Peramphithoe femorata ( Krøyer, 1845 )

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 : 1802-1803

Peramphithoe femorata ( Krøyer, 1845)

Amphithoe femorata Krøyer, 1845: 335 , pl. 3, fig. 4.

Ampithoe femorata: Kreibhom de Paternoster and Escofet, 1976: 78–83 , pls. 1–3; Alonso, 1980: 4–5, pl. 1.

Peramphithoe femorata: Conlan and Bousfield, 1982: 68–69 , fig. 16; De Broyer et al., 2007: 240.

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, 19 March 1999: 1 ♀ 7.5 mm, 1 sex indet. 5 mm, MACN-In 38409a; 2 ♂♂ 8 and 11 mm, MACN-In 38409b; 2 ♀♀ 11 and 11.6 mm, 1 sex indet. 4.7 mm, MACN-In 38409c; 6 ovig. ♀♀ 16–20 mm, MACN-In 38409d12; 10 ♂♂ 12–17 mm, MACN-In 38409e; 8 ovig. ♀♀ 16–22 mm, MACN-In 38409f; 3 ♂♂ 12.3–20 mm, MACN-In 38409g; 6 ovig. ♀♀ 16–20 mm, 3 ♀♀ 11–13 mm, MACN-In 38409h; 10 ♂♂ 12.3–19 mm, MACN-In 38409i. Same location, same colls., 24 May 1999: 1 ovig. ♀ 15 mm, MACN-In 38410a; 1 ♀ 7.8 mm, MACN- In 38410b; 1 ovig. ♀ 14.2 mm, MACN-In 38410c. Same location, same colls., 27 May 1999: 2 ovig. ♀♀ 19 mm, 1 ♀ 15 mm, 1 sex indet. 3.7 mm, MACN-In 38411a; 1 ♂ 9.1 mm, MACN-In 38411b; 3 ovig. ♀♀ 16–19 mm, 2 ♀♀ 12 and 13.4 mm, MACN-In 38411c; 5 ♂♂ 13.5–19.3 mm, MACN-In 38411d; 1 ovig. ♀ 19.2 mm, 3 ♀♀ 14–18 mm, MACN-In 38411e; 2 ♂♂ 18 mm, MACN-In 38411f; 3 ovig. ♀♀ 17–18 mm, 1 ♀ 13.8 mm, MACN-In 38411g; 2 ♂♂ 17 and 19 mm, MACN-In 38411h. Same location, same colls., 5 August 1999: 1 ovig. ♀ 20.3 mm, 1 ♀ 10 mm, MACN-In 38412a; 1 ♂ 19 mm, MACN-In 38412b; 3 ♀♀ 18.5–21 mm, MACN-In 38412c; 1 ♂ 17 mm, MACN-In 38412d; 1 ovig. ♀ 18.5 mm, MACN-In 38412e. Same location, same colls., 11 August 1999: 1 ovig. ♀ 18 mm, 2 ♀♀ 20 and 21 mm, MACN-In 38413a; 3 ♂♂ 15–17 mm, MACN-In 38413b. Same location, same colls., 1 November 1999: 2 ovig. ♀♀ 16.8 and 21 mm, MACN-In 38414a; 3 ovig. ♀♀ 17–21 mm, 6 ♀♀ 8–13 mm, MACN- In 38414b; 5 ♂♂ 10–18 mm, MACN-In 38414c; 5 ovig. ♀♀ 17–21 mm, 5 ♀♀ 8–18 mm, MACN-In 38414d; 7 ♂♂ 12.1–18 mm, MACN-In 38414e. Same location, same colls., 10 November 1999: 2 ♀♀ 8 and 13 mm, MACN-In 38415a; 2 ♂♂ 15 and 17 mm, MACN-In 38415b. Same location, same colls., 10 February 2000: 1 ovig. ♀ 15 mm, 1 ♀ 11 mm, MACN-In 38416a; 1 ♂ 13 mm, MACN-In 38416b; 5 ovig. ♀♀ 16–18 mm, MACN-In 38416c; 1 ♂ 20 mm, MACN-In 38416d; 4 ovig. ♀♀ 15–17 mm, MACN-In 38416e; 4 ♂♂ 11–16 mm, MACN-In 38416f; 1 ♀ 16 mm, MACN-In 38416g; 3 ovig. ♀♀ 15–17 mm, MACN-In 38416h; 2 ♂♂ 18 and 19 mm, MACN-In 38416i. Same location, same colls., 14 February 2000: 1 ovig. ♀ 19.3 mm, MACN-In 38417a; 1 ♀ 9 mm, MACN-In 38417b; 1 ♂ 14 mm, MACN-In 38417c; 1 ovig. ♀ 19 mm, MACN-In 38417d; 1 ♂ 19 mm, MACN-In 38417e. Same location, same colls., 2 May 2000: 1 ♂ (damaged), MACN-In 38418a; 2 ♀♀ 8.8 and 9.8 mm, 1 sex indet. 4.4 mm, MACN-In 38418b; 1 ovig. ♀ 17 mm, MACN-In 38418c; 1 ♀ 8.25 mm, MACN-In 38418d; 1 ♂ 19.3 mm, MACN-In 38418e; 1 ovig. ♀ 19 mm, 1 sex indet. 5.5 mm, MACN-In 38418f; 2 ♂♂ 14 and 19 mm, MACN-In 38418g. Same location, same colls., 29 May 2000: 1 ovig. ♀ 17 mm, 1 ♀ 14 mm, 2 sex indet. 8 mm, MACN-In 38419a; 1 ♀ 7.3 mm, 1 sex indet. 5 mm, MACN-In 38419b; 1 ♀ 9 mm, 2 sex indet. 7.5 and 8 mm, MACN-In 38419c. Santa Cruz province; Ría Deseado, 47 ◦ 45 ′ S, 65 ◦ 55 ′ W: Baliza Sorrel, 1 ovig. ♀ 17.2 mm, washed algae, subtidal, 4 May 1973, MACN-In 38420a, 5 ♂♂ 14–19 mm, same data, MACN-In 38420b; associated with M. pyrifera , subtidal, coll. J. López Gappa: Punta Cascajo, 1 ovig. ♀ 16 mm, 1 ♀ 12 mm, January 1980, MACN-In 38421; Baliza Sorrel, 1 ♀ 12 mm, 1 ♂ 14 mm, February 1980, MACN-In 38422; Península Foca, 11 February 1980: 1 ovig. ♀ 16 mm, 2 ♀♀ 15 and 17 mm, MACN-In 38423a; 1 ♂ 12 mm, same data, MACN-In 38423b; Península Foca, 1 ♀ 14 mm, January 1981, MACN-In 38424; between Isla Quinta and the coast, 1 ♂ 13 mm, February 1981, MACN-In 38425 .

New catalogue numbers

Argentina; Santa Cruz province, Ría Deseado, approx. 47 ◦ 45 ′ S, 65 ◦ 55 ′ W, Península Foca : 3 ovig. ♀♀ 16.2–18 mm, 1 ♂ 10.8 mm, 1977, MACN-In 38426 ; Isla Larga : 8 ♀♀ 8–12.5 mm, 3 ♂♂ 10.3–12.2 mm, 30 March 1978, MACN-In 38427; Península Foca: 2 ♀♀ 7.8 and 11 mm, 27 April 1978, MACN-In 38428 ; Isla Larga : 1 ♂ 14 mm, 20 July 1978, MACN-In 38429; Punta Cascajo: 1 sex indet. 6.7 mm, 23 April 1979, MACN-In 38430 .

Remarks

Peramphithoe femorata is widely distributed in the Magellanic area. Kreibhom de Paternoster and Escofet (1976) and Alonso (1980) found this species associated with M. pyrifera in Chubut and Santa Cruz provinces, respectively. The present records enlarge its distribution in Santa Cruz and southern Tierra del Fuego.