Post by Melanie on Jul 6, 2018 10:51:36 GMT 1
Scientific Name: Angraecopsis dolabriformis (Rolfe) Schltr.
Synonym(s):
Mystacidium dolabriforme Rolfe
Assessment Information [top]
Red List Category & Criteria: Extinct ver 3.1
Year Published: 2018
Date Assessed: 2015-12-24
Assessor(s): Simo, M., Stévart, T. & Droissart, V.
Reviewer(s): Lowry, P., Schatz, G.E., Onana, J.-M. & Rankou, H.
Justification:
The species is presumed Extinct according to the IUCN Red List Guidelines (IUCN Standards and Petitions Subcommittee 2016). The extent of occurrence (EOO) of Angraecopsis dolabriformis cannot be estimated because the species is only known from one collection. The species is known from one subpopulation and one location. No details of the preferred habitat of A. dolabriformis are available on the sheet of its only known specimen. Ninety-five per cent of the natural vegetation of the island was destroyed in the 19th and 20th centuries. Moreover, all remaining habitat on the island is now experiencing significant threats from industrial plantations, shifting agriculture, selective logging and wood cutting for small-scale subsistence use. Despite 18 months of intensive fieldwork on the island, collecting and growing orchids, no specimens were found that could be assigned to this species. Based on the information available, A. dolabriformis is assessed as Extinct.
Geographic Range [top]
Range Description:
Angraecopsis dolabriformis was endemic to São Tomé Island (São Tomé and Principe). It was only known from the type specimen (Henriques s.n.), collected in 1889, without locality. Its precise elevation range is also unknown, but was presumably somewhere between 100 and 800 m asl. The extent of occurrence (EOO) cannot be estimated, while the area of occupancy (AOO) would be estimated to be 4 km2, but as it is no longer extant it no longer has an EOO or an AOO..
Countries occurrence:
Regionally extinct:
Sao Tomé and Principe (Sâo Tomé)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 0-4 ♦ Continuing decline in area of occupancy (AOO): Yes
♦ Estimated extent of occurrence (EOO) - km2:
♦ Continuing decline in extent of occurrence (EOO): No
♦ Number of Locations: 0-1 ♦ Continuing decline in number of locations: Yes
♦ Lower elevation limit (metres): 100
♦ Upper elevation limit (metres): 800
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population:
The species was known only from the type specimen which represents one location.
Additional data:
♦ Number of mature individuals: 0
♦ Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology:
No details about the preferred habitat/ecology of Angraecopsis dolabriformis are available on the sheet of its only known specimen.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: The species is not known to be used or traded, however, specialist collectors with an interest in collecting and growing epiphytes might be interested in the species hence the range maps are not published here.
Threats [top]
Major Threat(s):
The species is known only from the type collection, discovered in 1892 and there are no details about its preferred habitat nor its locality on the herbarium sheet. The species was possibly rediscovered near São Nicolau (T. Stévart and collaborators pers. comm.). Unfortunately, a living plant collected by Stévart and his team died before producing flowers, thus making it difficult to confirm identification. The species has an inconspicuous habit and it is not known if it is still present on that island. São Nicolau is located in the north of São Tomé and remaining habitat in that part of the island is now experiencing significant threats from shifting agriculture, selective logging and wood cutting for small-scale subsistence.
Conservation Actions [top]
Conservation Actions:
The species is known only from the type specimen without locality. It is therefore difficult to know if there is any conservation actions in place for the species. Moreover, the island is now experiencing significant threats from shifting agriculture, selective logging and wood cutting for small-scale subsistence.
www.iucnredlist.org/details/87583558/0
Synonym(s):
Mystacidium dolabriforme Rolfe
Assessment Information [top]
Red List Category & Criteria: Extinct ver 3.1
Year Published: 2018
Date Assessed: 2015-12-24
Assessor(s): Simo, M., Stévart, T. & Droissart, V.
Reviewer(s): Lowry, P., Schatz, G.E., Onana, J.-M. & Rankou, H.
Justification:
The species is presumed Extinct according to the IUCN Red List Guidelines (IUCN Standards and Petitions Subcommittee 2016). The extent of occurrence (EOO) of Angraecopsis dolabriformis cannot be estimated because the species is only known from one collection. The species is known from one subpopulation and one location. No details of the preferred habitat of A. dolabriformis are available on the sheet of its only known specimen. Ninety-five per cent of the natural vegetation of the island was destroyed in the 19th and 20th centuries. Moreover, all remaining habitat on the island is now experiencing significant threats from industrial plantations, shifting agriculture, selective logging and wood cutting for small-scale subsistence use. Despite 18 months of intensive fieldwork on the island, collecting and growing orchids, no specimens were found that could be assigned to this species. Based on the information available, A. dolabriformis is assessed as Extinct.
Geographic Range [top]
Range Description:
Angraecopsis dolabriformis was endemic to São Tomé Island (São Tomé and Principe). It was only known from the type specimen (Henriques s.n.), collected in 1889, without locality. Its precise elevation range is also unknown, but was presumably somewhere between 100 and 800 m asl. The extent of occurrence (EOO) cannot be estimated, while the area of occupancy (AOO) would be estimated to be 4 km2, but as it is no longer extant it no longer has an EOO or an AOO..
Countries occurrence:
Regionally extinct:
Sao Tomé and Principe (Sâo Tomé)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 0-4 ♦ Continuing decline in area of occupancy (AOO): Yes
♦ Estimated extent of occurrence (EOO) - km2:
♦ Continuing decline in extent of occurrence (EOO): No
♦ Number of Locations: 0-1 ♦ Continuing decline in number of locations: Yes
♦ Lower elevation limit (metres): 100
♦ Upper elevation limit (metres): 800
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population:
The species was known only from the type specimen which represents one location.
Additional data:
♦ Number of mature individuals: 0
♦ Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology:
No details about the preferred habitat/ecology of Angraecopsis dolabriformis are available on the sheet of its only known specimen.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: The species is not known to be used or traded, however, specialist collectors with an interest in collecting and growing epiphytes might be interested in the species hence the range maps are not published here.
Threats [top]
Major Threat(s):
The species is known only from the type collection, discovered in 1892 and there are no details about its preferred habitat nor its locality on the herbarium sheet. The species was possibly rediscovered near São Nicolau (T. Stévart and collaborators pers. comm.). Unfortunately, a living plant collected by Stévart and his team died before producing flowers, thus making it difficult to confirm identification. The species has an inconspicuous habit and it is not known if it is still present on that island. São Nicolau is located in the north of São Tomé and remaining habitat in that part of the island is now experiencing significant threats from shifting agriculture, selective logging and wood cutting for small-scale subsistence.
Conservation Actions [top]
Conservation Actions:
The species is known only from the type specimen without locality. It is therefore difficult to know if there is any conservation actions in place for the species. Moreover, the island is now experiencing significant threats from shifting agriculture, selective logging and wood cutting for small-scale subsistence.
www.iucnredlist.org/details/87583558/0
