Taxonomic revision of the Phanaeus endymion species group (Coleoptera: Scarabaeidae), with the descriptions of five new species
Moctezuma, Victor
Halffter, Gonzalo
European Journal of Taxonomy
2021
2021-04-28
747
1
71
874G3
Moctezuma & Halffter, 2021
Moctezuma & Halffter
2021
[617,872,672,699]
Insecta
Scarabaeidae
Phanaeus
Animalia
Coleoptera
44
45
Arthropoda
species
rzedowskii
sp. nov.
urn:lsid:zoobank.org:act: A98B849A-4240-4DD3-9997-D0B3CB7B00C2 Figs 1O, 2K, 13, 15, 18P, 19P
Diagnosis This is the only species within the P. endymionspecies group where major males show a pronotal disc with a superficially impressed midline ( Fig. 2K).
Etymology We are honoured to name the new species after Jerzy Rzedowski, to recognise his outstanding contribution to the knowledge of the Mexican biodiversity, particularly to the flora from El Bajío region.
Tyepa material( 2 ♂♂, 2 ♀♀) Holotype MEXICO– Michoacán• ♂; “ Coalcoman. 24-VII-90. Fungus. Terry Taylorcol”; TAMU. Paratypes MEXICO– Michoacán• 1 ♀; same collection data as for holotype; TAMU• 1 ♂, 1 ♀; “ Villa Victoria. 31-VIII- 95. 1550 m”; VMC. Type locality Mexico, Michoacán, Coalcomán.
Description Major male( holotype) Length 18 mm. HEAD. Clypeus bidentate, black on anterior margin, dark metallic blue-green on posterior portion, roughened sculpture. Genae dark metallic blue-green, with roughened sculpture. Front dark metallic blue-green on portions adjacent to cephalic horn. Cephalic horn black, curved posteriorly over pronotum ( Figs 2K, 13A). PRONOTUM. Uniformly dark metallic blue-green, becoming completely black on and beneath lateral margins of posterolateral angles, and on posterior margin. Keel absent in the middle of anterior pronotal margin. Disc triangular, flat, with two distinctly developed tubercles on anterior portion. Triangle lightly granulate, with midline superficially impressed, scabriculous, impunctate. Sides with smooth sculpture, scabriculous, with superficially impressed punctures. Lateral lines of pronotal triangle straight. Posterolateral angles sharply acute, projected posteriorly. Lateral fossae distinctly impressed. Basal fossae obtusely oval, distinctly impressed. Posterior margin with superficially impressed punctures ( Figs 2K, 13A). ELYTRA. Fine striae, dark blue-green, with superficially impressed punctures, scabriculous, impressed basally as distinct fossae. Interstriae black, scabriculous, partially roughened, with superficially impressed punctures. Sutural margin without apical tooth ( Fig. 13A). PROTIBIAE. Quadridentate with apical spine. TERGITE VIII. Dark metallic blue-green, scabriculous; with rough, superficially impressed punctures. Basal margin with setae variable in size. GENITALIA. Right lobe of endophallite copulatrix more developed than left lobe. Right lobe obtusely triangular in shape, sharply acute frontally, rounded superiorly. Left lobe strongly developed, obtusely lobed. Central ridge more developed than central column ( Fig. 1O). Minor male Unknown. Female Similar to the male, except for the head showing a cephalic trituberculate carina; with almost aligned, conical tubercles, similar in size tubercles; frons distinctly impressed, rough punctures; pronotal sculpture completely smooth, with superficially impressed punctures; colour of pronotum as in P. endymion; pronotal process trituberculate, posteriorly concave; dentiform middle tubercle, strongly developed, more frontally projected than lateral tubercles; almost completely reduced lateral tubercles ( Fig. 13B). Fig. 13. Phanaeus rzedowskii sp. nov. A. Holotype, ♂ (TAMU). B. ♀ (VMC). Variation Mean length 17.4 mm( 16.5–18.2 mm). Chromatic variation was not observed in the typeseries.
Distribution Sierra Madre del Sur, southern Michoacán( Fig. 15).
Remarks This new species was previously confused with P. endymion( Edmonds 1994). Nevertheless, the distribution areas for P. endymionand P. rzedowskii sp. nov.are completely different, and they are easily recognized by external and genital morphology.
3093980401
[189,1239,1186,1213]
1990-07-24
TAMU
Terry Taylor
Mexico
Coalcoman
44
45
1
1
Michoacan
holotype
3093980476
[189,1078,1287,1314]
TAMU
Fungus. Terry Taylor
Mexico
Michoacan
44
45
1
1
Michoacan
paratype
3093980546
1995-08-31
VMC
Mexico
0
Villa Victoria
44
45
2
1
1
Michoacan de Ocampo
paratype