Calumma nasutum

Calumma nasutum
Calumma nasutum, Andasibe, 2014 (1)
Calumma nasutum, Anlamazaotra, female, 2014 (1)
Calumma nasutum
Calumma nasutum
Calumma nasutum Andasibe
CITES quotas
2011-13 no specimens, 2014-16 each 1000 specimens, 2017 for the first time 2000, 2018-2022 each 1000 specimens for legal export

First description:

(Duméril & Bibron, 1836)

Origin of the species name:

The zoologist André Marie Constant Duméril, then head of herpetology at the Natural History Museum of Paris (France), together with his assistant Gabriel Bibron, named this chameleon species after its conspicuous nose.

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Calumma nasutum

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Analamazaotra: -18.933811, 48.431683
Maromizaha: -18.966526, 48.478374
Mitsinjo: -18.916030, 48.436661
Mantadia: -18.813368, 48.478546
Tarzanville: -19.180841, 48.218651
Sorata Massif: -13.669762, 49.409637
Vohidrazana: -18.992661, 48.519745

Distribution:

The distribution range of Calumma nasutum is mainly restricted to the region around the Andasibe-Mantadia National Park in the eastern highlands of Madagascar. Since the 2020 revision (see “Good to know”), it is clear that the species is significantly rarer than Calumma emelinae, which also occurs in this area. Especially the females of Calumma nasutum are often confused with Calumma emelinae. A second population of Calumma nasutum occurs in northern Madagascar in the Sorata Massif. This area is largely inaccessible for travelers, so that there are hardly any finding reports from there.

Look and size:

Calumma nasutum is one of the small chameleons and with a total body length of eight to ten centimeters, it is a real midget. The animals have a round, elastic rostral appendage, which is more pronounced in the males. The rostral scale directly below the nose is not integrated into the rostral appendage itself. The temporal crest consists of only one tubercle. Whether males show a dorsal crest or not varies within the species. A striking feature of males of Calumma nasutum is the high casque (1.5-2 mm), which is very similar to that of Calumma fallax. The scales on arms and legs are slightly larger than those on the body, and the coloration of the males is mainly limited to beige on the body and light green on the head, arms, and legs. The females are a little more inexpressibly light beige. When excited, Calumma nasutum can show slightly visible turquoise-blue bands on the body.

Good to know:

Calumma nasutum is the name-giving chameleon species of the so-called nasutum group. This group includes a large number of small chameleons from Madagascar with a soft rostral appendage. It was not until 2020 that Prötzel, Scherz et al. defined Calumma nasutum in more detail so that its distribution and appearance are determined as described here. Most of the animals described as Calumma nasutum all over Madagascar until 2020 now belong to Calumma radamanus and the radamanus group of the same name. The latter still contains many undescribed species. Due to years of lack of genetic differentiation of different species, countless chameleons have been exported under the name Calumma nasutum since 2014. Most are not Calumma nasutum at all, but other chameleon species.

 

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature 23 24 23 23 22 19 19 19 20 21 22 23
Minimum temperature20 20 20 19 18 15 15 15 15 16 18 19
Maximum temperature 27 27 27 27 25 23 23 23 24 25 26 27
Rain days 27 24 19 17 18 21 20 15 16 20 25

We have collected the data given above over several years with thermometers and hygrometers at the finding places of the chameleons. "Average temperature" means that values of a whole month have been calculated to one average value per month. For example all measured minimum temperature values of February have been calculated to one average minimum temperature for February. In plain language, this means single peak values of a day may be a little higher or lower than the average minimum and maximum temperatures. It is possible that a location has an average maximum temperature of 29°C, but one day during that month it had 33°C or even 35°C there.

The region around Andasibe with the belonging forests Mantadia and Analamazaotra is located in Madagascar's eastern highlands at elevations between 900 and 1250 m above sea level. Thus temperatures sometimes reach temperatures above 25°C, but thermometers rarely climbs above 30°C or only in sunny places. At night, temperatures always drop to 10° to 15°C.

Humidity in Andasibe's rainforest is high all year long. During rainy season, it rains intensively every day, sometimes rain even lasts for days. But also dry season does not differ much besides the fact of cooler temperatures. It still rains at least every other day, in most years more often. Rain, humidity and temperature drop at night are the key features of the region around Andasibe.

2014 UVI Andasibe 2016 UVI Andasibe
Tageszeit = day time, Sonne = sun, Halbschatten = half shade, Schatten = shade

We have measured UVB data with a Solarmeter 6.5 in spring (March, April) at the peak of activity of chameleons in Madagascar. We always measured the values that a chameleon could maximally reach in its habitat.

Unfortunately, we have no ground temperatures for the region of Andasibe available yet.

Habitat:

The following photos show parts of the habitat of Calumma nasutum in Andasibe, Analamazaotra and Maromizaha. They inhabit thin trees, shrubs and bushes, but also thick lianas in the dense rainforest. Only very rarely they are found in open terrain, they prefer dense foliage and deep rainforest.

Below you will find some 360° pictures from Analamazaotra. With the mouse, you can turn in all directions. If you click on the Theta logo, the pictures will open in a separate window in an enlarged view. There you also have the possibility to view the pictures in full-screen mode. Have fun watching it!

Regenwald im Nationalpark Andasibe-Mantadia, Region Alaotra-Mangoro, Madagaskar, April 2018 – Spherical Image – RICOH THETA

 

Regenwald im Nationalpark Andasibe-Mantadia, Region Alaotra-Mangoro, Madagaskar, April 2018 – Spherical Image – RICOH THETA

 

Regenwald im Nationalpark Andasibe-Mantadia, Region Alaotra-Mangoro, Madagaskar, April 2018 – Spherical Image – RICOH THETA

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