Astaena excisipes Saylor, 1947

Pacheco, Thaynara L., Monné, Marcela L., Vaz-De, Fernando Z. & Ahrens, Dirk, 2021, Revision of type specimens of Astaena (Coleoptera: Scarabaeidae: Melolonthinae: Sericini) described by L. W. Saylor, European Journal of Taxonomy 750 (750), pp. 94-123 : 100-101

Astaena excisipes Saylor, 1947

Figs 2A–D , 7A

Astaena excisipes Saylor, 1947b: 433 .

Astaena excisipes – Frey 1973: 347 (identification key). — Evans 2003: 22 (checklist). — Evans & Smith 2005: 7 (checklist); 2007: 7 (checklist); 2009: 7 (checklist).

Type material examined

Holotype ECUADOR • ♀; “Ecuador Baron / Coll. Kraatz / L.W. Saylor Collection / California Academy of Sciences Type nº 7910 / Astaena producta Bates ? / Moser det. / Holotype Astaena excisipes L.W. Saylor ”; CAS.

Holotype redescription

MEASUREMENTS. Length: 9.5 mm. Width: 4.7 mm.

HEAD. Reddish-brown. Labroclypeus, shape of anterior margin weakly sinuated medially. Ocular canthus with terminal setae, ratio to eye: 1/4. Ratio third vs fourth antennomere: 1/4. Fourth antennomere, lateral projection absent. Ratio fifth vs fourth antennomere: 1/5.

PRONOTUM AND ELYTRA. Surface of pronotum and elytra without setae. Pronotum unicolored, reddishbrown, widest at middle, anterior marginal line present, posterior marginal line absent, lateral margin straight and not serrated, two angles on postero-lateral margin present, antero-lateral angle dorsoventrally not flattened, postero-lateral angle dorso-ventrally not flattened, punctation on disc dense, median longitudinal excavation absent. Scutellum, punctures absent medially. Elytra unicolored, reddishbrown, surface opaque, microsculpture absent, punctation on intervals present and dense, diameter of strial and interval punctation equal.

ABDOMEN. Lateral carina present. Second visible ventrite without row of setae in medial region. Apical visible ventrite without suture to apical tergite.

LEGS. Metacoxa without longer lateral bristles, a laterally extended longitudinal shelf present. Metatibia, widest at apex, dorsal margin not carinated, ventral margin serrated, distal spines groups disposed at two thirds of metatibial length. First metatarsomere, ratio to dorsal metatibial spur: 1/2. Dorsal surface of tarsi glabrous, without punctures. Metatarsi, length of first protarsomere smaller than second and third combined, ventral margin serrated and setose. Protibia with three teeth. Protarsi, length of first protarsomere subequal to second and third combined, second protarsomere narrow, claws symmetrical, inner protarsal claw bifid.

Male

Unknown.

Remarks

The holotype specimen is a female; Saylor (1946) incorrectly stated that the holotype as a male.

Figures

Fig. 2. A–D. Astaena excisipes Saylor, 1947, holotype, ♀ (Type No. 7910; CAS). – E–I. A. explaniceps Saylor, 1947, holotype, ♂ (Type No. 7911; CAS). – J–M. A. fusagona Saylor, 1946, holotype, ♀ (Type No. 7912; CAS). A, J. Head and pronotum, dorsal view. B, G, K. labels. C, H, L. Habitus, dorsal view. D, I, M. Habitus, lateral view. E. Parameres, dorsal view. F. Aedeagus, lateral view. Scale bars: A, E–F, J = 0.5 mm; C–D, H–I, L–M = 1 mm.

Fig. 7. Distribution of type localities of the South American Sericini species described by Saylor. A. Astaena abaca Saylor, 1946, A. biciliata Saylor, 1946, A. bogotana Saylor, 1946, A. excisipes Saylor, 1947, A. explaniceps Saylor, 1947, A. incachaca Saylor, 1946, A. maqueta Saylor, 1947, and A. nigrona Saylor, 1947. B. A. fusagona Saylor, 1946, A. pygidia Saylor, 1946, A. rugithorax Saylor, 1946, A. salta Saylor, 1946, A. yungasa Saylor, 1946, and A. zyrota Saylor, 1946. C. Sayloria abcora (Saylor, 1946) comb. nov., S. bicoloripes (Saylor, 1946) comb. nov., and S. pottsi (Saylor, 1946) comb. nov..