Thyreocephalus halffteri Smetana, 1977

Márquez, Juan & Asiain, Julieta, 2016, Taxonomy of the Mexican species of Thyreocephalus Guérin-Méneville (Coleoptera: Staphylinidae, Xantholinini), Zootaxa 4169 (2), pp. 251-285: 268

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Thyreocephalus halffteri Smetana, 1977


Thyreocephalus halffteri Smetana, 1977 

(Figs. 4a, b, 5h, 9g, 11h, 13b)

Thyreocephalus halffteri Smetana, 1977: 349 

Diagnosis. This species can be confused principally with T. arizonicus  because their similar pattern of umbilicate punctation on the head. But T. halffteri  is smaller (14.5–18.3 mm), head almost as long as wide, with a visible smooth longitudinal belt at center of the dorsal surface of the head (Fig. 4a), aedeagus median size (1.2–1.3 mm), with the apical area moderately large, large parameres and internal sac moderately visible ( Figs. 9View FIGURE 9 g, 11h); whereas T. arizonicus  is larger (17.7–21.5 mm), head slightly longer than wide (1.11 times), without smooth longitudinal belt on the dorsal surface of the head, aedeagus longer (2.4–2.6 mm), with short apical area, parameres shorter and internal sac very visible.

Discussion. Smetana (1977) considers that T. halffteri  is more similar to T. rufipennis  and he gives several characteristics for their separation. As expected, some of the measures or proportions that this author indicates when comparing species have changed when we analyzed a bigger number of specimens, but still their information is taxonomically useful. Additionally, he distinguished T. halffteri  from T. puncticeps  by the differences in the size and form of the aedeagus, as well as the cephalic punctation. Probably the only aspect that this author did not make was to separate T. halffteri  from T. arizonicus  when he described the last species ( Smetana 1982), but here we provided taxonomic information that can be useful in their distinction.

Natural history. Similar to the previous species.

Distribution ( Fig. 13View FIGURE 13 b). Species exclusively from Mexico, recorded in the states of Guerrero, Jalisco, Estado de México, Michoacán, Morelos, Nayarit and Zacatecas ( Table 2) ( Smetana 1977).

Type material examined. Paratype (male): “ Mexico, Tizapan el Alto, estado de Jalisco, 19.VI.1968  . G. Halffter/ aedeagus on the plate/ genital segment on the plate/ Paratype Thyreocephalus halffteri A. Smetana, 1977  CNC No. 15355” (CNC).

Additional material examined. “Mexico: Guerrero, Chilpancingo, Ladera E Sierra del Alquitrán , altitud 1450 m, trampa de intercepción de vuelo, 16 a 19-VIII-2006, A. Bitar y L. Delgado cols.” (1♂, IEXA)  ; "Mexico: Guerrero, Km 100 Coyuca de Catalán-Zihuatanejo , 8-VI-1984, H. Bailovsky col.” (1♂, CNINAbout CNIN)  ; “Mexico: Guerrero, Tuxpan, Estación de Microondas , 24-V-1986, E. Barrera col.” (1♀, CNINAbout CNIN)  ; “ Jalisco, Ajijic, unter steinen (debajo de rocas), 21-V-1947, J. Hendrichs ”/ “ Ex Colección Jorge Hendrichs S. H. ” (1♂, CNINAbout CNIN)  ; “ Mexico: Estado de México, km 20 Tejupilco-Bejucos , 6-VI-1984, H. Brailovsky col." (1♂, 1♀, CNINAbout CNIN)  ; “Mexico: Michoacán, Morelia, Viejos Filtros , en suelo, 29-V-2012, J. Bueno col.” (1♀, UAEH)  ; “Mexico: Morelos, Tlayacapan  , San José de los Laureles , zonas 4–5, bajo roca, 1- III-1 997, J. Márquez col." (2♂, 2♀, UAEH)  ; “Mexico: Morelos, Tlayacapan  , San José de los Laureles , ex bajo roca, # 1210, 23-XI-1991, col. J. L. Navarrete, G. A. Quiroz y J. Márquez " (1♂, JLNH)  ; “Mexico: Morelos, Tlayacapan, Camino a Santa Catarina , zona 4, selva baja caducifolia, ex bajo roca de riachuelo, 30-XI-1996, J. Márquez col.” (1♂, MZFCAbout MZFC)  ; “Mexico: Morelos, Tlayacapan  , Santa Catarina, selva baja caducifolia y huertos, 16-VIII-1998, ex hojarasca, R. Toledo y J. Márquez cols." (1♂, MZFCAbout MZFC)  ; “Mexico: Morelos, Tlayacapan, selva baja caducifolia, zona 4, NTP-80, II-1996, J. Márquez y K. Villavicencio cols.” (1♂, MZFCAbout MZFC)  ; “4 St ”/ “ Ex Colección Jorge Hendrichs S. H. ” (2♂, CNINAbout CNIN); “ Morelos, Tepoztlán, 11-X-1945, C  . Bolivar ” (1♀, CNINAbout CNIN)  ; “Mexico: Zacatecas, Teúl de González, Camino a Milpillas , Arroyo Patitos , N 21° 21’ 05.2”, W 103° 34’00.1”, bosque de encino- Juniperus  , 1689 m, 31-I-2004, J. L. Navarrete-Heredia ” (1♀, JLNH)GoogleMaps  ; same data as previous, except: “ 6-II-2004, E. López y V. Gómez cols.” (1♂, JLNH)GoogleMaps  ; “ Zacatecas: Teúl de González Ortega, Arroyo Hondo , N 21°18’02.6”, W 103°35’56.8”, bosque de encino, 1831 m, 31-I-2004, J. L. Navarrete- Heredia y J. Cortés-Aguilar cols.” (1♂, JLNH)GoogleMaps  .


Coleccion Nacional de Insectos, Universidad Nacional Autonoma de Mexico


Museo de Zoologia "Alfonso L. Herrera"














Thyreocephalus halffteri Smetana, 1977

Márquez, Juan & Asiain, Julieta 2016


Thyreocephalus halffteri

Smetana 1977: 349