Thai National Parks

Species of Thailand

Boulenger's tree dragon

Acanthosaura crucigera

George Albert Boulenger , 1885

In Thai: กิ้งก่าเขาหนามสั้น

Acanthosaura crucigera () is a species of lizard commonly known as the masked spiny lizard , Boulenger's pricklenape, or masked horned tree lizard. They are found in Myanmar, Thailand, Peninsular Malaysia, and Cambodia.

They have a distinct diamond-shaped black mark on the upper side of the neck and measure about 25 cm in total, snout to tip of the tail.

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Site notes

In the recent years A. cardamomensis and A. phuketensis got split from A. crucigera.

Scientific classification

Acanthosaura crucigera

Common names

  • German:
    • Masken-Nackenstachler
    • Winkelkopfagame
  • English:
    • Boulenger's tree dragon
    • Boulenger's pricklenape
    • Masked horned tree lizard
  • Thai: กิ้งก่าเขาหนามสั้น


  • Acanthosaura crucigera, Larry Lee Grismer & Evan S. H. Quah (2019)
  • Acanthosaura crucigera, Perry L. Wood Jr et al. (2010)
  • Acanthosaura cf. crucigera, Larry Lee Grismer et al. (2008)
  • Acanthosaura cf. crucigera, Tanya Chan-Ard et al. (1999)
  • Acanthosaura crucigera, Merel J. Cox et al. (1998)
  • Acanthosaura crucigera, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Acanthosaura crucigera, Heinz Wermuth (1967)
  • Acanthosaura crucigera, Edward Harrison Taylor (1963)
  • Goniocephalus armatus crucigerus, Malcolm Arthur Smith (1935)
  • Acanthosaura horrescens, Axel Johan Einar Lönnberg (1916)

Conservation status

Least Concern (IUCN 3.1)

Least Concern (IUCN 3.1)


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Acanthosaura crucigera - Kui Buri National Park
Acanthosaura crucigera
Acanthosaura crucigera
Acanthosaura crucigera (subadult)
Boulenger's pricklenape
Masked horned tree lizard

Range Map

Distribution map of Boulenger's tree dragon, Acanthosaura crucigera in Thailand
  • Erawan National Park
  • Huai Kha Khaeng Wildlife Sanctuary
  • Kaeng Krachan District, Phetchaburi
  • Kaeng Krachan National Park
  • Kui Buri National Park
  • Nam Nao National Park
  • Phu Khiao Wildlife Sanctuary
  • Sai Yok National Park
  • Taksin Maharat National Park
  • Tha Song Yang District, Tak
  • Thong Pha Phum National Park
  • Thung Salaeng Luang National Park
  • Thung Yai Naresuan Wildlife Sanctuary
  • Umphang Wildlife Sanctuary
Range map of Acanthosaura crucigera in Thailand