Ateuchus benitojuarezi, Moctezuma, Victor, Sanchez-Huerta, Jose Luis & Halffter, Gonzalo, 2018

Moctezuma, Victor, Sanchez-Huerta, Jose Luis & Halffter, Gonzalo, 2018, Two new species of Ateuchus with remarks on ecology, distributions, and evolutionary relationships (Coleoptera, Scarabaeidae, Scarabaeinae), ZooKeys 747, pp. 71-86 : 72-74

Ateuchus benitojuarezi sp. n. Figs 1, 2

Type material

(100 ♂♂, 161 ♀♀). Holotype: 1 ♂, labeled "MEXICO, Oaxaca, San Miguel Chimalapa, San Antonio, 14-X-2015, coprotrap; 16°39'39.3"N, 94°13'23.6"W, cloud forest, 1605 m, V. Moctezuma col.". Paratypes: 1 ♂, 1 ♀, same data as holotype; 1 ♂, 1 ♀, same data except " 16°39'40.9"N, 94°13'25.1"W, 1611 m"; 1 ♂, same data except " 16°3'38.3"N, 94°13'39.8"W, 1702 m"; 5 ♂♂, 7 ♀♀, same data except " 16°39'42.5"N, 94°13'15.1"W, 1553 m"; 4 ♂♂, 8 ♀♀, same data except " 16°39'41.2"N, 94°13'15.6"W, 1562 m"; 6 ♀♀, same data except " 16°39'40.7"N, 94°13'19.7"W, 1593 m"; 3 ♂♂, 1 ♀, same data except "16°39'40.2"N, 94°13'21"W, 1595 m"; 1 ♂, 2 ♀♀, same data except " 16°39'41.8"N, 94°13'13.9"W, 1548 m"; 1 ♀, same data except " 16°39'37.5"N, 94°13'27.1"W, 1621 m"; 2 ♂♂, 3 ♀♀, same data except " 16°39'41.1"N, 94°13'16.9"W, 1573 m"; 1 ♂, 1 ♀, same data except " 16°39'42.5"N, 94°13'15.1"W, 1553 m"; 1 ♂, same data except " 16°39'36.8"N, 94°13'29.8"W, 1636 m"; 1 ♂, same data except " 16°39'36.7"N, 94°13'13.1"W, 1647 m"; 2 ♂♂, 1 ♀, same data except "03-VII-2017, 16°39'44.5"N, 94°13'14.6"W, light trap UV and metallic additives, 1550 m", J.L. Sánchez-Huerta and V. Moctezuma cols."; 1 ♀, labeled "MEXICO, Oaxaca, San Miguel Chimalapa, Benito Juárez, 8-X-2015, coprotrap, 16°43'58.4"N, 94°12'17"W, cloud forest, 1356 m, V. Moctezuma col."; 1 ♀, same data except " 16°44'6.2"N, 94°12'20.6"O, 1374 m"; 5 ♂♂, 7 ♀♀, same data except " 16°44'10.9"N, 94°12'17.5"W, 1389 m"; 5 ♀♀, same data except " 16°44'5.9"N, 94°12'20.5"W, 1384 m"; 5 ♀♀, same data except " 16°43'58.6"N, 94°12'22.8"W, 1341 m"; 3 ♀♀, same data except " 16°44'12.3"N, 94°12'17.7"W, 1400 m"; 1 ♂, 3 ♀♀, same data except " 16°44'10.9"N, 94°12'17.5"W, 1389 m"; 1 ♂, 3 ♀♀, same data except " 16°44'7.1"N, 94°12'20.4"W, 1373 m"; 1 ♀, same data except " 16°44'12.3"N, 94°12'17.7"W, 1400 m"; 1 ♂, 1 ♀, same data except "16°44'2.4"N, 94°12'20.4"W, 1372 m"; 3 ♂♂, 11 ♀♀, same data except "16°43'53.9"N, 94°12'21"W, 1338 m"; 1 ♂, 1 ♀, same data except " 16°44'13.6"N, 94°12'18.1"W, 1405 m"; 2 ♀♀, same data except "16°43'54"N, 94°12'18.4"W, 1347 m"; 1 ♀, same data except "16°43'57.3"N, 94°12'23"W, 1344 m"; 1 ♀, same data except " 16°44'23.3"N, 94°12'19.3"W, 1275 m"; 2 ♂♂, 4 ♀♀, same data except " 16°43'59.4"N, 94°12'22.3"W, 1342 m"; 19 ♂♂, 16 ♀♀, same data except "16°44'30.6"N, 94°12'20"W, 1269 m"; 1 ♂ same data except " 16°44'22.1"N, 94°12'19.9"W, 1293 m"; 2 ♀♀, same data except " 16°44'0.5"N, 94°12'22.1"W, 1360 m"; 3 ♀♀, same data except " 16°44'4.8"N, 94°12'19.9"W, 1382 m"; 19 ♂♂, 34 ♀♀, same data except " 16°44'29.3"N, 94°12'20.1"W, 1275 m"; 9 ♂♂, 8 ♀♀, same data except " 16°44'28.1"N, 94°12'20.9"W, 1292 m"; 1 ♀, same data except "9-X-2015, 16°44'22.5"N, 94°13'4.8"W, 1173 m"; 1 ♂, same data except " 16°44'21.9"N, 94°13'1.9"W, 1140 m"; 2 ♂♂, 2 ♀♀, same data except " 16°44'35.6"N, 94°13'17.5"W, 1113 m"; 3 ♀♀, same data except " 16°44'17.1"N, 94°13'4.5"W, 1175 m"; 2 ♂♂, 1 ♀, same data except " 16°44'15.8"N, 94°13'4.1"W, 1180 m"; 1 ♂, same data except " 16°44'40.7"N, 94°13'17.4"W, 1110 m"; 2 ♂♂, same data except "16°44'26.9"N, 94°13'9"W, 1130 m"; 1 ♀, same data except " 16°39'40.1"N, 94°13'22.4"W, 1599 m"; 1 ♂, 1 ♀, same data except " 16°44'36.9"N, 94°13'17.3"W, 1112 m"; 1 ♂, 2 ♀♀, same data except "16°44'22"N, 94°13'3.3"W, 1152 m"; 1 ♀, same data except " 16°44'14.6"N, 94°13'4.7"W, 1190 m"; 2 ♂♂, 4 ♀♀, same data except " 16°44'11.5"N, 94°13'6.5"W, 1204 m"; 1 ♂, 1 ♀, same data except " 16°44'16.3"N, 94°13'16.3"W, 1112 m"; 1 ♂, 2 ♀♀, same data except " 16°44'27.1"N, 94°13'11.1"W, 1137 m"; 1 ♂, 1 ♀, same data except " 16°44'27.3"N, 94°13'12.5"W, 1133 m"; 1 ♀, labeled "MEXICO, Oaxaca, Santa María Chimalapa, Cerro Azul, 19-X-2015, coprotrap, 16°51'37.9"N, 94°43'32.5"W, subtropical rainforest, 382 m, V. Moctezuma col."; 1 ♀, same data except " 16°51'32.8"N, 94°43'30.8"W, 392 m".

Type deposition.

Holotype and 10 ♂♂, 10 ♀♀ paratypes will be deposited in IEXA. Paratypes will be deposited in the following collections: CEMT (10 ♂♂, 10 ♀♀), CMNC (10 ♂♂, 10 ♀♀), CNIN (10 ♂♂, 10 ♀♀), FSCA (10 ♂♂, 10 ♀♀), JLSHC (10 ♂, 10 ♀), TAMU (10 ♂♂, 10 ♀♀), VMC (rest of paratypes).

Description.

Holotype male, total length 7.9 mm, maximum elytral width 4.5 mm. Body elongate-oval and convex, dorsum and venter glossy black with cupreous red and green sheen, clypeal margin dark reddish brown. Clypeal margin slightly V-shaped, with rounded teeth, lateral margin of head arcuate. Clypeal surface with coarse and well-spaced punctures, frons surface finely punctate with punctures of regular size, well-impressed clypeogenal suture, genae finely punctate. Pronotum strongly punctate, with coarse punctures of regular size, midline impressed on posterior half of pronotum, anterior pronotal margin incomplete. Pronotal lateral angles acute. Center of pronotal posterior margin with a line of coarse and large punctures. Proepisternum and proepimeron coarsely wrinkled. Elytral surface smooth, shiny, and punctate. Striae well-impressed, becoming deeply impressed on elytral apex. Well-impressed strial punctures, slightly wider than striae. Interstriae flat. Pygidium strongly convex and finely punctate. Pygidium dark reddish brown with green metallic sheen on apex. Protibia tridentate, apical spur expanded into a rectangular shape. Mesotibia with two apical spiniform spurs. Metatibia with apical spur small and spiniform. Ventral apical half of profemur finely punctate, but punctures becoming coarse along posterior margin of profemur. Ventral surface of meso- and metafemur minutely punctate. Internal sac of the aedeagus with two hook-shaped and one filiform copulatrix lamellae; three accessory sclerites (one large canoe-shaped, one small and flat, and one bispiniform); welldeveloped raspule.

Female. Differs from the male by protibia with apical spur expanded into a slightly irregular oval shape, clypeal teeth less rounded and more acute, last abdominal sternite broader and pygidium less convex.

Variation

(among 30 randomly selected paratypes). Mean total length 8.1 mm (7.5-8.7 mm). Mean elytral width 4.5 mm (4.2-4.9 mm). Type series color is uniform.

Etymology.

We dedicate this species to Benito Juárez, the first indigenous president of Mexico. The name also refers to one of the localities where the type series was collected.

Geographical distribution.

The type series was collected in three sites of the region of Los Chimalapas, in the east of the state of Oaxaca: San Antonio, Benito Juárez, and Cerro Azul (Fig. 3).

Ecology.

Ateuchus benitojuarezi inhabits the cloud forest and the subtropical rainforest, within an elevational range of 380 to 1700 m asl. This species was collected using pitfall traps baited with human dung and with a light trap (mercury vapor and UV light).

Diagnosis.

Ateuchus benitojuarezi is distinguished from other Ateuchus present in Mexico by the following combination of characters: dorsum glossy black with red and green cast, pronotum strongly punctate, anterior margin of pronotum incomplete, posterior pronotal margin with a line of coarse and large punctures, elytral surface smooth and the male genitalia includes one large canoe-shaped lamellae with an apical claw (Fig. 2a).

Remarks.

Ateuchus benitojuarezi seems to be closely related to A. guatemalensis (Fig. 4), but the clypeal margin is slightly V-shaped in benitojuarezi males (broadly V-shaped in guatemalensis males) and the large canoe-shaped accessory lamellae of benitojuarezi shows an apical claw (this apical claw is missing in guatemalensis ; Fig. 5a).