Skip to main content
Entomology 2020 Main banner
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
Presentation Icons
Plenary
Plenary
Livestream
Livestream
On-Demand
On-Demand
Student Competition
Student Competition
Video Chat
Video Chat
Panel Discussion
Panel Discussion
Mixer
Mixer
Poster Icons
Poster
Poster
Student Competition
Student Competition
ViewAttendees 9

SysEB

10-Minute Paper

10-min: SysEB, Ecology and Behavior

Altitudinal stratification of the passalid (Coleoptera: Passalidae) community in the Guatemalan Southern Volcanic Chain

On-Demand
On-Demand
The distribution of passalid beetle species is stratified in an altitudinal gradient. As a rule, a change from lowland and geographical broadly distributed species to montane endemics happens after 1500 m above sea level (a.s.l.). In 1981, MacVean & Schuster reported the findings of the altitudinal stratification of passalid communities from two volcanoes in Guatemala. We revisited both transects done in 1981 and compared the community composition and temporal beta diversity in the passalid fauna of the Atitlán and Santa María volcanoes. We collected all but one (Chondrocephalus debilis [Bates, 1886]) of the reported species by MacVean & Schuster and found three additional species. We found two key differences in the passalid community of the volcanoes: (a) For Atitlán, the species turnover line from lowland to montane species shifted from 1,500 to 1,800 m a.s.l.; and (b) in Santa María, we collected passalid beetles above 2,700 m a.s.l., which was the upper limit of their occurrence as documented in the 1981 study.