Allacanthos pittieri ( Rathbun, 1898 )

Magalhães, Célio, Wehrtmann, Ingo S., Lara, Luis Rólier & Mantelatto, Fernando L., 2015, Taxonomy of the freshwater crabs of Costa Rica, with a revision of the genus Ptychophallus Smalley, 1964 (Crustacea: Decapoda: Pseudothelphusidae), Zootaxa 3905 (3), pp. 301-344 : 326-328

Allacanthos pittieri ( Rathbun, 1898)

( Figs. 64–68 , 85 )

Pseudothelphusa pittieri Rathbun, 1898: 526 , 535, fig. 17.— Young 1900: 219.— Rathbun 1904: 242 (in list).— Rathbun 1905: 303.— Rathbun 1906: 6 (in list).— Coifmann, 1939: 109.

Pseudothelphusa (Allacanthos) pittieri — Smalley 1964b: 9, figs. 1–3.—Preztmann 1965: 4.

Allacanthos pittieri — Smalley 1970: 105, fig. 4.— Rodriguez 1982: 125.— Villalobos 1982: 220 (in list).— Ng et al. 2008: 173 (in list).— Villalobos Hiriart & Álvarez 2008: 295 (in list).— Lara et al. 2013: 689 (table), 691, fig. 4 (map).

Potamocarcinus (Allacanthos) pittieri — Pretzmann 1971: 20.

Achlidon (Allacanthos) pittieri — Pretzmann 1972: 83, figs. 438–441.

Ptychophallus (Allacanthos) pittieri — Pretzmann 1978: 2.— Pretzmann 1980: 653, pl. 3, figs. 11–15.

Material examined. COSTA RICA. Puntarenas Province, Pacific drainage: 1 male (cw 17.8, cl 11.5), NHMW 4016, San Vito, tributary stream from Aguabuena River, 14.II.1975, I. Poglayen-Neuwall leg.; 2 males, 1 female, UCR-MZ 2662-01, San Vito, 15.vi.1986, A. & G. Smalley, Kerstings & Campo leg.; 2 males, 1 female, INPA 1872, same data; 4 males, INPA 1834, San Vito, 08°47.716'N 82°55.666'W, 10.xi.2009, L.R. Lara leg.; 1 male, UCR-MZ 3218-01, San Vito, creek La Palma, Finca Las Marías, 8°55’18.18”N 82°55’42.42”W, 1007 m, 27.i.2014, I.S. Wehrtmann, C. Magalhães & E. Souza-Carvalho leg.; 3 males, 1 female, 4 young, UCR-MZ 3214-01, San Vito, creek La Palma, finca Las Marias, 8°55’17.17”N 82°55’42.42”W, 1007 m, 27.i.2014, I.S. Wehrtmann, C. Magalhães & E. Souza-Carvalho leg.; 2 males, UCR-MZ 3222-01, Coto Brus, Las Cruces, Culvert stream, 24.vi.2011, leg. unknown; 1 male, INPA 2018, same data; 1 male, syntype, USNM 21243, Agua Buena, 9.iii.1897, H. Pittier leg.

PANAMA. Chiriquí Province, Pacific drainage: 1 male, NHMW 4015, Chiriquí, mouth of stream in the Los Venados creek (tributary of Chiriquí River), SE of Cañas Gordas, 12.ii.1975, I. Poglayen-Neuwall leg.

Description of gonopod. Straight in both caudal, lateral views, with proximal protuberance on lateral side; distal part slightly bent in lateral direction; spermatic channel opening on cephalic side. Marginal suture situated on mesial side, straight in mesial view, row of marginal setae proximally. Proximal portion of mesio-caudal side with short row of setae. Subdistal portion of mesio-cephalic, lateral surfaces with wide subdistal field of minute spines. Marginal process (apical lobe, sensu Smalley, 1964b) simple, narrow, slightly shorter than distal border of apex; distal border slightly convex. Lateral suture incomplete, marked by deep sulcus on the proximal half of the caudal side. Distal portion of mesial border, in mesial view, produced into large, rounded mesial process. Apex with narrow, recurved lateral lobe bearing weakly developed field of apical spines on inner surface.

Syntypes and type locality. Two males and two females (USNM 21243) according to Rathbun (1898). Rodriguez (1982) mentioned two males and one female. The senior author found only one male, cw 18.9, cl 12.1, which is partially dearticulated, carapace damaged and abdomen detached from the body. Costa Rica, Puntarenas Province, Agua Buena (Pacific drainage).

Distribution. Southeastern Costa Rica and western Panama, Pacific drainage ( Fig. 85 ).

Remarks. See Magalhães et al. (2010) for a discussion of the affinities with A. yawi .

Figures

FIGURE 85. Distribution map of Allacanthos pittieri (Rathbun, 1898) and A. yawi Magalhães, Lara & Wehrtmann, 2010.

FIGURES 61 – 70. Ptychophallus uncinatus Campos & Lemaitre, 1999: 61, left first gonopod, holotype, USNM 276164, caudo-mesial view; 62, same data, latero-cephalic view of distal part; 63, left first gonopod, holotype of Ptychophallus barbillaensis Rodríguez & Hedström, 2000, UCR-MZ 2351 - 01, caudo-mesial view. Allacanthos pittieri (Rathbun, 1898): 64, right first gonopod, holotype, USNM 21243, caudo-mesial view; 65, left first gonopod, NHMW 4016, caudo-mesial view; 66, same data, lateral view; 67, same data, cephalic view of distal part; 68, same data, apical-cephalic view of distal part. Allacanthos yawi Magalhães, Lara & Wehrtmann, 2010: 69, left first gonopod, holotype, UCR-MZ 2774 - 01, caudo-mesial view; 70, same data, latero-cephalic view (cl, cephalic lobe; fas, field of apical spines; lb, lateral lobe; mp, marginal process; ss, subdistal field of spines; tl, trianguliform lobe). Scale bars = 1 mm.