Ptilothrix sumichrasti Cresson, 1878

Florez-Gomez, Nathalia & Danforth, Bryan, 2023, The North American bees of the genus Ptilothrix Cresson, 1878 (Hymenoptera, Apidae, Emphorini), with the description of two new species, Journal of Hymenoptera Research 95, pp. 275-293 : 275

Ptilothrix sumichrasti Cresson, 1878

Figs 2E, F , 3E, F , 4A , 5 , 7

Ptilothrix sumichrasti Cresson, E. T. (1878). (Lectotype: ANSP #f: Mexico).

Diagnosis.

Body size of females from 10-10.6 mm, males 8.2-10 mm. This species is morphologically similar to P. chiricahua but is recognizable by the punctation pattern in the ocellocular area, which is micro-sculptured, with punctures towards the eye margin and a small area around the lateral ocellus polished and shiny in both sexes. Males are clearly distinguishable by the brown pubescence covering T7, in addition to the shape of S7, S8 and genital capsule (Figs 2E, F , 3E, F ). This species shares with P. chiricahua the following characters: fulvous pubescence on pronotum, scutum, scutellum, whitish towards the mesepisternum and propodeum. Metasoma with apical bands of yellowish appressed hairs from T1-T4. Anterior area of T3-T5 with black, short appressed hairs. First flagellomere length less than twice its apical width, being shorter than the rest of species in the genus Ptilothrix (Fig. 4A ).

Material examined.

Mexico - Guerrero • 1 ♂; Iguala; CNIN 2887 - Michoacán • 1 ♀; La Mira , 4 km N Playa Azul; 2 Nov. 1987; T. Griswold leg.; BBSL 725135 • 1 ♂; Los Amates , 26 km N Playa Azul; 2 Nov. 1987; T. Griswold leg.; on Ipomoea ; BBSL 725132 • 2 ♂; Caleta de Campos, 4 kmN Playa Azul ; 3 Nov. 1987; T. Griswold leg.; BBSL 725133 to 725134 - Oaxaca • 1 ♂; 4 mi. N Pochutla. 11 Oct. 1975; J.L. Neff leg.; CTMI - Puebla • 6 ♀; Tilapa, Carr. Fed. Azucar de Matamoros-Cuautla ; 18°37.96'N, 98°34.96'W; 4 Sep.1998; T. Griswold leg.; BBSL 335125 to 335130 .

Guatemala • 3 ♀; C.A; alt. 300 m; 10 Jan.1923;> AMNH 262013 to 262015 .

Comments.

Records of this species are from lowlands in Guatemala and Mexico in the Transmexican Volcanic Belt and the Balsas River Basin (Fig. 5 ), it is seemingly associated with flowers of Ipomoea and has been collected from October to January.

Figures

Figure 2. A Ptilothrix chiricahua sp. nov. male S 7 B Ptilothrix chiricahua sp. nov. male S 8 C Ptilothrix zacateca sp. nov. male S 7 D Ptilothrix zacateca sp. nov. male S 8 E Ptilothrix sumichrasti male S 7 F Ptilothrix sumichrasti male S 8 G Ptilothrix bombiformis male S 7 H Ptilothrix bombiformis male S 8.

Figure 3. A, B Ptilothrix chiricahua sp. nov. male genital capsule A dorsal view B ventral view C, D Ptilothrix zacateca sp. nov. male genital capsule C dorsal view D ventral view E, F Ptilothrix sumichrasti male genital capsule E dorsal view F ventral view G, H Ptilothrix bombiformis male genital capsule G dorsa view F ventral view.

Figure 4. Ocellocular area and antenna of A female lectotype of Ptilothrix sumichrasti B female paratype of Ptilothrix chiricahua sp. nov. C female paratype of Ptilothrix zacateca sp. nov.

Figure 5. Distribution map of the North American species of the genus Ptilothrix: Ptilothrix chiricahua sp. nov., Ptilothrix zacateca sp. nov., Ptilothrix sumichrasti and Ptilothrix bombiformis.

Figure 7. Ptilothrix sumichrasti A female lectotype habitus, lateral view B female lectotype habitus; frontal view C female lectotype, dorsal view D female lectotype habitus metasoma E male habitus, lateral view F male habitus, frontal view G male dorsal view H male metasoma.