Diplocentrus keyserlingii, Karsch, 1880

Santibäñez-López, Carlos E., Francke, Oscar F. & Prendini, Lorenzo, 2013, Systematics of the keyserlingii group of Diplocentrus Peters, 1861 (Scorpiones: Diplocentridae), with descriptions of three new species from Oaxaca, Mexico, American Museum Novitates 2013 (3777), pp. 1-48 : 5-7

Diplocentrus keyserlingii group

Figures 1–19 Diplocentrus keyserlingi group: Hoffmann, 1931: 303, 318. Diplocentrus keyserlingii group: Francke, 1977: 147, 148; 1978: 5, 23, 32, 33, 55; Sissom, 1994: 257–266.

DIAGNOSIS: Species of the keyserlingii group may be distinguished from other species of Diplocentrus by the following characters (fig. 1C–F). The length of the cheliceral movable finger is greater than the length of the manus and the length of the fixed finger is greater than the width of the manus in the keyserlingii group, whereas the length of the movable finger is less than the length of the manus and the length of the fixed finger is less than the width of the manus in other species of Diplocentrus . The height of the pedipalp femur is greater than its width and the dorsal surface of the femur is slightly to markedly convex in the keyserlingii group, whereas the height of the femur is less than its width and the dorsal surface of the femur is flat or shallowly convex in other species of Diplocentrus . The pedipalp chela ventrointernal carina is weakly to moderately developed, and not infuscated in the keyserlingii group, but moderately to strongly developed and densely infuscated in other species of Diplocentrus . The ventral surfaces of the basitarsi of legs III and IV each possess three terminal and one subterminal spiniform macrosetae in the keyserlingii group (fig. 2C), but three terminal, one or two subterminal, and one medial spiniform macrosetae in other species of Diplocentrus (fig. 2A, B).

INCLUDED SPECIES: Ten species are included in the keyserlingii group as defined above: Diplocentrus coylei Fritts and Sissom, 1996 ; Diplocentrus formosus Armas and Martín-Frías, 2003 ; Diplocentrus hoffmanni Francke, 1977 ; Diplocentrus keyserlingii Karsch, 1880 ; Diplocentrus kraepelini , n. sp.; Diplocentrus mitlae Francke, 1977 ; Diplocentrus rectimanus Pocock, 1898 ; Diplocentrus sagittipalpus , n. sp.; Diplocentrus sissomi , n. sp.; Diplocentrus tenango Santibáñez- López and Francke, 2008.

DISTRIBUTION: Species of the keyserlingii group are recorded from four states of central Mexico: Estado de México, Guerrero, Morelos, and Oaxaca (fig. 3) .

Figures

FIGURE 1. Diplocentrus keyserlingii group, microhabitat and representative species. A. Diplocentrus hoffmanni Francke, 1977, burrow entrance. B. Diplocentrus sissomi, n. sp., female with brood in burrow under stone. C. D. hoffmanni, ♂. D. Diplocentrus mitlae Francke, 1977, ♂. E. Diplocentrus rectimanus Pocock, 1898, ♂. F. D. sissomi, n. sp., ♀.

FIGURE 2. Number and distribution of spiniform macrosetae on ventral surface of basitarsi of third and fourth legs in Diplocentrus mexicanus group (A, B) and Diplocentrus keyserlingii group (C). A. Three terminal, one subterminal and one medial spiniform macrosetae. B. Three terminal, two subterminal and one medial spiniform macrosetae. C. Three terminal and one subterminal spiniform macrosetae.

FIGURE 3. Diplocentrus keyserlingii group, known records in central Mexico. A. Diplocentrus coylei Fritts and Sissom, 1996 (circles); Diplocentrus formosus Armas and Martín-Frías, 2003 (squares); Diplocentrus hoffmanni Francke, 1977 (triangles); Diplocentrus kraepelini, n. sp. (crosses); Diplocentrus sagittipalpus, n. sp. (stars). B. Diplocentrus keyserlingii Karsch, 1880 (circles); Diplocentrus mitlae Francke, 1977 (squares); Diplocentrus rectimanus Pocock, 1898 (cross); Diplocentrus sissomi, n. sp. (triangles); Diplocentrus tenango Santibáñez-López and Francke, 2008 (star).

FIGURE 4. Diplocentrus keyserlingii group, dextral pedipalp chela, dorsoexternal aspect. A. Diplocentrus coylei Fritts and Sissom, 1996, ♂ (AMNH). B. Diplocentrus hoffmanni Francke, 1977, ♂ (CNAN). Scale bar = 1 mm.

FIGURE 5. Diplocentrus keyserlingii group, dextral pedipalp chela, dorsoexternal aspect. A. Diplocentrus keyserlingii Karsch, 1880, holotype ♂ (AMNH) of Diplocentrus reticulatus Francke, 1977. B. Diplocentrus mitlae Francke, 1977, holotype ♂ (AMNH). Scale bar = 1 mm.

FIGURE 6. Diplocentrus keyserlingii group, dextral pedipalp chela, dorsoexternal aspect. A. Diplocentrus rectimanus Pocock, 1898, ♂ (AMNH). B. Diplocentrus tenango Santibáñez-López and Francke, 2008, holotype ♂ (CNAN-T0273). Scale bar = 1 mm.

FIGURE 7. Diplocentrus keyserlingii group, carapace, dorsal aspect. A. Diplocentrus formosus Armas and Martín-Frías, 2003, ♂ (CNAN). B. Diplocentrus kraepelini, n. sp., paratype ♂ (AMNH). C. Diplocentrus sagittipalpus, n. sp., paratype ♂ (AMNH). D. Diplocentrus sissomi, n. sp., paratype ♂ (AMNH). Scale bars = 1 mm.

FIGURE 8. Diplocentrus keyserlingii group, sternum, genital operculum, and pectines, ventral aspect. A. Diplocentrus formosus Armas and Martín-Frías, 2003, ♂ (CNAN). B. Diplocentrus kraepelini, n. sp., paratype ♂ (AMNH). C. Diplocentrus sagittipalpus, n. sp., paratype ♂ (AMNH). D. Diplocentrus sissomi, n. sp., paratype ♂ (AMNH). Scale bars = 1 mm.

FIGURE 9. Diplocentrus keyserlingii group, sinistral hemispermatophore, dorsal aspect. A. Diplocentrus formosus Armas and Martín-Frías, 2003, ♂ (CNAN). B. Diplocentrus kraepelini, n. sp., paratype ♂ (AMNH). C. Diplocentrus sagittipalpus, n. sp., paratype ♂ (AMNH).D. Diplocentrus sissomi, n. sp., paratype ♂ (AMNH). Scale bars = 1 mm.

FIGURE 10. Diplocentrus keyserlingii group, dextral pedipalp femur, dorsal aspect. A. Diplocentrus formosus Armas and Martín-Frías, 2003, ♂ (CNAN). B. Diplocentrus kraepelini, n. sp., paratype ♂ (AMNH). C. Diplocentrus sagittipalpus, n. sp., paratype ♂ (AMNH). D. Diplocentrus sissomi, n. sp., paratype ♂ (AMNH). Scale bars = 1 mm.

FIGURE 11. Diplocentrus keyserlingii group, dextral pedipalp patella, external aspect. A. Diplocentrus formosus Armas and Martín-Frías, 2003, ♂ (CNAN). B. Diplocentrus kraepelini, n. sp., paratype ♂ (AMNH). C. Diplocentrus sagittipalpus, n. sp., paratype ♂ (AMNH). D. Diplocentrus sissomi, n. sp., paratype ♂ (AMNH). Scale bars = 1 mm.

FIGURE 12. Diplocentrus formosus Armas and Martín-Frías, 2003, dextral pedipalp chela, dorsoexternal aspect. A. ♂ (CNAN). B. ♀ (CNAN). Scale bar = 1 mm.

FIGURE 13. Diplocentrus formosus Armas and Martín-Frías, 2003, habitus, dorsal (A, C) and ventral (B, D) aspect. A, B. ♂ (CNAN). C, D. ♀ (CNAN). Scale bars = 10 mm.

FIGURE 14. Diplocentrus kraepelini, n. sp., dextral pedipalp chela, dorsoexternal aspect. A. Paratype ♂ (AMNH). B. Paratype ♀ (AMNH). Scale bar = 1 mm.

FIGURE 15. Diplocentrus kraepelini, n. sp., habitus, dorsal (A, C) and ventral (B, D) aspect. A, B. Paratype ♂ (AMNH). C, D. Paratype ♀ (AMNH). Scale bars = 10 mm.

FIGURE 16. Diplocentrus sagittipalpus, n. sp., dextral pedipalp chela, dorsoexternal aspect. A. Paratype ♂ (AMNH). B. Paratype ♀ (AMNH). Scale bar = 1 mm.

FIGURE 17. Diplocentrus sagittipalpus, n. sp., habitus, dorsal (A, C) and ventral (B, D) aspect. A, B. Paratype ♂ (AMNH). C, D. Paratype ♀ (AMNH). Scale bars = 10 mm.

FIGURE 18. Diplocentrus sissomi, n. sp., dextral pedipalp chela, dorsoexternal aspect. A. Paratype ♂ (AMNH). B. Paratype ♀ (AMNH). Scale bar = 1 mm.

FIGURE 19. Diplocentrus sissomi, n. sp., habitus, dorsal (A, C) and ventral (B, D) aspect. A, B. Paratype ♂ (AMNH). C, D. Paratype ♀ (AMNH). Scale bars = 10 mm.