Calumma

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Calumma
Calumma crypticum (male)

Calumma crypticum  (male)

Systematics
Order : Scale reptiles (Squamata)
without rank: Toxicofera
without rank: Iguana (Iguania)
Family : Chameleons (Chamaeleonidae)
Subfamily : Real chameleons (Chamaeleoninae)
Genre : Calumma
Scientific name
Calumma
Gray , 1865

Calumma is a genus of chameleons . All species in this genus are endemic to Madagascar .

Appearance

The genus Calumma includes small to large chameleons. These animals have a distinctive coloration and the ability to change color significantly. In Calumma occurs sexual dimorphism on: males have clearly developed structures on the head, which are absent in the females or are at least less pronounced. These are, for example, nasal processes, helmet-like structures and occipital lobes. The latter are skin-like, splayable growths on the side of the skull. Male Calumma also grow larger than female conspecifics, and they have a longer tail than the female with a thickened base.

Outwardly, this genus is difficult to distinguish from Furcifer . In many Calumma occipital lobes are present, in Furcifer not. In Calumma there is also no pronounced crest on the ventral side (rudimentary in C. brevicorne ), but such a ridge often occurs in Furcifer .

Occurrence

The genus Calumma is endemic to Madagascar. The only exception was the species C. tigris , which occurs in the Seychelles , but was placed in the genus Archaius in 2010 . The genus Archaius , already described in 1865, was revived.

These are exclusively arboricolous species that have so far only been detected in humid areas. Calumma occurs up to over 1900  m altitude - another distinguishing feature to Furcifer ; of the species of this genus, only F. campani inhabits these heights. With a few exceptions, Calumma species show a preference for undisturbed forests.

Systematics

Since the generic name Calumma is no longer regarded as female but as a neuter, some name endings have changed.

literature

Individual evidence

  1. Ted M. Townsend, Krystal A. Tolley, Frank Glaw, Wolfgang Böhme , Miguel Vences: Eastward from Africa: palaeocurrent-mediated chameleon dispersal to the Seychelles islands. In: Biology Letters. Vol. 7, No. 2, 2010, pp. 225-228, doi : 10.1098 / rsbl.2010.0701 .
  2. a b c Prötzel et al .: Untangling the trees: Revision of the Calumma nasutum complex (Squamata: Chamaeleonidae) in: Vertebrate Zoology , 70 (1): 23-59. February 2020.
  3. a b c David Prötzel, Oliver Hawlitschek, Mark D. Scherz, Fanomezana M. Ratsoavina and Frank Glaw. 2018. Endangered Beauties: micro-CT Cranial Osteology, Molecular Genetics and External Morphology reveal Three New Species of Chameleons in the Calumma boettgeri complex (Squamata: Chamaeleonidae). Zoological Journal of the Linnean Society. zlx112, DOI: 10.1093 / zoolinnean / zlx112

Web links

Commons : Calumma  - collection of images, videos and audio files