Astaena zyrota Saylor, 1946: 232 Astaena zyrota Frey 1973: 352 Evans 2003: 31 Smith 2005: 15 Revision of type specimens of Astaena (Coleoptera: Scarabaeidae: Melolonthinae: Sericini) described by L. W. Saylor Pacheco, Thaynara L. Monné, Marcela L. Vaz-De, Fernando Z. Ahrens, Dirk European Journal of Taxonomy 2021 2021-05-19 750 750 94 123 Saylor, 1946 L. W. Saylor 1946 [626,961,1152,1179] Insecta Melolonthidae Astaena Animalia Coleoptera 18 112 Arthropoda species zyrota   Figs 5F–J, 7B      Astaena zyrota Saylor, 1946: 232.    Astaena zyrota–  Frey 1973: 352(identification key). —  Evans 2003: 31(checklist). — Evans &  Smith 2005: 15(checklist); 2007: 16 (checklist); 2009: 16 (checklist).    Type material examined    HolotypeGUIANA • ♂; “Tumatumari VI Br Guiana / L.W. Saylor Collection / California Academy of Sciences Type nº 7921 / Holotype  Astaena zyrotaL.W. Saylor”; CAS.    Holotyperedescription  MEASUREMENTS. Length: 7.5 mm. Width: 4.5 mm. HEAD. Reddish-brown, surface without setae. Labroclypeus, shape of anterior margin weakly sinuated medially, posteriorly with sparse punctation. Ocular canthus without terminal setae, ratio to eye: 1/4. Antennae with eight antennomeres; antennal club with three antennomeres; ratio antennal club/remaining antennomeres: 1/1.5; ratio third vs fourth antennomere: 1/3; fourth antennomere, lateral projection absent; ratio fifth vs fourth antennomere: 1/5. PRONOTUM AND ELYTRA. Pronotum unicolored, reddish-brown, widest at middle, anterior marginal line present, posterior marginal line absent, lateral margin weakly convex and not serrated, antero-lateral angle dorso-ventrally not flattened, postero-lateral angle dorso-ventrally not flattened, punctation on disc dense, setae of lateral margin sparse, median longitudinal excavation absent. Scutellum, punctures absent medially. Elytra unicolored, reddish-brown, surface opaque, microsculpture absent, punctation on intervals present, punctation on intervals dense, diameter of strial and interval punctation equal.   Fig. 5. A–E.  Astaena yungasa Saylor, 1946, holotype, ♂ (Type No. 7920; CAS). – F–J.  A. zyrota Saylor, 1946, holotype, ♂ (Type No. 7921; CAS). – K–L.  Sayloria bicoloripes( Saylor, 1946), paratype, ♂ (CAS). – M–O.  S. bicoloripes, holotype, ♀ (Type No. 7908; CAS). A, F, L. Aedeagus, lateral view. B, G, K. Parameres, dorsal view. C, H, M. Labels. D, I, N. Habitus, dorsal view. E, J, O. Habitus, lateral view. Scale bars: A–B, F–G, K–L = 0.5 mm; D–E, I–J, N–O = 1 mm. ABDOMEN. Lateral carina present. Second visible ventrite with 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 absent. Metatibia, widest at apex, ventral margin not 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 glabrous. Protibia with three teeth. Protarsi, length of first protarsomere subequal to second and third combined, second protarsomere narrow, claws asymmetrical, inner protarsal claw bifid, apex of basal tooth of inner protarsal claw truncate. AEDEAGUS. Fig. 5F–G. 3383726314 CAS L. W. Saylor Collection Guyana California Academy of Sciences Type 18 112 1 1 holotype