"Description of a new genus of pulmonary gastropods". 1 offspring of three species of arionid slug, resulting in a loss of ‘species-specific’ colour character-istics. Disjunct distributions can occur when suitable habitat is fragmented, which produces fragmented populations, and when that fragmentation becomes so divergent that species movement between one suitable habitat to the next is disrupted, isolated population can be produced.Extinctions can cause disjunct distribution, especially in areas where only scattered areas … Habitat. [18] As in Arion, sperm is transferred in a spermatophore. The Kerry slug, a member of the order Panpulmonata, is terrestrial; it breathes air with a lung. In fact, a better suiting description would be a generalist that feeds a plethora of organic matters including leaves of living plants, lichens and mushrooms some slugs are even found to feed on small fruits such as strawberries. The Kerry slug is a hermaphrodite, as are all pulmonates. The slug is attractively marked with white or yellow spots. The Kerry slug (Geomalacus maculosus) is notable for its distribution, being found only in Kerry and West Cork in Ireland as well as in northern Spain and Portugal. prohibit the deliberate or non-deliberate ‘deterioration or destruction of breeding sites or resting places’. The largest eggs are more elongate, being 8.5 mm × 4.25 mm (0.335 by 0.167 inches); the smallest are more ovoid and are 6 mm × 3 mm (0.24 in × 0.12 in). The Kerry slug or Kerry spotted slug, scientific name Geomalacus maculosus, is a rare species of medium-sized to large air-breathing land slug.It is a terrestrial pulmonate gastropod mollusc in the family Arionidae, the roundback slugs.. An adult Kerry slug generally measures 7–8 cm (2.8–3.2 in) in length and is a dark grey colour with yellowish spots. This is quite unique for a slug. The project is located at the Martin Mere Wetland Centre in Lancashire, England. The albumen gland, which produces albumen for the eggs, is elongated and shaped like a tongue. The Kerry Slug cannot be accused of being a pest as it is only found in the wild landscapes of the south and west. The Kerry slug, a species found in large numbers on the greenway route. Since 1990 the species has been maintained at the Endangered Species Breeding Unit, Martin Mere, under a low‐maintenance husbandry regime. Where the ribs meet the upper edge, they sometimes form crenulations ( a scalloped effect) and may also produce the same effect on the lower edge of the jaw. In Ireland, it also occurs in upland conifer plantations and areas of clear-fell. More recently, the Kerry Slug has been found in Connemara. In the Kerry slug, the radula is 8 mm (5/16 in) long and 2 mm (1/16 in) wide, and has 240 slightly curved, transverse rows of denticles; tiny teeth. Species listed on Annex IV of the EU Habitats Directive include Otter, all of Irelands Bat species, the Natterjack Toad and the Kerry Slug. The Kerry slug (Geomalacus maculosus) is protected by the Wildlife (Amendment) Act 2000. [10] Juveniles reach maturity in two years, at a length about 2.6 cm (1.0 in). [40], This article incorporates public domain text from Taylor (1907). [45] The principal mechanisms used by the Directive to protect habitats and species are the creation of Special Areas of Conservation (SACs) and the protection of species independently of their habitats by other means. [7] The skin mucus is usually pale yellow and varies in viscosity. The only difference between the lateral and marginal series is that the ectocone (extra little side protrusion) present on the admedian teeth recedes in position and slightly diminishes in size in the succeeding teeth up to about the 20th row on the radula. The slug with relatives in Portugal has been found only in Cork and Kerry until recently when it emerged in Connemara and is one of the southwest’s Iberian species. Forested sites were a com-bination of conifer plantations and oak woodlands (Fig. (1846). Given that the slug has thus far been recorded exclusively at locations in Ireland and north-western Iberia, it can be said to tentatively possess a Lusitanian distribution. However more information is needed to determine whether the species can recolonise areas it has become extinct in. [10] This is behaviour is unique among species in Arionidae[11] and among slugs in Ireland. Blackwater River (Kerry) Special Area of Conservation (site code IE002173) Blackwater River (Kerry) Special Area of Conservation is selected for a single habitat listed on Annex I of the Habitats Directive 4030 European dry heaths The site is also selected for the following species listed on Annex II of the same directive: 1024 Geomalacus maculosus Kerry Slug 1029 Margaritifera margaritifera … Typically, it is a small, strong, ribbon-like structure that bears numerous complex rows of tiny teeth across it. [38] The Kerry slug is not considered an agricultural pest,[24] unlike some other slugs in the family Arionidae. The Irish yellow slug (Limacus maculatus) is quite different from the Kerry slug (Geomalacus malaculosus), albeit for its rather similar name.The first is a keel back slug from the Limacidae family, recognizable by the keel at the end of its foot. Kerry slug … Blackwater River (Kerry) Special Area of Conservation (site code IE002173) Blackwater River (Kerry) Special Area of Conservation is selected for a single habitat listed on Annex I of the Habitats Directive 4030 European dry heaths The site is also selected for the following species listed on Annex II of the same directive: 1024 Geomalacus maculosus Kerry Slug 1029 Margaritifera margaritifera … The Kerry Slug loves the humidity and warmth that the south west of Ireland offers it and it lives on the many mosses and lichens found in this part of Ireland. LATEST; TV PROGRAMMES. The Kerry slug will suffer from “unmitigated noise disturbance” and habitat loss in the construction of the 32km South Kerry Greenway, a hearing in Tralee was told today. [10] In 2010, a previously unknown population was recorded further north in County Galway. According to Godwin-Austen, the exterior of the shell plate is covered with a thin, transparent protein layer called the periostracum and with the nucleus—the first part to form—situated near the front. [37] In Ireland, it also occurs in upland conifer plantations and areas of clear-fell. Overgrazing by sheep, pollution, and loss of habitat have threatened it. Since 1990 the species has been maintained at the Endangered Species Breeding Unit, Martin Mere, under a low‐maintenance husbandry regime. [7], The Kerry slug's upper tentacles are smoky-black or grey, short and thick with oval ends, and have eye spots at their tips. [39] The best predictor of its occurrence is high rainfall and high summer temperatures. [7], In the Kerry slug, as in all species within the family Arionidae, the alimentary canal of the digestive system forms two loops.[21]. Free-living slugs were photographed from six sites in Ireland across the western counties of Galway, Kerry and Cork (Fig. The surface texture of this area resembles the underside of undyed leather; it is spotted with pale, buff or light-coloured spots that are similar to those on the body but are more uniformly distributed. The habitat of the Kerry Slug in Ireland is woodland and bogs within the sandstone areas of Kerry and west Cork. However, it has been estimated that these pest species cause… At first glance, the rugged landscapes of the Gap of Dunloe might not seem like the most welcoming habitat for animals, but you would be surprised to know just how rich in wildlife this region is. [6] The English-language common name is derived from County Kerry in the south-west of Ireland, where the type specimens that were used for the formal scientific description were collected. The circulatory and excretory systems of the Kerry slug are closely related; the heart is surrounded by the triangular kidney, which has a lamellate (layered) structure and two ureters. Kerry Slug. [10][23][36] Because Ireland is much further north and has a considerably cooler, wetter and more humid climate, the Kerry slug is sometimes active there in the daytime if the weather is humid and overcast. SI 94/1997 as amended by EC (Natural Habitats) (Amendment) Regulations SI 233/1998 and SI 378/2005. [18] Platts & Speight [18] considered the depiction by Godwin-Austen (1882)[14] to be the most accurate of those by earlier authors; others depicted the atrium too short. Because the Kerry slug, also known as Geomalachus maculosus, is listed in the habitats directive, it is strictly protected from injury, or disturbance or damage to any breeding or resting place wherever it occurs, Kerry County Council ecologists explained. Measures to protect the Kerry Slug, a protected species, have been outlined at the An Bord Pleanála oral hearing into the Kerry Greenway. Sites were selected on the basis that previous surveys had found high numbers of Kerry slugs in these areas [30, 33, 34, 35]. One … National University of Galway is also carrying out research on the diet and genetics of the species. These localities fall within the boundaries of various autonomous communities: Galicia, Asturias, Cantabria, Castile and León (provinces of León, Palencia and Zamora), and the Basque Country provinces of Biscay and Álava. [28] Threats to the Kerry slug will probably be greatest in areas not specifically protected as SACs. More research is being undertaken with NPWS funding on the distribution of Kerry Slug in conifer plantations and the impact of clear felling on these populations. Broadcast on: August 07th, 2018. But as 44 acres of the slug habitat will be lost during construction work, Cork County Council has been ordered to recreate 45 acres of new compensatory habitat in the general area. 0 0. An adult Kerry slug generally measures 7–8 cm (2.8–3.2 in) in length and is dark grey or brownish in colour, with yellowish spots. It is a medium-to-large sized, air-breathing land slug in the family of roundback slugs, Arionidae. There has been speculation that G. maculosus was introduced to Ireland from Iberia by prehistoric humans; a similar introduction appears to have happened with the Eurasian pygmy shrew. [32], Natura 2000 sites for this species in Spain include 48 localities (listed below, grouped by region). [25], The need to improve monitoring was discussed by the NPWS Threat Response Plan of 2010, which recognised that population statistics were still deficient, particularly outside the SACs. The Wildfowl & Wetlands Trust, a British conservation organisation, operates a captive breeding programme in terraria at its "Endangered Species Breeding Unit". An adult Kerry slug generally measures 7–8 cm (2.8–3.2 in) in length and is dark grey or brownish in colour, with yellowish spots. [19] It is presumed that the bursa retractor muscle retracts the atrial diverticulum. In juveniles the shield shows lyre-shaped markings, as is the case in slugs of the genus Arion. The radula, which is located inside the mouth, is a feeding structure that is unique to molluscs. The shell plate is usually convex above and concave beneath and has some indistinct, concentric lines of growth. The locomotory mucus is tenacious and usually colourless but is sometimes yellow because of mixing with body slime. The Kerry slug or Kerry spotted slug (Geomalacus maculosus) is a species of terrestrial, pulmonate, gastropod mollusc. the south-west of Ireland for which the Kerry Slug is the qualifying feature. Slugs, in general, are omnivorous. [7] The sole of the foot is pale grey-yellow and is divided into three indistinct bands; the mid-area is somewhat darker and more transparent than the side bands. As at 2017, some of these sites have yet to be designated as Special Areas of Conservation:[28], The Kerry slug is primarily nocturnal. It is not found in limestone areas. The next year, Allman exhibited them at the Dublin Natural History Society and published a formal description of the new species and genus in the London literary magazine The Athenaeum. 1 day ago. The pit, which collects extra mucus, is not conspicuous, triangular and opens transversely. [40], The eggs are very large compared with the size of the animal. Kerry slug – favourable conservation status but Irish population is important in a global context as the Iberian populations are severely threatened. In 1842, a Dublin-based naturalist William Andrews (1802–1880) sent specimens he had found at Caragh Lake in County Kerry to the Irish biologist George James Allman. Woodlands are dominated by tree cover, with a diverse range of animals and plants, some of which rely entirely on this as a habitat. It is listed under Annex II of the Habitats Directive and seven Special Areas of Conservation (SACs) have been designated for the species with a combined total area of approximately 95,337 hectares. [30], Despite its first discovery at Caragh Lake and its English common name of Kerry slug, Ireland is at the periphery of this slug species' distribution; in terms of genetic diversity the distribution is centred on the north-western parts of the Iberian peninsula. An invertebrate species with a distribution similar to theHiberno-lusitanian plant species is the Kerry slug (Geomalacus maculosus). The subgenus Geomalacus contains only one species, the Kerry slug; three species comprise Arrudia. [7], CS1 maint: multiple names: authors list (. The slug is mostly nocturnal or crepuscular but in Ireland it is active on overcast days. The occurrence of the wind farm within the known range of Kerry Slug (Geomalacus maculosus) together with the presenceof suitable habitat throughout the site suggests the likely presence of the species. Overgrazing by sheep, pollution, and loss of habitat have threatened it. The cephalic (head) gland known as Semper's organ is well developed and shows as two strong, flattened lobes. Revision of the genus, "Checklist of protected & rare species in Ireland", "Wildlife Act, 1976 (Protection of Wild Animals) Regulations, 1990", Department of Agriculture, Fisheries and Food, Kerry Slug Survey of Ireland (Official Website), Distribution and population dynamics of the Kerry Slug, Department of Arts, Heritage and the Gaeltacht, British Association for the Advancement of Science, "EU-protected slug Geomalacus maculosus and sympatric Lehmannia marginata in conifer plantations: what does mark-recapture method reveal about population densities? [19], In Geomalacus maculosus, the atrial diverticulum is longer than the bursa duct; this situation is reversed in Geomalacus anguiformis.[18].
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