Microphoxus cornutus ( Schellenberg, 1931 )

Alonso, G. M., 2012, Amphipod crustaceans (Corophiidea and Gammaridea) associated with holdfasts of Macrocystis pyrifera from the Beagle Channel (Argentina) and additional records from the Southwestern Atlantic, Journal of Natural History 46 (29 - 30), pp. 1799-1894 : 1884-1885

Microphoxus cornutus ( Schellenberg, 1931)

Metharpinia cornuta Schellenberg, 1931: 68–69 , fig. 35.

Microphoxus cornutus: Alonso de Pina, 2003: 1045–1051 , figs. 10–12; Chiesa et al., 2005: 171, tb. 2; De Broyer et al., 2007: 190, 191; Alonso de Pina et al., 2008: 19, 20.

Material examined

Argentina; Beagle Channel, northern Isla Despard, 54 ◦ 52 ′ S, 68 ◦ 10 ′ W, 8–12 m depth, colls. D. Aureliano and A. Ferlito, don. G. Lovrich: 1 ♀ (with setose oostegites) 4 mm, 14 February 2000, MACN-In 38720. Golfo San José ; Isla de los Pájaros, approx . 42 ◦ 25 ′ S, 64 ◦ 30 ′ W: 5 ovig. ♀♀ 3–3.6 mm, 2 ♀♀ 3 and 3.05 mm, low tide, low mid-littoral, 18 November 1976, don. L. Orensanz , MACN-In 38721; off El Riacho, approx . 42 ◦ 24 ′ S, 64 ◦ 35 ′ W: 5 ♀♀ 4.3–5.15 mm, mid-littoral, December 2005, coll. and don. L. Orensanz , MACN-In 38722. Chubut province; San Román , 42 ◦ 14 ′ S, 64 ◦ 13 ′ W: 3 ♀♀ 3–3.3 mm, sandy beach, 17 November 1975, coll. and don. L. Orensanz, MACN- In 38723. SAO I survey; sandy bottom, 1971, don. L. Orensanz, sta 26, 41 ◦ 05 ′ 30" S, 65 ◦ 08 ′ 30" W: 1 ♀ 3 mm, 1 sex indet. 2.15 mm, 16.5 m depth, MACN-In 38724; sta 52, 41 ◦ 05 ′ 30" S, 65 ◦ 07 ′ 30 ′′ W: 1 sex indet. 3 mm, 29 m depth, MACN-In 38725; sta 23, 40 ◦ 57 ′ S, 65 ◦ 05 ′ W: 1 ovig. ♀ 2.9 mm, 3 ♀♀ 2.75–3 mm, 1 sex indet. 2 mm, 12.5 m depth, MACN-In 38726. Goyena survey; don. L. Orensanz, sta 7 , 38 ◦ 01 ′ S, 57 ◦ 26 ′ W: 1 ♂ 5.1 mm, 22.5 m depth, 1968, MACN-In 38727; sta 1, 37 ◦ 56.2 ′ S, 57 ◦ 26.4 ′ W: 1 ♀ 6.3 mm, 12.5 m depth, 19 April 1968, MACN-In 38728. Hero survey; sta 16 , 37 ◦ 38 ′ S, 56 ◦ 48 ′ W: 3 ♀♀ 6–7.6 mm, 2 ♂♂ 6 and 7 mm, small dredge, 30 m depth, 26 August 1971, don. L. Orensanz , MACN-In 38729. Buenos Aires province; northern Mar del Plata, approx . 38 ◦ 03 ′ S, 57 ◦ 31 ′ W: 1 ♂ 3 mm, plankton, 20 m depth, October 1968, colls. L. Orensanz and A. Escofet, MACN-In 38730. Survey 9508; off Uruguay, grab type McIntyre, coll. M. Baronna, don. F. Scarabino, sta 36, 36 ◦ 28 ′ S, 54 ◦ 23 ′ W: 1 ♀ 4 mm, 75.5 m depth, 7 October 1995, MNHNM w / o n.; sta 25, 36 ◦ 15 ′ S, 54 ◦ 13 ′ W: 2 ♀♀ 3.7 and 4.2 mm, 65.5 m depth, 26 September 1995, MNHNM w / o n.

Remarks

Microphoxus cornutus ( Schellenberg, 1931) is widely recorded in South America ; it has been reported from Brazil, northern and southern Argentina and southern Chile. Its presence in Uruguay is mentioned for the first time. The species burrows commonly in sediment substrates. Only one specimen associated with M. pyrifera holdfasts was found in the Beagle Channel .