Pachydema
Creators: name: Micó, Estefanía
name: Galante, Eduardo
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Pachydema

description: Key to the males of Pachydema species of the Canary Islands
All species of Canarian Pachydema are included in the key with the exception of P. integra (Wollaston), which was described using a single female. The species distribution (modified from Lacroix 2000) is shown in brackets. Locality records in bold have not been verified by us.
1. Prementum convex (Fig. 11 a). Maxillary teeth reduced, with setae or spine-like setae at apex (Fig. 12 a). .............. 2
- Prementum showing a deep concave area at apical third (Figs. 11 b–c). Maxillary teeth well developed (Fig. 12 b).. ..................................................................................................................................................................................... 6
2. Antennal club more than twice as long the preceding 4 antennomeres combined (Fig. 13 a). Genae protruding beyond canthus (Fig. 14 a). ......................................................................................................................................... 3
- Antennal club less than 1.5 times the preceding 4 antennomeres combined (Fig. 13 b). Genae not protruding beyond canthus (14b). [La Gomera]. ..................................................................................................... P. oromii López-Colón
3. Genae sharply angled and protruding beyond canthus (Fig. 14 a). Parameres as in Fig. 16 a. [Tenerife, La Gomera, Fuerteventura]. ............................................................................................................................... P. obscura (Brullé)
- Genae rounded and slightly protruding beyond canthus. ............................................................................................ 3
4. Second protarsomere not widened (1.8 times longer than wide) Parameres as in Fig. 16 b. [Tenerife]. .......................
................................................................................................................................. P. tinerfensis Galante & Stebnicka - Second protarsomere slightly widened (1.3 times longer than wide). ......................................................................... 5
5. Elytra conspicuously convex and slightly punctate. Anterior border of clypeus emarginate. Parameres as in Fig. 16 c. [Tenerife]. ................................................................................................................................. P. fortunatorum Baraud
- Elytra less convex. Anterior border of clypeus very slightly emarginate. Parameres as in Fig. 16 d. [Tenerife]. ......... ............................................................................................................................................................ P. jeannei Baraud
6. Scutellum with punctures at disc. Metatibia internal border not dilated at middle (Fig. 17 a). Parameres forcep shaped (narrow and sinuate, as in Figs. 16 e–h). ...................................................................................................................... 7
- Scutellum without punctures at disc. Metatibia internal border dilated at middle. Parameres not sinuate or arrow shaped (as in Figs. 16 i–n). ......................................................................................................................................... 10
7. Eyes large and laterally exposed. Front between eyes nearly twice as wide as eye diameter (Fig. 14 c). [Tenerife, La Gomera]. ....................................................................................................................................... P. castanea (Brullé)
- Eyes small and not laterally exposed. Front between eyes more than three times as wide as eye diameter. .............. 8
8. Apical maxillary palpomere narrowly oval (Fig. 15 a). Parameres as in Fig. 16 f. [Gran Canaria, Tenerife, La Palma, Fuerteventura, La Gomera]. .................................................................................................. P. fuscipennis (Brullé)
- Apical maxillary palpomere largely oval as in Fig. 15 b. ............................................................................................. 9
9. Frons and pronotum densely punctate. Parameres as in Fig. 16 g. [El Hierro, La Palma]. ... P. obscurella (Wollaston)
- Frons and pronotum less densely punctate. Parameres as in Fig. 16 h. [La Gomera]. ........... P. gomerae López-Colón
10. Eyes large and laterally exposed. Front between eyes nearly twice as wide as eye diameter. .................................. 11
- Eyes small and not laterally exposed. Front between eyes more than three times as wide as eye diameter. .......... 12
11. Apical maxillary palpomere large (ratio palpomere length/habitus length: 0.03) and widened (length 2.2 times the width). Third and fourth antennomeres short and wide (1.7 times longer than wide) (Fig. 2). Parameres slightly arrow shaped (Fig. 10). [Gran Canaria]. .............................................................................. P. megalops Micó sp. nov.
- Apical maxillary palpomere small (ratio palpomere length/habitus length: 0.01) and narrow (length 3.5 times the width). Third and fourth antennomeres long and narrow (3 times longer than wide) (Fig. 13 c). Parameres strongly arrow shaped (Fig. 16 i). [Gran Canaria]. ..................................................................................... P. lesnei Peyerimhoff
12. Second protarsomere strongly widened (almost as long as wide). Prementum widely notched and with the concave area very reduced (Fig. 11 c). Parameres as in Fig. 16 j. [Gran Canaria]. ............................................. P. keithi Lacroix
- Second protarsomere moderately widened (always longer than wide). Prementum shortly notched, with a wide concave area in the apical third as in Fig. 12 b. ................................................................................................................ 13
13. Apical maxillary palpomere narrowly oval (Fig. 15 e). Parameres as in Fig. 16 k. [Lanzarote, Fuerteventura]. ........... ........................................................................................................................................................... P. m e n i e r i Baraud
- Apical maxillary palpomere largely oval (Figs. f–h). ................................................................................................ 14
14. Parameres slightly arrow shaped (Fig.16 l). Scutellum bordered by more or less deeply impressed groove. [El Hierro, Gran Canaria, Tenerife, La Gomera]. ........................................................................... P. bipartita (Brullé)
- Parameres elongated. Scutellum without marginal groove or only present minimally at the base. .......................... 15
15. Pronotum with fine, sparse punctures. Parameres as in Fig. 16 n. [Gran Canaria, Lanzarote]. ..... P. navatteae Baraud
- Pronotal punctures moderate to coarse, densely distributed. Parameres as in Fig. 16 m. [Fuerteventura]. ................... ............................................................................................................................................... P. wollastoni Peyerimhoff
description: Published as part of Micó, Estefanía & Galante, Eduardo, 2009, A new species of Pachydema Laporte (Coleoptera: Scarabaeoidea: Scarabaeidae: Melolonthinae: Pachydemini) from the Canary Islands, pp. 41-47 in Zootaxa 2284 on pages 45-46, DOI: 10.5281/zenodo.191235