Hypolobocera dentata H. chocoensis H. malagueña, · PDF fileHypolobocera dentata sp....
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Rev. BioI. Trop ., 35(1): 93-95, 1987. Hypolobocera den tata sp . nov . : A new freshwater crab (Crustacea : Brachyura : Pseudothelphusidae) from the Cordillera Occidental, Colombia Henry von Prahl Departamento de Biología. Universidad del Valle. Cali-Colombia. (Received September 1 2, 1986) Abstract: A new species of Pseudothelphusidae is described from the Cordillera Occidental of Colombia. Hypolobocera dentata sp. nov. adds a fourth species to group IV. lts gonopod resembles that of H. chocoensis and H. malaeña, but differs in the presence of spines on the flange of the apical border of the gonopod and by the presence of tubercles on the surface and border of the lateral lobe. In his revision of the freshwater crabs of America (Pseudothe1phusidae), Rodríguez (1982) proposed six groups for the crabs of the genus Hypolobocera. In group IV he p1aced H chocoensis Rodríguez, 1980, from Condoto ant the river Tamaná, Chocó, Colombia, and H smalleyi Pretzmann, 1968, from Cana, Pa- namá. Recent1y von Prahl (1986) described H malaeña from Quebrada Alegría, Málaga Bay, Colombia and p1aced it in group IV. The examination of new material collected on the Pacific drainage of the Cordillera Occi- dental of Colombia permitted us to add a fourth species to group IV. The new species is described here. The material is deposited in the reference collection of Marine Bio10gy, Universidad del Valle, Cali, Colombia (CRBMUV). RESULTS Hypolobocera dentata sp. nov. Material examined. Id , 19 , Finca "El Manzano" near Betania, municipio de Bolívar, on the Pacific drainage of the Cordillera Occi- dental, Departamento of Valle, Colombia (28 January 1 984), 1 ,600 m. Coll. Eduardo Ve1asco. Holotype. d , No. 071 ADT-CRBMUV, 24.0 mm carapace breadth, 1 5 .6 mm carapace 1ength, gonopod 6.2 mm. 93 Allotype. 9 , No. 072 ADT-CRBMUV, 25.7 mm carapace breadth, 17.0 mm carapace 1ength. ription. Frontal groove shallow, front convex, covered with well visible tubercles. Postfrontal 10bes ill defmed. Ceical oove straight, shalow, deeper in its posterior half, and do es not reach the antero rolateral border. Atero1ateral margin with a doub1e row f spiny tuberc1es that ends in papillae near the orbits; the rest of the border is tuberculated (Fig. 1 A). The opening of the brcal channe1 is wide (Fig. lB). In caudal view, the gonopod is characterized by a prominent subtriangu1ar lateral lobe, with tuberc1es on the dorsal border (Fig. 1 C) and a field of tubercles on the mesial surface of the lateral 10be (Fig. ID). The gonopod has a strong medial constriction and a lateral crest in S formo The apical surface of the gonopod (mesial) has five well visible spines on the lateral flange (Fig. lE). Color. Carapace brown with yellow spots on the posterior regíon. Remarks. Hypolobocera den tata sp. nov. has the typica1 characteristics of oup IV, which are the presence of a prominent subtriangular lateral lobe and a strong medial cónstriction of the gonopod and the presence of a lateral crest in S formo The rounded apical surface (distal
Transcript of Hypolobocera dentata H. chocoensis H. malagueña, · PDF fileHypolobocera dentata sp....
Rev. BioI. Trop., 3 5 ( 1 ) : 93-95, 1 987 .
Hypolobocera den tata sp . nov . : A new freshwater crab (Crustacea : Brachyura : Pseudothelphusidae)
from the Cordillera Occidental, Colombia
Henry von Prahl Departamento de Biología. Universidad del Valle. Cali-Colombia.
(Received September 1 2, 1 986)
Abstract: A new species of Pseudothelphusidae is described from the Cordillera Occidental of Colombia. Hypolobocera dentata sp. nov. adds a fourth species to group IV. lts gonopod resembles that of H. chocoensis and H. malagueña, but differs in the presence of spines on the flange of the apical border of the gonopod and by the presence of tubercles on the surface and border of the lateral lo be.
In his revision of the freshwater crabs of America (Pseudothe1phusidae) , Rodríguez ( 1982) proposed six groups for the crabs of the genus Hypolobocera. In group IV he p1aced H. chocoensis Rodríguez , 1 980, from Condoto ant the river Tamaná, Chocó, Colombia, and H. smalleyi Pretzmann, 1 968, from Cana, Panamá. Recent1y von Prahl ( 1 986) described H. malagueña from Quebrada Alegría, Málaga Bay, Colombia and p1aced it in group IV.
The examination of new material collected on the Pacific drainage of the Cordillera Occidental of Colombia permitted us to add a fourth species to group IV. The new species is described here.
The material is deposited in the reference collection of Marine Bio10gy, Universidad del Valle, Cali, Colombia (CRBMUV).
RESULTS
Hypolobocera dentata sp. nov.
Material examined. I d , 1 9 , Finca "El Manzano" near Betania, municipio de Bolívar, on the Pacific drainage of the Cordillera Occidental, Departamento of Valle, Colombia (28 January 1 984), 1 ,600 m. Coll. Eduardo Ve1asco.
Holotype. d , No. 07 1 ADT-CRBMUV, 24.0 mm carapace breadth, 1 5 .6 mm carapace 1ength, gonopod 6.2 mm.
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Allotype. 9 , No. 072 ADT-CRBMUV, 25.7 mm carapace breadth, 1 7 .0 mm carapace 1ength.
Description. Frontal gro ove shallow, front convex, covered with well visible tubercles. Postfrontal 10bes ill defmed. Cervical groove straight, shalow, deeper in its posterior half, and do es not reach the antero rolateral border. A tero1ateral margin with a doub1e row Cbf spiny tuberc1es that ends in papillae near the orbits; the rest of the border is tuberculated (Fig. 1 A). The opening of the branchial channe1 is wide (Fig. l B). In caudal view, the gonopod is characterized by a prominent subtriangu1ar lateral lobe, with tuberc1es on the dorsal border (Fig. 1 C) and a field of tubercles on the mesial surface of the lateral 10be (Fig. I D). The gonopod has a strong medial constriction and a lateral crest in S formo The apical surface of the gonopod (mesial) has five well visible spines on the lateral flange (Fig. l E).
Color. Carapace brown with yellow spots on the posterior regíon.
Remarks. Hypolobocera dentata sp. nov. has the typica1 characteristics of group IV, which are the presence of a prominent subtriangular lateral lobe and a strong medial cónstriction of the gonopod and the presence of a lateral crest in S formo The rounded apical surface (distal
94 REVISTA DE BIOLOGIA TROPICAL
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::::::��, " � B �;. Fig. 1 . A. Carapace of Hypolobocera dentata sp. nov. , B. branchial opening, C. caudal view of the gonopod, D. cephalic view of the gonopod, E. apical (distal) view of the gonopod of Hypolobocera dentata sp. nov.
rig. 2. Right gonopod of Hypolobocera chocoensis Rodríguez. A. caudal vie\\', B. cephalic view, C. apical view. region) has a projection of the mesial border that partially covers the field of spines and ends in a sma11 spine.
Fig. 3 . Right gonopod of Hypolobocera malagueña von PrahI. A. caudal view, B. cephalic view, C. apical view.
Diagnosis. H. dentata sp. nov. differs from H. chocoensis (Fig. 2 A, B, C) and H. malagueña (Fig. 3 A, B, C) by the presence of tuberc1es
PRAHL: Hypolobocera dentata : A new freshwater crab 95
on the dorsal border and the mesial surface of the lateral lobe. The most important difference is that H. dentata sp. nov. has five well developed spines on the lateral flange of the apical surface of the gonopod, a characteristic not shared with other species of group IV.
RESUMEN
Se describe una nueva especie de cangrejo de agua dulce (Pseudothelphusidae) de la Cordillera Occidental de Colombia, agregando una cuarta especie al grupo IV. La nueva especie se dife-
rencia de las especies conocidas más próximas, H. chocoensis y H. malagueña, por la presencia de espinas laterales sobre el borde apical interno del gonopodo, lo mismo que tubérculos sobre la región dorsal y mesial del lóbulo lateral.
REFERENCES
Prahl, H. von. 1 986. Freshwater crabs (Crustacea, Brachyura, Pseudotelphusidae) of the Pacific Coast of Colombia. 2001. 1. Syst. (in press).
Rodríguez, G. 1 982. Les crabes d'eau douce d' Amérique (famille des Psudothelphusidae). Fauna Tropicale XXII, Orstom, 223 pp.
