The Parnassos Stone Grasshopper (Glyphanus obtusus) is endemic to Greece and has only been reported from the southeastern part of the Greek mainland and the adjoining northern part of the Peloponnesus. Currently, the presence of the species has been confirmed from four sites only: three in Parnassos National Park and one southwest of Athens. This species is assessed as Endangered because: (a) it has a restricted geographic range (estimated area of occupancy is between 80 and 150 km²), (b) it is estimated to occur in only five locations, and (c) there is an inferred continuing decline in this species' extent of occurrence, area of occupancy, extent and quality of its habitat, number of subpopulations, and in the number of mature individuals due to urbanization, tourism and renewable industry development. The area of one site where the species still occurs has been significantly reduced by urbanization due to development of a winter-sport village. Conservation measures include: banning artificial land expansion in the habitats of the species (urbanization, tourism, renewable infrastructure), maintaining them in a favourable conservation status through mild sheep/goat grazing activity, supporting further research on the distribution and ecology of the species and initiating a monitoring scheme to be held by the Natura 2000 staff in its habitats.

The Parnassos Stone Grasshopper is endemic to Greece and has only been reported in the past from the southeastern part of the Greek mainland and the adjoining northern part of the Peloponnesus (Willemse 1984, Willemse and Willemse 2008, Willemse et al. 2018). The presence of the species has recently been confirmed from only four sites: three in the National Park of Parnassos (Kati et al. 2022) and one southwest of Athens. This species' estimated extent of occurrence (EOO), based on available data points, is 9,200 km², and its area of occupancy (AOO) is between 80 and 150 km². Its population is severely fragmented, and it is estimated to occur in five locations.

For most sites from where this species has been reported in the past, only a single observation/collection exists. The presence of the species has been recently confirmed within the national park of Parnassos in three localities above 1,000 m, but with very low population densities of 1–2 individuals/100 m² (Kati et al. 2022). On Mt. Parnassos, a winter-sport village was built on top of one of the known localities in the past. The Parnassos Stone Grasshopper is an apterous species of the family Pamphagidae, with very low dispersal ability, having very small subpopulations with low detection rates. The subpopulations of this species are isolated with no or little genetic exchange, and the population is therefore considered severely fragmented. A continuing decline in the population size is inferred due to habitat loss.

The habitat where this species is found on Mt. Parnassos consists of open rocky slopes and flat areas covered with sparse vegetation of herbs and grasses interspersed with some bushes like Juniperus. Its habitats in Parnassos National Park include spiny Mediterranean heaths (F7) and alpine and subalpine grasslands (E4), according to EUNIS classification. The species was recorded in microhabitats with substantial herbaceous vegetation cover, stony and rocky substrate presence with spots of bare soil. The average vegetation height was 20 cm with dominant plant species: Festuca jeanphertii, Dasypyrum villosum and Quercus coccifera (Kati et al. 2022). There is no available information on the habitat at the other sites where this species has been found. It inhabits areas between 300–1,1350 m asl.

The main threat to the species is the expansion of artificial land through human infrastructure expansion, including urbanization, touristic development and renewable energy industry development. In the Attica region, the local population has probably been affected in the past by urbanization, which is an ongoing threat. In the plateau on Mt. Parnassos above Arachova, a winter-sport village was built on top of a subpopulation of this species in the 1970s to 1990s. Mt. Parnassos is used for skiing in the winter. Further touristic development and related infrastructure expansion might affect the species in the future, as it was also recorded in mountainous grasslands. In three out of the five localities of the species (broader area of Parnassos, Thisvi, Korinthos), wind power stations are planned that might affect the local populations in the future. The cumulative effect of all development activities taking place can be very serious. Most slopes inhabited by the species are used for sheep/goat grazing in Mt Parnassos, but this pressure's impact does not seem to affect the local populations.

This species is not utilized.

Currently, no conservation measures are in place for this species, but it is found throughout its range in protected areas of the Natura 2000 network. Likewise, there are no conservation plans drawn up. The management authority of Parnassos National Park funded a small study to obtain more data for the protected area's endemic and threatened orthoptera species. The study suggested banning artificial land expansion in the habitats of Parnassos Stone Grasshopper, maintaining favourable conservation status of the Habitats' Directive habitats 4090 and 934A where the species occurs, maintaining the present mild sheep/goat grazing activity, supporting further research on the distribution and ecology of the species and initiating an annual monitoring scheme for the species by the National Park authorities (Kati et al. 2022). Further research is needed to update its distribution and local population status and assess the threats to this species nationwide. The population trend of local subpopulations should also be monitored. Spatial planning for urban and industrial development considering the populations of Parnassos Stone Grasshopper is also recommended.