|Scientific Name:||Succinea philippinica|
Succinea philippinica was described from the Philippines (Möllendorff 1893), but specimen material subsequently collected from Peleliu (Beliliou) in the Palau group (Smith (1993) and Yap in the Federated States of Micronesia (Zilch (1978) and BPBM records, C. Christensen pers. comm.) have been identified as being conspecific. It is presently unclear whether this is a widely distributed species that is indigenous to the Philippines, FSM and Palau, or whether a different species is endemic to Palau and/or FSM, but current understanding of succineid biogeography would suggest that a single species widely distributed over disparate islands is possible. Accordingly this assessment treats all records from Philippines, FSM and Palau as conspecific pending further research.
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Reviewer/s:||Pippard, H., Seddon, M. & Barker, G.|
This is a species that may have once been more widely distributed in Micronesia. Surveys of Palau in 2003, 2005 and 2007, and of FSM in 2005 led to the recovery of only one dead shell, which was discovered on the island of Tobi in the Southwest Islands of Palau. In addition, this species has not been collected on Peleliu since 1936, nor was it found during 2005 surveys of Yap, where it was also once collected. The species appears to have a very narrow geographic range, a large part of which has been subject to substantial habitat loss and modification, and all of which is subject to ongoing pressures from invasive species. Further taxonomic and survey work is urgently required in all parts of its range, but specifically in the Philippines, as its status in the Philippines is uncertain. The species is listed as Data Deficient pending further study.
This species was described from the Philippines (Möllendorff, 1893), where it has been recorded from the islands of Luzon, Samar, Leyte, Cebu, Bohol, Negros, and Mindanao. The species has also been recorded from Peleliu (Beliliou) in Palau by Y. Kondo of Bishop Museum in 1936 (Smith 1993, BPBM 158608) and Yap in the Federated States of Micronesia (BPBM records; C. Christensen pers. comm.). The species has not been collected alive anywhere in Palau since 1936. Surveys of Palau in 2003, 2005 and 2007, and of FSM in 2005, led to the recovery of only one dead shell, which was discovered on the island of Tobi in Hatohobei State in the southwest of Palau (Rundell 2005). The tiny, remote southwest islands are politically part of Palau (and are inhabited by humans), but are geographically and zoogeographically distinct from the main Palau archipelago.
Native:Micronesia, Federated States of ; Palau; Philippines
|Range Map:||Click here to open the map viewer and explore range.|
The present status of the species in the Philippines is not known. It is evidently rare in Palau and the Federated States of Micronesia. Despite earlier records, surveys of Palau in 2003, 2005 and 2007, and of FSM in 2005 led to the recovery of only one dead shell, which was discovered on the island of Tobi in Hatohobei State in the southwest islands of Palau (Rundell 2005).
|Habitat and Ecology:||This species is found in low moist, forested areas, a large part of which has been subject to substantial habitat loss and modification.|
This species is threatened by alteration of its lowland forest habitat. Historically, there would have been suitable vegetation on much of Peleliu, however this island has been subject to substantial modification of its vegetation in the last 100–200 years, including mining activities, human habitation, construction of an airstrip and the burning of vegetation during one of the bloodiest battles of World War II (Hinz 1995, Crombie and Pregill 1999). However, many Palau endemic land snails are still extant on Peleliu, so it is unclear why this species no longer appears to inhabit the island. Much vegetation has recovered since WWII, but it is possible that unlike some other endemic species, this species was extirpated from Peleliu at that time. If live individuals are ever found elsewhere in the southwest islands of Palau, an ongoing threat to this species would be clearing of vegetation for agriculture or habitation. Introduction of invasive snail species via plant material or shipping containers and boxes are also important threats to this species, as are increased populations of rats and mice, which are known to feed on snails.
Field work is urgently required to define the current distribution and population status and trends of this species. Surveys are urgently required in all parts of its known range - especially in the Philippines and Micronesia. The species' taxonomy also requires urgent clarification.
This species is not protected and there are no specific conservation plans in place at present. Identification of priority sites for conservation of this species, as well as reducing the impacts of human activities, is needed. The Palau Conservation Society has been supportive of recent land snail survey work in Palau.
|Citation:||Rundell, R.J. 2012. Succinea philippinica. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 12 December 2013.|
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