freshwater pool, CM , 5 ex (CCMe). Nuoro prov. : Cala Gonone, towards north, loc. Cala Cartoe, 1981 (CRPe). Capo Comino , 18–30.VII.1987, ER, 20 ex ( Vienna & Ratti 1999). Santa Lucia , beach , 8.VI.1996, LS, 21 ex ( CLS). Siniscola , VII.1974, GF, 2 ex ( MSNG). Supramonte , 12.VIII.1994, AS, 6 ex ( MZUF). Oristano prov. : Cabras, dint ., 24.IX.1972, NS, 1 ex ( MSNG). Oristano , foce del Tirso , 26.V .1991 , at base of Eryngium maritimum, CM , 1 ex (CCMe). San Giovanni di Sinis , 7.V .1986 , DB, 1 ex (CDB). Su Pallosu , beach, 30.X.1977 ( MSNM). Tharros , 19.III.2001, ADg, 1 ex ( CFP). Sassari prov. : Alghero , VII.1973, LB, 2 ex ( Vienna & Ratti 1999); idem , 22.V .1994 , DS, 1 ex (CEM); idem, south of city towards Monte Mannu , 29.V .1974 , PV, 2 ex (CPV); idem, dint., 14.V .1971 , LB, 1 ex (CPV); idem, Le Bombarde , VII.1973, LB, 2 ex ( Vienna & Ratti 1999); idem, Porto Ferro , VII.1973, LB, 4 ex ( Vienna & Ratti 1999); idem , 23.VII.1973, 1 ex ( Vienna & Ratti 1999); idem, port beach , 23.V .1974 , MF, 1 ex (CMF). Golfo Aranci , sd, AD, 1 ex ( CAD); idem, 13–19.VI .1910 , “sandy beaches”, GCh, ex pl. ( Champion 1911); idem, Golfo di Marinella , 13–19.VI.1910, “sandy beaches”, GCh, ex pl. ( Champion 1911). Isola Rossa, beach, 6.IX.1993, CV , 3 ex ( CFP). Isola Santa Maria , Cala Santa Maria , 26.IX.1985, reed bed, RP, 1 ex ( MSNG). Isola Tavolara , Spalmatore di Terra , 8.IV.1986, RP, 4 ex ( MSNG); idem, unspecified locality , 8.IV.1986, MB , 1 ex ( MSNG). La Nurra , Torre del Porticciolo , 28.VI –1.VII.1999 , PC/GS, 1 ex (CPC). Santa Teresa Gallura , baia [= bay] Santa Reparata, 3.V .1984 , at base of Eryngium maritimum, CM , 1 ex (CCMe). Sassari, sd, UL, 1 ex ( CUL); idem, loc. Platamona, beach, V .1974, VR, 16 ex ( PIME); idem, stagno di Platamona , 19.V.1974, VR, 21 ex (CFP).

Unpublished records. “Sardinia”, sd, 4 ex (CFB as Saprinus dimidiatus Ill. ). Cagliari prov.: Arbus, Piscinas di Ingortosus, 5.III.2001, RL, 20 ex (CPM); idem, 26.III.2006, at sight, DW, 1 ex ( CNBFVR) . Buggerru, 15 km NW of Iglesias , 3. V.1976, SZ, 25 ex (CGRa) . Gonnesa, loc. Fontanamare, IV.1989, DS, 1 ex ( CDS) . Isola di San Pietro, Punta Nera, 20. V.1971, LB, 1 ex ( CPV) . Isola di Sant’Antioco, loc. Is Pruinis, beach, 2.VIII.1998, on cow dung, CM, 2 ex (CCMe) . Nuoro prov. : Aritzo, loc. su Pranu, 26.VIII.1967, 1 ex ( DPPS) . Bosa, Bosa Marina, 18. VI.1998, TL, 19 ex ( CPM) ; idem, 5.VII.2002, PG, 3 ex ( MSNG) . Gairo, Marina di Gairo , 10–17. V.1980, AT, 1 ex (CGRa) . Orosei, 15.VIII.1970, 1 ex ( DPPS) . Siniscola, Capo Comino, 30.VII.1968, 1 ex ( DPPS) ; idem, beach, 3–5.VII.2000, PC/GS, 3 ex ( CPC) ; idem, 7–10.VII.2000, PC/GS, 8 ex ( CPC) ; idem, 12.VII.2000, PC/GS, 2 ex ( CPC) ; idem, VII.2001, PC, 3 ex ( CPC) ; idem, beach to the north, 16. VI.2003, GL ( MSNG) ; idem, beach, 14–19. VI.2007, at sight, PC, 3 ex ( CPC) ; idem, 20–29. VI.2007, PC, 1 ex ( CPC) . Oristano prov. : San Giovanni di Sinis, 1.VII.2002, PG, 2 ex ( MSNG) . Sassari prov. : Alghero, 16.IV.1902, AD, 1 ex ( CAD) ; idem, Porto Ferro, 17. VI.1966, 1 ex ( DPPS) ; idem, 10. VI.1971, 1 ex ( DPPS) . Golfo Aranci, VII.1910, AD, 1 ex ( CAD) ; idem, Lido Pittulongu, 22. V.1976, under dead gull, RP, 28 ex ( CRP) . Isola Asinara, Cala Arena, 2003–2004 [various dates], M/S, pitfall trap, ex. pl. ( ISE-SS) ; idem, Cala Sabina, 2004 [various dates], M/S, pitfall trap, ex. pl. ( ISE-SS) ; idem, Cala Sant’Andrea, 2003–2004 [various dates], M/S, pitfall trap, ex. pl. ( ISE-SS) . Porto Torres, 28.VIII.1956, 1 ex ( DPPS) . Sassari, loc. Platamona, beach, 17. V.1974, MF, 2 ex ( CMF) . Stintino, Cala Scoglietti, 18.VIII.2004, DS, 1 ex ( CDS) .

Chorotype. 3.01 MED (Mediterranean).

Italian distribution. Piedmont, Venetia, Friuli-Venezia Giulia, Liguria, Emilia-Romagna, Tuscany, Marches, Latium, Campania, Abruzzi, Apulia, Basilicata, Calabria, Sicily and Sardinia.

Ecology. A halophilous psammobiont associated with sandy coastal habitats, where it lives on carcasses, in excrements and under stranded vegetable matter; in late autumn it can be found by sieving sand at the base of halophilous plants.

Notes. In Penati and Vienna (2005, 2006a) the data referring to the specimen from Sassari (CUL) are erroneously given as “Alghero, 1940, coll. Museo Genova” (see “Data collection”).