<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <TITLE>Collemopsidium foveolatum (images of British lichens)</TITLE> <META NAME="description" CONTENT="Photograph of Collemopsidium foveolatum (lichen)"> <META NAME="keywords" CONTENT="image, images, photograph, lichen, Collemopsidium, Pyrenocollema halodytes, barnacle, Chthamalus"> <META NAME="Author" CONTENT="Alan J. Silverside"> <BODY bgcolor="#000000" background="Icback_dr.jpg" TEXT="#000000" LINK="#3672a4" VLINK="#3672a4"> &nbsp; <center><table border=0 bgcolor="#ffffff" width=1000> <tr><td> <a href="Collema_fuscovirens.html" target="_top"><img src="previous.gif" border=0 alt="Previous page" align=left></a> <a href="Cornicularia_normoerica.html" target="_top"><img src="next.gif" border=0 alt="Next page" align=right></a> <blockquote> <h5 align=center><font color="#b22222" face="arial">&nbsp;<br>lastdragon.org</font></h5> <h2 align=center><font color="#b22222">Images of British Lichens</font></h2> <hr width="50%"> <p><br></p> <center> <p><font size=5><b>Collemopsidium foveolatum</b></font><font size=4> (A.L. Sm.) F. Mohr<br> &nbsp;<br> (= <b>Pyrenocollema halodytes</b> <i>auct</i>., in part)</font></p> <p><br></p> <table width=740 border=0> <tr><td><div align=justify><font face="arial" size=2>Description based on Mohr <i>et al.</i> (2004): thallus immersed; perithecia 0.10&ndash;0.24 mm. diameter, black, flattened to moderately convex, immersed in pits in shells and softer rocks. Common on rocky shores, on chalk, limestone or on shells of molluscs and barnacles, evidently contributing to weakening and erosion of shells as indicated in the photograph below.</p> <p>Refs: Mohr <i>et al.</i> (2004), 528 (photo), 529; Orange (2008), 45 (line illustration); Smith <i>et al.</i> (2009), 359; Dobson (2005), 377 (photo only; text description acknowledged as covering both <i>C.&nbsp;faveolatum</i> and <i>C.&nbsp;halodytes</i>, under <i>Pyrenocollema</i>); Dobson (2011), 162 (photo); Jahns (1983), 260-261 (photo, as <i>Arthopyrenia halodytes</i>); Moberg &amp; Holm&aring;son (1984), 219 (photo, as &quot;<i>Arthropyrenia sublitoralis</i>&quot;); Puntillo (1996), plate 34 (photo, as <i>P.&nbsp;halodytes</i>); Hansen &amp; Anderson (1995), 111 (photo, as <i>P.&nbsp;halodytes</i>).</p> <p>Mohr <i>et al.</i> (2004) presented compelling evidence that the much used name, <i>Pyrenocollema halodytes</i>, included at least three well defined species, differing in morphology and ecology, and clearly demarked by DNA sequencing. The familiar species on shells and barnacles is NOT <i>P.&nbsp;halodytes</i>, and all now belong in the genus <i>Collemopsidium</i>. True <i>Collemopsidium halodytes</i> has a thin, brownish, surface thallus with the perithecia less immersed in the substratum, and occurs generally on base-poor maritime rocks. It is evidently described and illustrated (as <i>Pyrenocollema</i>) in van Herk & Aptroot (2004, 2013), pp. 330-1.</p> <p>Note that <i>C.&nbsp;sublitorale</i>, with much larger, less immersed perithecia, also occurs on shells and barnacles.</p> <p>FGBI: <a href="http://fungi.myspecies.info/all-fungi/collemopsidium-foveolatum" target="_blank">http://fungi.myspecies.info/all-fungi/collemopsidium-foveolatum</a></font></div></td></tr> </table> &nbsp; <table> <tr><td align=center><img src="Collemopsidium_foveolatum_P5126963.jpg" border=1 vspace=5 alt="Collemopsidium foveolatum in shell of acorn barnacle"></td></tr> <tr><td align=center><font face="arial" size=2>In shell of acorn barnacle (? <i>Chthamalus montagui</i>, but badly eroded), Kennedy's Pass, Ayrshire, May 2008</font></td></tr> </table> <p><br></p> <table border=0> <tr><td><a href="Collema_fuscovirens.html" target="_top"><img src="baru6.gif" border=0 alt="Previous page"></a></td> <td width="50">&nbsp;</td> <td><a href="Cornicularia_normoerica.html" target="_top"><img src="baru8.gif" border=0 alt="Next page"></a></td></tr> </table> </center> <p><br></p> <p><hr></p> <center><font face="Arial" size=2> <p><b><a href="index.html" target="_top">Lichens HOME PAGE</a> | <a href="indexP.html" target="_top">Index of Species</a> | <a href="http://www.lastdragon.org/conditions.html" target="_top">Conditions of Use and e-mail contact</a> | <a href="references.html" target="_top">References</a> | <a href="http://www.lastdragon.org/home.html" target="_top">Site Home Page</a></b></p> </font></center> <p><br></p> <font face="Arial" size=2> <p>&copy; A.J. Silverside<br> First uploaded (as <i>Pyrenocollema halodytes</i>), September 2008, revised February 2009, last updated January 2016</p> </font> </blockquote> </td></tr> </table></center> </BODY> </HTML>