Palaemon carteri (Gordon, 1935)

Carvalho, Fabricio Lopes, Magalhaes, Celio & Mantelatto, Fernando Luis, 2014, Molecular and morphological differentiation between two Miocene-divergent lineages of Amazonian shrimps, with the description of a new species (Decapoda, Palaemonidae, Palaemon), ZooKeys 457, pp. 79-108 : 86

Taxon classification Animalia Decapoda Palaemonidae

Palaemon carteri (Gordon, 1935) Figures 5aand 6a

Palaemonetes carteri Gordon, 1935: 324, fig. 12;- Holthuis 1948: 113;- Holthuis 1950b: 32;- Holthuis 1966: 6 [part, spec. from Rio Tapajós];– Rodríguez 1980: 126;- Rodríguez 1981: 47 [in list];- Rodríguez 1982: 390;- Coelho and Ramos-Porto 1985: 408 [in table];- Holthuis 1993: 8;- Delgado et al. 1997: 16 [in list];- Ramos-Porto and Coelho 1998: 337 [in list];- Barros and Pimentel 2001: 20 [in list];- Vieira 2003: 61;- Magalhães and Pereira 2007: 9, 10, 12 [in list]; Mora-Day et al. 2009: 196 [in list];- Pereira et al. 2010a: 606 [in list];- Pereira et al. 2010b: 84 [in list];- Pileggi et al. 2013: 569 [part, material from Amapá and Bragança;? material from rio Tapajós basin].

Palaemonetes (Palaemonetes) carteri - Holthuis 1950c: 10 [in list];- Holthuis 1952: 218, pl. 52, figs c-o, pl. 53, figs a–c;– Holthuis 1959: 81, text-fig. 9;- Kensley and Walker 1982: 11 [part,? spec. from Rio Curua Una];- López and Pereira 1996: 54, fig. 8;- López and Pereira 1998: 77 [in list]; Melo 2003: 382 [part, not Amazonas].

Holotype.

Guyana, upper Cuyuni River, ♂, col. GS Carter (NHM 1935.5.20.19).

Paratypes.

Karow Creek, 2 m NE of Penal Settlement, Mazaruni, 1 ♂; River Cuyuni, 1♀ov; Forest Swamp, upper Cuyuni, 1♂; same data as holotype, 7♂ 3♀ 1♀ov 1 juvenile (NHM 1935.5.20.20-29).

Other material.

Suriname.Nickerie. Lower Naui Kreek, Southern Niew, 10♂ 10♀, col. DC Geijskes, 18 March 1971 (INPA 176). Brazil. Amapá. Floresta Nacional do Amapá, igarapé Japim, 5♂ 5♀, col. CRM Santos and JEM Nanzelor, 27 October 2009 (MPEG 1108); Porto Grande, Floresta Nacional do Amapá, tributary of rio Araguari, 1♂ 4♀, col. CRM Santos, 28 October 2009 (CCDB 2755); Macapá, stream in the home of Sr. Marcondes, 1♂ 4♀ov, col. J Cunha, 6 March 2005 (MZUSP 17676). Pará. Barcarena, Vila do Conde, 5♂ 2♀ 3♀ov, col. B Mascarenhas, 23 March 2002 (MPEG 739); Belém, Mocambo, 5♂ 5♀ov, col. FR Pimentel and R Maia, January 9 1998 (MPEG 528); Belém, Mocambo, Reserva Mocambo, 4♂ 6♀, col. FR Pimentel and J Dias, 18 June 1999 (MPEG 628); Bragança, Jequeri, Sítio Anacuã, 7♂ 9♀, 23 October 2002 (MPEG 787); Ilha do Marajó, cachoeira do Arari, 1♀, col. J Cunha and J Zuanon, 16 May 2008 (MZUSP 22753); Castanhal, 1♀ov, col. FL Carvalho et al., 14 December 2012 (CCDB 4338); Ilha de Marajó, cachoeira do Arari, rio Arari, igarapé Popudas, 1♂ 1♀, col. J Cunha and J Zuanon, 17 May 2006 (MZUSP 23224); Laranjal do Jari, igarapé Arapiranga, 2♀ 1♀ov, col. Moreira et al., 25 March 2008 (MZUSP 23225); Melgaço, Floresta Nacional de Caxiuanã, 5♂ 4♀, 8 November 1999 (MPEG 717); Santa Maria do Pará, 3 juveniles, col. FL Carvalho et al., 15 December 2012 (CCDB 4339); Tucuruí, rio Tocantins basin, igarapé Santos, 2♀, col. W Zuink and LCF Alvarenga, 16 September 1984 (MNRJ 23382).

Diagnosis.

Mandibular palp absent. Rostrum slender, curved upward, reaching or just overreaching the tip of the scaphocerite; dorsal margin with 6 to 10 teeth; ventral margin with 3 to 7 teeth, usually 4 or more. Projection of the anterolateral margin of the first antennular segment overreaching the middle of the second segment, but not reaching, sometimes almost reaching, the dorsal distal margin of the second segment; anterolateral spine of the first antennular segment usually reaches the middle of the projection of the anterolateral margin. Appendix masculina up to 1.1 the length of the appendix interna, measured from their junction. Telson carrying 2 plumose setae between the inner distal stout setae; inner distal stout setae overreaching the distal tip of the telson.

Geographic distribution.

Venezuela (Amazonas, Bolívar, Delta Amacuro, Monagas), Guyana, Suriname, French Guiana, Brazil (eastern Amazon: Amapá, Pará).

Ecological features.

Usually associated with riparian vegetation, leaf litter and similar microhabitats in lakes, streams and rivers, in areas with low flow. At least in the Amazon river basin, its occurrence is usually associated to clear water river systems.