Čumáček a varlata: aneb Co morfologicky spojuje slona se zlatokrtem

Title:

Čumáček a varlata: aneb Co morfologicky spojuje slona se zlatokrtem

Creator:

Robovský, Jan

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:eccf9ddf-8dd2-4609-9f3b-76aad13f654a
uuid:eccf9ddf-8dd2-4609-9f3b-76aad13f654a

Type:

article, model:article, and TEXT

Description:

Snout and testes - what is a morphological support for afrotherian mammals? Afrotheria comprises a newly recognized clade of mammals with strong molecular evidence for its monophyly. Afrotheria including elephants, sea cows, hyraxes, aardvarks, sengis, tenrecs and golden moles has been believed to be without any morphological support. Recent analyses have shown that Afrotheria shares several morphological characters, e.g. testicondy (absence of testicular descent), snout musculature, a large allantois sac divided into four intercommunicating lobes by two pair of septal foles, an increase in the number of thoracolumbar vertebrate and delayed dental eruption. Seiffert (2007) identified even 21 morphological characters shared by Afrotheria. This clade is also supported by several chromosomal characters and some reproductive (e.g. slower reproductionm lower number of mammae) and physiological characters (e.g. lower body temperature) are candidates for an additional non-molecular support. Inssectivore-like morphology in tenrecs and golden mole is probably a secondary state obtained from the ungulate-like morphology present now or in the past in all other afrotherian mammals including sengis (cf. Zack et al. 2005). Afrotheria need not have an African origin, Africa could be its secondary refuge (Zack et al. 2005).

Language:

Czech

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Vesmír | 2011 Volume:90 (141) | Number:7-8

Harvested from:

CDK

Metadata only:

false