Cibirhiza spiculata (Apocynaceae), a remarkable new species from eastern Ethiopia

• The new species Cibirhiza spiculata Thulin & Goyder, from Acacia-Commiphora bushland on sand in the Somali National Regional State (Ogaden) of Ethiopia, is described and illustrated. Its conservation status has been assessed. A molecular phylogenetic analysis confirms its placement in the tribe Fockeeae and indicates a position of the new species as sister to C. albersiana. The almost obsolete anther appendages, the outer corona with spreading lobes, as well as the pollinia with apparently single pollen grains, also support its placement in Cibirhiza. However, C. spiculata differs markedly from both previously known species of this genus (C. dhofarensis in Oman and Yemen and C. albersiana in Tanzania and Zambia) by its narrowly linear, subsessile leaves and by the inner corona lobes that are curved inwards over the gynostegium and each ending in a spinulose head.

Ämnesord

NATURVETENSKAP  -- Biologi -- Biologisk systematik (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Biological Systematics (hsv//eng)

Nyckelord

Apocynaceae

Asclepiadoideae

Cibirhiza

Ethiopia

Fockeeae

molecular phylogenetics

new species

Ogaden

Systematics and phylogenetics

Systematik och fylogeni

Biologi med inriktning mot systematik

Biology with specialization in Systematics

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)