Anthoceros neesii

Anthoceros neesii
Systematics
Class :	Anthocerotopsida
Subclass :	Anthocerotidae
Order :	Anthocerotales
Family :	Anthocerotaceae
Genre :	Anthoceros
Type :	Anthoceros neesii
Scientific name
	Anthoceros neesii
	Prosk.

Anthoceros neesii is a species fromthe hornwort class (Anthocerotopsida). It is only known from a few, very small, disjoint areas in Central Europe and is considered to be threatened with extinction.

description

This moss consists of a yellowish-green, fleshy body of vegetation ( thallus ) that reaches a diameter of one centimeter. The horn-shaped capsules are three to seven millimeters long and 0.3 to 0.4 millimeters in diameter. Anthoceros neesii is an annual and monoecious plant. It produces spores that can survive for a few years even without the plant being present at the site.

The spores are covered with about 45 simple, not forked spines, the proximal side of the spores is warty-prickly, the distal side mostly covered with simple spines.

Distribution and Status

Anthoceros neesii is an endangered species that only occurs in 15 locations worldwide in Hesse ( Westerwald and Vogelsberg ) and two locations in Styria in Austria . In the 20th century it also occurred in two locations in the Czech Republic , where it is now extinct. It was found in Poland until the 19th century .

The species is mostly found on stubble fields. Their original habitats are not known; they are probably open locations on clay soils. The species is often associated with Anthoceros agrestis and Notothylas orbicularis .

In Germany the species is listed on the Red List as "Critically Endangered". Their endangerment is mainly due to the monotonous agricultural use of meadows and arable land and the use of pesticides .

Systematics and research history

Anthoceros neesii was first described as a species by Johannes Max Proskauer in 1958 . The new discoveries in Hesse were made by Josef Futschig .

proof

↑ ^a ^b ^c ^d Jíři Váňa and H. Köckinger: Anthoceros neesii Prosk. In: Sveriges Lantbruksuniversitet , European Committee for Conservation of Bryophytes (Ed.): Red Data Sheets , as of October 2001 ( PDF Online ).
↑ ^a ^b Jan-Peter Frahm : Illustrated key for the thallous liverworts in Germany (= Archive for Bryology. Special Volume 2, ISSN 0945-3466 ). University of Bonn, Bryology Group, Bonn 2011 ( online PDF; 1.12 MB ).
↑ ^a ^b Entry on Anthoceros neesii on Mosses from Germany , accessed on 23 August 2010.
^ Jan-Peter Frahm, Jens Eggers: Lexicon of German-speaking bryologists. Supplementary volume. Self-published by the authors, Bonn 2005, ISBN 3-8311-0986-9 , pp. 121–123.

Web links

Photo by Jan-Peter Frahm on bryologie.uni-bonn.de: Anthoceros neesii ( Memento from July 17, 2007 in the Internet Archive )
Anthoceros neesii in the endangered Red List species the IUCN 2010. Posted by: Bryophyte Specialist Group, 2000. Accessed August 23 of 2010.

[eccb-1] Jíři Váňa and H. Köckinger: Anthoceros neesii Prosk. In: Sveriges Lantbruksuniversitet , European Committee for Conservation of Bryophytes (Ed.): Red Data Sheets , as of October 2001 ( PDF Online ).

[jan-2] Jan-Peter Frahm : Illustrated key for the thallous liverworts in Germany (= Archive for Bryology. Special Volume 2, ISSN 0945-3466 ). University of Bonn, Bryology Group, Bonn 2011 ( online PDF; 1.12 MB ).

[md-3] Entry on Anthoceros neesii on Mosses from Germany , accessed on 23 August 2010.

[lex-4] Jan-Peter Frahm, Jens Eggers: Lexicon of German-speaking bryologists. Supplementary volume. Self-published by the authors, Bonn 2005, ISBN 3-8311-0986-9 , pp. 121–123.