Hydrosaurus KAUP, 1828

Segelechsen

BELTERMANN, R. & G. VISSER (1996): Chromosomen als determinatiekenmerk bij Zeilhagedissen (Hydrosaurus)? - Lacerta, 54 (6): 199-202. (1483)

BOSCH, H.A.J. in den (1993): Hydrosaurus-project. – Verslag museumbezoeken, V.S. Intern verslag Diergaarde Blijdorp.

BRAMWELL, C.D. & P.B. FELLGETT (1973): Thermal regulation in sail lizards. - Nature (London), 242 (5394): 203-205.

DENZER, W., CAMPBELL, P.D., MANTHEY, U., GLÄSER-TROBISCH, A. & A. KOCH (2020): Dragons in neglect: Taxonomic revision of the Sulawesi sailfin lizards of the genus Hydrosaurus Kaup, 1828 (Squamata, Agamidae). – Zootaxa, 4747 (2): 275-301.

Currently three different species are recognized within the Southeast Asian agamid genus Hydrosaurus: H. amboinensis (Schlosser, 1768) from Ambon, Seram, Sulawesi and New Guinea, H. pustulatus (Eschscholtz, 1829) from the Philippines and H. weberi Barbour, 1911 from Halmahera and adjacent islands. Historically, two additional species were described from the island of Sulawesi, but were synonymized with H. amboinensis more than a century ago and have been treated as such in most subsequent publications. In order to revise the taxonomy and diversity of these enigmatic agamid lizards, we examined the corresponding type specimens and additional material originating from Sulawesi and compared them to photographs of live specimens from field trips. Due to differences in colour pattern and scalation characters, we resurrect the taxa celebensis Peters, 1872 and microlophus Bleeker, 1860 from the synonymy of H. amboinensis, which in turn is restricted to the central Moluccas and New Guinea. Hence, Sulawesi is currently the only known island within the genus’ range to be inhabited by two different species of sailfin lizards. Our systematic investigation brings the number of recognized species within the genus Hydrosaurus to five.

FISCHER, O. (2020): Wasserdrachen. – Reptilia, Münster, 25 (3): 10-17.

FISCHER, O. (2020): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 1. – Reptilia, Münster, 25 (3): 18-31.

FISCHER, O. (2020): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 2. – Reptilia, Münster, 25 (4): 56-62.

FISCHER, O. (2020): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 3. – Reptilia, Münster, 25 (5): 44-49.

FISCHER, O. (2020): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 4. – Reptilia, Münster, 25 (6): 56-62.

FISCHER, O. (2021): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 5. – Reptilia, Münster, 26 (1): 44-52.

FISCHER, O. (2021): Faszination Segelechsen – Haltung und Vergleich verschiedener Arten der Gattung Hydrosaurus Teil 6: Nachzucht und Aufzucht. – Reptilia, Münster, 26 (2): 44-49.

KREYENBERG, M. (1914): Zur Lebensweise der Segelechse (Hydrosaurus). – Bl. Aquar. Terrararienkunde, 40: 116.

SILER, C.D., LIRA-NORIEGA, A. & R.M. BROWN (2014): Conservation genetics of Australasian sailfin lizards: Flagship species threatened by coastal development and insufficient protected area coverage. – Biol. Cons., 169: 100-108.

Despite rampant coastal development throughout Southeast Asia and the Pacific, studies of conservation genetics and ecology of vulnerable, coastal species are rare. Large bodied vertebrates with highly specialized habitat requirements may be at particular risk of extinction due to habitat degradation and fragmentation, especially if these habitats are naturally patchily distributed, marginal, otherwise geographically limited, or associated in space with high human population densities or heavy anthropogenic disturbance. Particularly telling examples of these conservation challenges are large Australasian reptiles with obligate habitat requirements for lowland, coastal and mangrove forests. Plagued by habitat destruction due to high human densities along coastlines, sprawling rural development, and rapidly developing estuarine fisheries industry, coastal forest reptiles are experiencing rapid declines. And yet studies of population biology, genetics, and habitat requirements of species depending on these environments are few. We undertook the present study in order to take a multifaceted approach to understanding a poignant conservation problem. We identify significant evolutionary units for conservation in large-bodied sailfin lizards (genus Hydrosaurus), model suitable habitat in the Philippines from extensive occurrence data and evaluate the efficacy of the current protected area network, and identify the source of hydrosaurs in the illegal pet trade. We determine that the extent of the species’ habitat coincident with protected areas is low. Our forensic evaluation of the illegal pet trade in the Philippines determines the existence of a natural population that is at risk of systematic exploitation by traders. Together, this integrative study characterizes a conservation urgency of particular significance: the genetically distinct sailfin lizards of the Bicol faunal region, with suitable habitat virtually unprotected, and clear evidence of heavy exploitation for illegal trade. To the best of our knowledge, our study is the first conservation genetic study to evaluate the potential effectiveness of the protected landscape coverage in the Philippines, a Megadiverse nation and Biodiversity Hotspot.

VISSER, G. (1990): Over de soorten zeilhagedissen van het geslacht Hydrosaurus. - Lacerta, 48 (4): 98-102. (1092)

WERNING, H. (2002): Wasseragamen und Segelechsen. – Natur- und Tier-Verlag, Münster. 127 S.

WERNING, H. (2004): Bibliographie der Gattungen Physignathus, Lophognathus und Hydrosaurus. – Iguana-Rundschreiben, 17 (2): 18-31.

Segelechse / Sailfin Lizard

ALTMANN, H. (1980): Erfolgreiche Behandlung der Knochenerweichung bei einer Segelechse. – Die Aquar. Terrar. Z., Stuttgart, 33 (2): 67-70.

BLEEKER, P. (1860): Istiurus microlophus sp. nov. – Natuurkundl. Tijdschr. Nederl. Indie, Batavia, 22: 80.

DENZER, W., CAMPBELL, P.D., MANTHEY, U., GLÄSER-TROBISCH, A. & A. KOCH (2020): Dragons in neglect: Taxonomic revision of the Sulawesi sailfin lizards of the genus Hydrosaurus Kaup, 1828 (Squamata, Agamidae). – Zootaxa, 4747 (2): 275-301.

Currently three different species are recognized within the Southeast Asian agamid genus Hydrosaurus: H. amboinensis (Schlosser, 1768) from Ambon, Seram, Sulawesi and New Guinea, H. pustulatus (Eschscholtz, 1829) from the Philippines and H. weberi Barbour, 1911 from Halmahera and adjacent islands. Historically, two additional species were described from the island of Sulawesi, but were synonymized with H. amboinensis more than a century ago and have been treated as such in most subsequent publications. In order to revise the taxonomy and diversity of these enigmatic agamid lizards, we examined the corresponding type specimens and additional material originating from Sulawesi and compared them to photographs of live specimens from field trips. Due to differences in colour pattern and scalation characters, we resurrect the taxa celebensis Peters, 1872 and microlophus Bleeker, 1860 from the synonymy of H. amboinensis, which in turn is restricted to the central Moluccas and New Guinea. Hence, Sulawesi is currently the only known island within the genus’ range to be inhabited by two different species of sailfin lizards. Our systematic investigation brings the number of recognized species within the genus Hydrosaurus to five.

ESCHSCHOLTZ (1829): Istiurus amboinensis sp. nova. – Zoologischer Atlas, enthaltend Abbildungen und Beschreibungen neuer Thierarten, während des Flottcapitains von Kotzebue zweiter Reise um die Welt, 2: 2.

GLÄSSER-TROBISCH, A. & D. TROBISCH (2020): Begegnungen mit Hydrosaurus & Co. in der Wallacea. Teil 1: Drachen im Reich der Schmetterlinge - Sulawesi. – Sauria, Berlin, 42 (3): 1-25.

GLÄSSER-TROBISCH, A. & D. TROBISCH (2021): Begegnungen mit Hydrosaurus & Co. in der Wallacea Teil 4: Drachen auf der Insel der heiligen Aale – Ambon. – Sauria, Berlin, 43 (4): 31-58.

KOPSTEIN, F. (1924): Tierbilder aus den Molukken. – Wochenschrift für Aquarien- und Terrarienkunde, 21 (34): 716-718.

LEDERER, G. (1929): Lebende Segelechsen im Frankfurter Aquarium. – Blätter für Aquarien- und Terrarienkunde, 40: 116.

LEDERER, G. (1931): Ein weiterer Beitrag zur Ethologie der Segelechse (Hydrosaurus amboinensis Schloss.). – Zoologischer Garten, 4: 277-279.

LEDERER, G. (1935): Einige Bemerkungen über die Segelechse (Hydrosaurus amboinensis Schloss.). – Aquarium, 9: 217-218.

LEDERER, G. (1987): An additional contribution to the ethology of the sail lizard (Hydrosaurus amboinensis Schloss.). – Bull. Chic. Herp. Soc., 22 (9): 152.

PETERS, U. (1974): Segel-Echse, Hydrosaurus amboinensis. - Das Aquarium, 59: 218-220. (1447)

SCHLOSSER (1768): Epistola ad F. DeJean de Lacerta amboinensis: 1-19.

SCHMIDT, R.E. (1977): Plasma cell tumor in an East Indian water lizard (Hydrosaurus amboinensis). – Journal Wildl. Dis., 13 (1): 47-48.

VISSER, G. (1984): Husbandry and reproduction of the Sailtailed Lizard, Hydrosaurus amboinensis (SCHLOSSER, 1768) (Reptilia: Sauria: Agamidae) at Rotterdam Zoo. – Acta Zool. Path. Antverp. 78: 129-148.

VISSER, G. (1988): Verzorging en kweek van de Ambonese zeilhagedis (Hydrosaurus amboinensis). – Lacerta, 46 (4): 54-61, 64. (01.978)

WATKINS-COLWELL, G.J. (1993): Unusual food choice in captive sailfin water dragon (Hydrosaurus amboinensis). – Bull. Chic. Herp. Soc., 28 (10): 212.

WATKINS-COLWELL, G.J. & G. JOHNSTON (1999): Does the water dragon, Physignathus lesueurii (Gray 1831), occur in New Guinea? – Herpetol. Rev., 30 (2): 73-74.

ZWART, P. & J.C. HARSHBARGER (1972): Hmatopietic neoplasms in lizards: report of a typical case in Hydrosaurus amboinensis and a probable case in Varanus salvator. – Int. J. Cancer, 9: 548-553.

Hydrosaurus pustulatus (Eschscholtz, 1829)

Philippinische Segelechse / Philippine Sailfin Lizard

BARBOUR, T. (1911): New lizards and a new toad from the Dutch East Indies, with notes on other species. - Proc. Biol. Soc. Washington 24: 15-22.

BIRKETT, J. & H. McCRACKEN (1990): Osteodystrophy in an Asian Agamid (Hydrosaurus pustulatus). – Herpetofauna, Sydney, 20 (2): 32-36.

DATHE, F. (1989): Hydrosaurus pustulatus (Eschscholtz, 1829) Philippinen-Segelechse. - Aquarien Terrarien, Leipzig, 36 (2): 72. (1426)

ESCHSCHOLTZ, F. (1829): Istiurus pustulatus – In: Zoologischer Atlas, enthaltend Abbildungen und Beschreibungen neuer Thierarten, während des Flottcapitains von Kotzebue zweiter Reise um die Welt, auf der Russisch-Kaiserlichen Kriegsschlupp Predpriaetië in den Jahren 1823–1826. Heft 2. G. Reimer, Berlin: 2-4.

GÁBRIŠ, J. (2003): Zur Haltung von Philippinischen Segelechsen (Hydrosaurus pustulatus). – Draco, Münster, 4 (2): 24-33. (03.108)

Inhalt:
Verworrene Systematik. Hydrosaurus pustulatus. Das Segelechsen-Terrarium. Ernährung. Balz und Paarung. Eiablage und Inkubation. Aufzucht.

GONZALES, R.B. /1974): Behavioral notes on captive sail-tailed lizards (Hydrosaurus pustulatus: Agamidae). – Silliman J., 21: 129-138.

GAULKE, M. (1989): Einige Bemerkungen über die philippinische Segelechse Hydrosaurus pustulatus (ESCHSCHOLTZ, 1829). - herpetofauna, 11 (62): 6-12. (1424)

GAULKE, M. & A.D. DEMEGILLO (2006): Ein Gabelschwanz bei einer Philippinischen Segelechse (Hydrosaurus pustulatus [ESCHSCHOLTZ, 1829]). – Sauria, Berlin, 28 (3): 4.

HARTDEGEN, R. & M.K. BAYLESS (1999): Twinning in lizards. – Herpetol. Rev., 30 (3): 141.

HONEGGER, R.E. (1975): Hydrosaurus pustulatus. – Red Data Book 3, IUCN 9 (2):, F. Code 2.2.4.4.1 V.

KRASULA, K. (1988): Haltung und Zucht der Segelechse Hydrosaurus pustulatus. - herpetofauna, 10 (53): 30-34. (1450)

KRASULA, K. (1989): Pleje og opdraet af sejloglen (Hydrosaurus pustulatus). – Nordisk Herp., Forening, 32 (Juli/August): 197-205.

LEDESMA, M., BROWN, R., SY, E. & E.L. RICO (2009): Hydrosaurus pustulatus. – In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. www.iucnredlist.oirg. – Zugriff am 17. Mai 2011. version 2009

LEDESMA, M., BROWN, E.S. & E.L. RUCO (2007): Hydrosaurus pustulatus. – In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. www.iucnredlist.oirg. – Zugriff am 17. Mai 2011.

SCHULTZ, K. (2020): The Philippine Sailfin Dragon. – Herpetoculture Magazine, (5): 26-31.

WERNING, H. (2008): Wasseragamen und Segelechsen. 3. Auflage. – Natur und Tier-Verlag, Münster. 127 S.

WIEGMANN (1835): Lophura pustulata. – Nova Acta Acad. Caes. Leop. Carol., 17 (1): 207.

WIRTH, M. & F. RIEDEL (2011): Drachen im Aquaterrarium: Haltung und Nachzucht der Philippinischen Segelechse, Hydrosaurus pustulatus. – Draco, Münster, 12 (2): 69-77.

Hydrosaurus weberi BARBOUR,1911

Weber´s Saiifin Lizard

COLWELL, G.J. (1993): Hydrosaurus weberi (Weber´s Sail-Fin Dragon). Morphology. – Herp. Rev., New York, 24 (4): 150.

GLÄSSER-TROBISCH, A. & D. TROBISCH (2020): Begegnungen mit Hydrosaurus & Co. in der Wallacea. Teil 2: Drachen im Duft der Nelken – Ternate und Tidore. – Sauria, Berlin, 42 (4): 3-20.

GLÄSSER-TROBISCH, A. & D. TROBISCH (2021): Begegnungen mit Hydrosaurus & Co. in der Wallacea Teil 3: Drachen im Vogelparadies – Halmahera. – Sauria, Berlin, 43 (3): 23-26.

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