''Varanus zugorum'', also known commonly as the silver monitor or Zugs' monitor, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of monitor lizard in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Varanidae The Varanidae are a family of lizards in the superfamily Varanoidea within the Anguimorpha group. The family, a group of carnivorous and frugivorous lizards, includes the living genus '' Varanus'' and a number of extinct genera more closely rel ...

. The species is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to the island of

Halmahera Halmahera, formerly known as Jilolo, Gilolo, or Jailolo, is the largest island in the Maluku Islands. It is part of the North Maluku province of Indonesia, and Sofifi, the capital of the province, is located on the west coast of the island. Ha ...

in the

Moluccas The Maluku Islands (; Indonesian: ''Kepulauan Maluku'') or the Moluccas () are an archipelago in the east of Indonesia. Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located ...

, in

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

Etymology

The specific name, ''zugorum'' (genitive, plural), is in honor of American herpetologist George R. Zug and his wife Patricia. Beolens B, Watkins M, Grayson M (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (''Varanus zugorum'', p. 294).

Geographic range

''V. zugorum'' is only known with certainty from its type locality in the vicinity of

Jailolo Jailolo is a volcanic complex on a peninsula (Jailolo Bay), west of Halmahera island. It has lava flows on the eastern flank, small caldera at the west and south-west of the mountain, hot springs along the north-west coast of the caldera. Small ...

. Reasonably reliable local eyewitness accounts exist from Akesahu (lower western side of Kao Bay) and Labi Labi (northeast Halmahera).

Taxonomy

Zugs' monitor was described from a juvenile museum specimen originally labeled as ''

Varanus indicus The mangrove monitor, mangrove goanna, or Western Pacific monitor lizard (''Varanus indicus'') is a member of the monitor lizard family with a large distribution from northern Australia and New Guinea to the Moluccas and Solomon Islands. It grows ...

''. At least one or two specimens resembling the type specimen and generally agreed to represent this species have been imported at various times for the pet trade. Other than this however, the species is unknown. Its habits are unknown as it has not been observed in the wild and is rarely seen even by natives.

Conservation status

''V. zugorum'' is among the 25 “most wanted lost” species that are the focus of Global Wildlife Conservation's “Search for Lost Species” initiative.

Description

Based on the

holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of sever ...

, a juvenile that measures in snout–vent length and in total length, the background color of ''V. zugorum'' is a silver-greyish. The body and limbs are patternless save for scattered bluish scales. The tail is mostly patternless except for a dozen faint dark bands towards the tip. The underside is yellowish and unpatterned. The tongue is dark purplish with a pink base.

References

{{Taxonbar, from=Q3008013 Varanus Reptiles of Indonesia Endemic fauna of Indonesia Fauna of Halmahera Reptiles described in 2005 Taxa named by Wolfgang Böhme (herpetologist) Taxa named by Thomas Ziegler (zoologist)