identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
5772B54C4B75BE694CC20E51FB87E308.text	5772B54C4B75BE694CC20E51FB87E308.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Dasya sylviae C. W. Schneid., M. M. Cassidy & G. W. Saunders 2021	<div><p>Dasya sylviae C.W.Schneid., M.M.Cassidy &amp; G.W.Saunders sp. nov.</p><p>Fig. 2</p><p>Diagnosis</p><p>Differing from most species of Dasya by its pronounced pseudodichotomous branching pattern (Fig. 2A– C), and from its most similar congener in habit, D. crouaniana J.Agardh, by its longer pseudolaterals, narrower and shorter tetrasporangial stichidia and axes fully covered with pseudolaterals to barely denuded proximal axes. The new taxon differs from all species of Dasya by its lack of post-sporangial cover cells.</p><p>Etymology</p><p>The species is named after Dr Sylvia A. Earle, pioneering phycologist, scientist and open-water diver, 50 years after she led the first all-female team of aquanauts in Tektite II on the floor of the Caribbean Sea (Earle 1972 a, 1972b).</p><p>Material examined</p><p>Type</p><p>BERMUDA • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-64.65889&amp;materialsCitation.latitude=31.320555" title="Search Plazi for locations around (long -64.65889/lat 31.320555)">Spittal</a>, south of Cooper’s I. off Castle Harbour; 31°19.23333′ N, 64°39.53333′ W; depth 63.8 m; on rhodoliths; 11 Aug. 2016; Schneider &amp; Popolizio 16-21-14; GenBank nos: MW698721 (holotype), MW699769 (isotype); holotype (Fig. 2A): MICH [BDA2031]; isotypes (Fig. 2B–C): Bermuda Natural History Museum, MICH, NY, UNB, US, Herb. CWS [BDA2030].</p><p>Additional material</p><p>BERMUDA • Ledge north northeast of St. George’s I.; 32°28.79600′ N, 64°35.68833′ W; depth 90 m; 28 Jul. 2016; Schneider &amp; Popolizio 16-11-1, ⊕ [BDA1969] • loc. cit.; depth 60 m; 28 Jul. 2016; Schneider &amp; Popolizio 16-11-10 [BDA1982] • loc. cit.; 32°28.96200′ N, 64°35.25183′ W; depth 90 m; 29 Jul. 2016, Schneider &amp; Popolizio 16-12-2 [BDA1992] • Spittal, offshore of Midocean Point; 32°19.20000′ N, 64°39.48333′ W; depth 62.7 m; 3 Aug. 2016; Schneider &amp; Popolizio 16-17-2 [BDA2011].</p><p>Description</p><p>Plants epilithic, erect to 17 cm tall, carmine red, arising from small discoidal holdfasts; indeterminate axes sympodially branched, appearing pseudodichotomously branched throughout, only slightly tapering from base to apex (Fig. 2A–C), 0.3–0.8 mm diam. in median to lower portions and completely corticated by rhizoidal downgrowth (Fig. 2D); indeterminate axes densely covered throughout with determinate, lightly pigmented, monosiphonous dichotomously branched axes (pseudolaterals; Fig. 2E), except in some older plants in the most basal portions; pseudolaterals 1.7–5.5 mm in length, 25–91 cells from base to apex, irregularly dichotomously branched from the first to the seventh cell of the pseudolateral, upper portions unbranched and slightly tapering (Fig. 2E); basal cells of pseudolaterals initially globose to ellipsoid (Fig. 2D), 21–37 µm diam. and 12–30 µm long, then slightly elongating; suprabasal cells 19–32 µm diam. and 8–32 µm long, elongating more centrally, 9–22 um diam. and 27–102 µm long, and reaching greatest lengths distally, 8–19 µm diam. and 32–127 µm long; tetrasporangial stichidia single, borne terminally on 3–7-celled unbranched pseudolaterals (Fig. 2F) or terminating basal dichotomies of pseudolaterals (Fig. 2G), lanceolate to narrowly elliptical in outline (Fig. 2F–G), 73–80 µm diam. and 269–305 µm in length at maturity, composed of 10–12 fertile segments, acropetally producing then releasing sporangia (Fig. 2F–G); sporangia globose, 21–29 µm diam., tetrahedrally divided, 3–5 per fertile segment, sporangia borne on 2-celled whorled branches, post-sporangial cover cells lacking (Fig. 2F); one to two spermatangial stichidia terminating a basal dichotomy on 4–10-celled pedicels (pseudolaterals), narrowly elliptical to lanceolate in outline (Fig. 2H), 46–69 µm diam. and 192–258 µm in length at maturity; carpogonial branches and cystocarps unknown.</p><p>Distribution and habitat</p><p>At present, endemic to mesophotic reefs off Bermuda, western Atlantic Ocean.</p></div>	https://treatment.plazi.org/id/5772B54C4B75BE694CC20E51FB87E308	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Schneider, Craig W.;Cassidy, Margaret M.;Saunders, Gary W.	Schneider, Craig W., Cassidy, Margaret M., Saunders, Gary W. (2021): The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60 - 90 m mesophotic reefs off Bermuda. European Journal of Taxonomy 751: 24-37, DOI: 10.5852/ejt.2021.751.1377, URL: http://dx.doi.org/10.5852/ejt.2021.751.1377
