Astaena nigrona 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 : 107

publication ID

https://doi.org/ 10.5852/ejt.2021.750.1365

publication LSID

lsid:zoobank.org:pub:CE5D8517-AC04-4AF9-BD78-A2D6E21D33A8

DOI

https://doi.org/10.5281/zenodo.7401676

persistent identifier

https://treatment.plazi.org/id/038B976C-FF86-FFE3-CA29-C82C148DC9EC

treatment provided by

Felipe

scientific name

Astaena nigrona Saylor, 1947
status

 

Astaena nigrona Saylor, 1947

Figs 3K–O View Fig , 7A View Fig

Astaena nigrona Saylor, 1947b: 435 .

Astaena nigrona – Frey 1973: 331 (identification key).

non Astaena nigroana (incorrect subsequent spelling) – Evans 2003: 25 (checklist). — Evans & Smith 2005: 10 (checklist); 2007: 10 (checklist); 2009: 10 (checklist).

Type material examined

Holotype COLOMBIA • ♂; “ Rio Chil. Colum / L.W. Saylor Collection / California Academy of Sciences Type nº 7915 / Holotype Astaena nigrona L.W. Saylor ”; CAS.

Paratype COLOMBIA • 1 ♀; “ Bogota VI- Colum / L.W. Saylor Collection / Collection of the California Academy of Sciences, San Francisco, California / Allotype Astaena nigrona L.W. Saylor ”; CAS .

Holotype redescription

MEASUREMENTS. Length: 12 mm. Width: 5.8 mm.

HEAD. Reddish-brown. Labroclypeus, shape of anterior margin weakly sinuated medially. 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. Surface of pronotum and elytra with setae. Pronotum bicolored, reddish-brown with two red spots on laterals, widest at middle, anterior marginal line present, posterior marginal line absent, lateral margin strongly convex and smooth (not serrate), antero-lateral angle dorso-ventrally flattened, postero-lateral angle dorso-ventrally flattened, punctation on disc dense, setae of lateral margin sparse, median longitudinal excavation absent. Scutellum, punctures absent medially. Elytra unicolored, blackish-brown, surface opaque, microsculpture absent, punctation on intervals present, diameter of strial and interval punctation equal.

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 present. Metatibia, widest at apex, distal spines groups disposed at two thirds of metatibial length. First metatarsomere, ratio to dorsal metatibial spur: 1/3. Dorsal surface of tarsi glabrous, without punctures. Metatarsi, length of first protarsomere subequal to second and third combined, ventral margin serrated. 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. 3M–N View Fig .

CAS

USA, California, San Francisco, California Academy of Sciences

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Melolonthidae

Genus

Astaena

Loc

Astaena nigrona Saylor, 1947

Pacheco, Thaynara L., Monné, Marcela L., Vaz-De, Fernando Z. & Ahrens, Dirk 2021
2021
Loc

Astaena nigroana

Evans A. V. 2003: 25
2003
Loc

Astaena nigrona

Frey G. 1973: 331
1973
Loc

Astaena nigrona Saylor, 1947b: 435

Saylor L. W. 1947: 435
1947
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