| Hasseltides | |
|---|---|
 Hasseltides primigenius Weyenbergh 1869, type specimen from Teyler Museum, by van Regteren Altena (1954). | |
|
Class |
Crinoidea |
|
Order |
Roveacrinida |
|
Family |
Saccocomidae |
Hasseltides Weyenbergh 1869 was for a time thought to be a monotypic genus of supposed Opiliones. It was made more interesting as was long thought to be the single known Mesozoic harvestman. The synonymy was made by comparison with better preserved specimens from the same site, instead of against recent animals.
Type species[]
† Hasseltides primigenius Weyenbergh 1869, which is a junior synonym of Saccocoma bajeri (Koenig, 1825).
Type data[]
GERMANY, Bavaria, Solnhofen limestone.
Horizon[]
Jurassic.
Synonymy[]
Hasseltides is a junior synonym of the extinct crinoid genus † Saccocoma Agassiz 1836 (van Regteren Altena, 1954).
Placement[]
Hasseltides was originally thought to be a fossil spider of the family Agelenidae (Weyenbergh 1869). It was subsequently reinterpreted by Weyenbergh (1874) as a harvestman (following a personal communication by van Hasselt), and which he chose to place closest to Acantholophus. Later, Weyenbergh (1878) changed once more his opinion, and placed it in Gonyleptidae, closest to Pachylus. Petrunkevitch (1953) suggested it belongs to Laniatores. Hasseltides was eventually shown to be a crinoid (van Regteren Altena 1954).