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<document id="F69BAE7E313F6B75E7D64E84EEDB78A8" ID-DOI="10.11646/phytotaxa.385.2.2" ID-ISSN="1179-3163" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725674933826" checkinUser="felipe" docAuthor="Richards, Joseph L., Gabrielson, Paul W. &amp; Schneider, Craig W." docDate="2018" docId="A21674381147FFB621F5FADDFB2BD444" docLanguage="en" docName="phytotaxa.385.2.2.pdf" docOrigin="Phytotaxa 385 (2)" docSource="http://dx.doi.org/10.11646/phytotaxa.385.2.2" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Sporolithon mesophoticum J. Richards, P. W. Gabrielson &amp; C. W. Schneider 2018, sp. nov." docType="treatment" docVersion="1" lastPageNumber="73" masterDocId="5E2F0C401141FFB0217DFFDFFF86DC60" masterDocTitle="Sporolithon mesophoticum sp. nov. (Sporolithales, Rhodophyta) from Plantagenet Bank off Bermuda at a depth of 178 m" masterLastPageNumber="76" masterPageNumber="67" pageNumber="73" updateTime="1725687012766" updateUser="GgImagineBatch" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="7CE2CB4D7523DF772C569E6F9254015D">Sporolithon mesophoticum sp. nov. (Sporolithales, Rhodophyta) from Plantagenet Bank off Bermuda at a depth of 178 m</mods:title>
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@ -66,7 +67,7 @@ J.Richards, P.W.Gabrielson &amp; C.W.Schneider
<taxonomicNameLabel id="03F8A4471147FFB622ACFADBFBA0D97D" box="[977,1062,1284,1309]" pageId="6" pageNumber="73" rank="species">sp. nov.</taxonomicNameLabel>
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(
<figureCitation id="B284D9AB1147FFB62549FADBFB4FD97D" box="[1076,1225,1284,1309]" captionStart-0="FIGURES 28" captionStart-1="FIGURES 912" captionStartId-0="5.[136,243,1841,1862]" captionStartId-1="6.[136,243,1109,1130]" captionTargetBox-0="[215,1372,198,1816]" captionTargetBox-1="[151,1436,186,1086]" captionTargetId-0="figure-14@5.[215,1372,190,1816]" captionTargetId-1="figure-15@6.[151,1436,175,1086]" captionTargetPageId-0="5" captionTargetPageId-1="6" captionText-0="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." captionText-1="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." pageId="6" pageNumber="73">Figures 212</figureCitation>
<figureCitation id="B284D9AB1147FFB62549FADBFB4FD97D" box="[1076,1225,1284,1309]" captionStart-0="FIGURES 28" captionStart-1="FIGURES 912" captionStartId-0="5.[136,243,1841,1862]" captionStartId-1="6.[136,243,1109,1130]" captionTargetBox-0="[215,1372,198,1816]" captionTargetBox-1="[151,1436,186,1086]" captionTargetId-0="figure-14@5.[215,1372,190,1816]" captionTargetId-1="figure-15@6.[151,1436,175,1086]" captionTargetPageId-0="5" captionTargetPageId-1="6" captionText-0="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." captionText-1="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." figureDoi-0="http://doi.org/10.5281/zenodo.13725905" figureDoi-1="http://doi.org/10.5281/zenodo.13725907" httpUri-0="https://zenodo.org/record/13725905/files/figure.png" httpUri-1="https://zenodo.org/record/13725907/files/figure.png" pageId="6" pageNumber="73">Figures 212</figureCitation>
)
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@ -131,23 +132,23 @@ specimen was collected.
<paragraph id="2A00C52E1147FFB621C0FA24FA9ADBBE" blockId="6.[136,1452,1355,2084]" pageId="6" pageNumber="73">
<emphasis id="18CB193C1147FFB621C0FA24FEC7DA74" box="[189,321,1531,1556]" italics="true" pageId="6" pageNumber="73">Description</emphasis>
: Thallus non-geniculate, forming a nucleated rhodolith with a thin crust (120150 μm) growing over a core of consolidated sedimentary material and fragments of invertebrate organisms, putatively identified as bryozoans (
<figureCitation id="B284D9AB1147FFB62073F99DFEFFDA3B" box="[270,377,1602,1627]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Figs 24</figureCitation>
<figureCitation id="B284D9AB1147FFB62073F99DFEFFDA3B" box="[270,377,1602,1627]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Figs 24</figureCitation>
), found growing in a mesophotic benthic habitat. Thallus construction monomerous, with a weakly developed hypothallium (
<figureCitation id="B284D9AB1147FFB6237EF9BAFDEADA1E" box="[515,620,1637,1662]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Figs 45</figureCitation>
<figureCitation id="B284D9AB1147FFB6237EF9BAFDEADA1E" box="[515,620,1637,1662]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Figs 45</figureCitation>
). Hypothallial cells rectangular in shape, 1419 μm long x 58 μm wide (n=4). In some locations two superimposed layers of thalli were observed, though extensive layering was not observed. Adjacent hypothallial and perithallial cells linked by cell fusions (
<figureCitation id="B284D9AB1147FFB62219F974FC21DAA4" box="[868,935,1707,1732]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Fig. 6</figureCitation>
<figureCitation id="B284D9AB1147FFB62219F974FC21DAA4" box="[868,935,1707,1732]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Fig. 6</figureCitation>
); secondary pit connections not observed. The upper perithallium was comprised of layers of wide, flattened cells, 3.15.1 μm long x 10.616.4 μm wide (
<figureCitation id="B284D9AB1147FFB62444F911FA18DA87" box="[1337,1438,1742,1767]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Figs 78</figureCitation>
<figureCitation id="B284D9AB1147FFB62444F911FA18DA87" box="[1337,1438,1742,1767]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Figs 78</figureCitation>
). Meristematic cells also appeared wide and flattened, 2.56.1 μm long x 10.517.8 μm wide (
<figureCitation id="B284D9AB1147FFB625D6F92DFA94DB6B" box="[1195,1298,1778,1803]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Figs 78</figureCitation>
<figureCitation id="B284D9AB1147FFB625D6F92DFA94DB6B" box="[1195,1298,1778,1803]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Figs 78</figureCitation>
). Epithallium (
<figureCitation id="B284D9AB1147FFB621EDF8CAFF71DB4E" box="[144,247,1813,1838]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Figs 78</figureCitation>
<figureCitation id="B284D9AB1147FFB621EDF8CAFF71DB4E" box="[144,247,1813,1838]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Figs 78</figureCitation>
) a single layer of armored epithallial cells that are and very flattened, with thick, heavily calcified cell walls and a small round or slightly trapezoidal shaped lumen, 1.22.0 μm long x 4.87.0 μm wide (n=7) (
<figureCitation id="B284D9AB1147FFB6241DF8E7FA19DB31" box="[1376,1439,1848,1873]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." pageId="6" pageNumber="73">Fig.8</figureCitation>
<figureCitation id="B284D9AB1147FFB6241DF8E7FA19DB31" box="[1376,1439,1848,1873]" captionStart="FIGURES 28" captionStartId="5.[136,243,1841,1862]" captionTargetBox="[215,1372,198,1816]" captionTargetId="figure-14@5.[215,1372,190,1816]" captionTargetPageId="5" captionText="FIGURES 28. Sporolithon mesophoticum Holotype, NCU 658543. 2. Habit of holotype. Scale bar = 3 cm. 3. Fracture of rhodolith showing sedimentary composition of nodule below S. mesophoticum crust. Scale bar = 0.8 mm. 4. Partial surface and section view of thallus (brackets) over substratum consisting of sedimentary material including remains of invertebrate organisms (arrows). Scale bar = 138 μm. 5. Vertical fracture of thallus showing monomerous construction. Scale bar = 60 μm. 6. Cell fusion (arrow). Scale bar = 13.8 μm. 7. Section and partial surface view showing epithallial cell (arrow), meristematic cell (*), and layers of short, flattened perithallial cells (P). Scale bar = 9.2 μm. 8. Surface and section view of epithallial cell (bracket, arrow), and section views of putative meristematic cell (*) and perithallial cell (P). Scale bar = 6.3 μm." figureDoi="http://doi.org/10.5281/zenodo.13725905" httpUri="https://zenodo.org/record/13725905/files/figure.png" pageId="6" pageNumber="73">Fig.8</figureCitation>
). Tetrasporangial sori observed from surface view were flush to slightly raised above the thallus surface and showed tetrasporangial pores surrounded by 1014 rosette cells (
<figureCitation id="B284D9AB1147FFB62279F8A1FCFFDBF7" box="[772,889,1918,1943]" captionStart="FIGURES 912" captionStartId="6.[136,243,1109,1130]" captionTargetBox="[151,1436,186,1086]" captionTargetId="figure-15@6.[151,1436,175,1086]" captionTargetPageId="6" captionText="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." pageId="6" pageNumber="73">Figs 912</figureCitation>
<figureCitation id="B284D9AB1147FFB62279F8A1FCFFDBF7" box="[772,889,1918,1943]" captionStart="FIGURES 912" captionStartId="6.[136,243,1109,1130]" captionTargetBox="[151,1436,186,1086]" captionTargetId="figure-15@6.[151,1436,175,1086]" captionTargetPageId="6" captionText="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." figureDoi="http://doi.org/10.5281/zenodo.13725907" httpUri="https://zenodo.org/record/13725907/files/figure.png" pageId="6" pageNumber="73">Figs 912</figureCitation>
). No evidence of sloughing of tetrasporangial sori was shown, though no buried tetrasporangial compartments were observed in section views. Surface views of a sorus where upper cell layers were removed show compactly arranged tetrasporangial compartments (
<figureCitation id="B284D9AB1147FFB625C1F81AFA88DBBE" box="[1212,1294,1989,2014]" captionStart="FIGURES 912" captionStartId="6.[136,243,1109,1130]" captionTargetBox="[151,1436,186,1086]" captionTargetId="figure-15@6.[151,1436,175,1086]" captionTargetPageId="6" captionText="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." pageId="6" pageNumber="73">Fig. 11</figureCitation>
<figureCitation id="B284D9AB1147FFB625C1F81AFA88DBBE" box="[1212,1294,1989,2014]" captionStart="FIGURES 912" captionStartId="6.[136,243,1109,1130]" captionTargetBox="[151,1436,186,1086]" captionTargetId="figure-15@6.[151,1436,175,1086]" captionTargetPageId="6" captionText="FIGURES 912. Sporolithon mesophoticum Holotype, NCU 658543. 9. Surface view of tetrasporangial sori (arrows). Scale bar = 0.1 cm. 10. Surface view of tetrasprangial sorus with pores (arrows). Scale bar = 258 μm. 11. Surface view of tetrasprangial sorus with pores (arrows) including portion where upper cell layers were removed (bracket) showing top-down view of tetrasporangial compartments (stars). Scale bar = 164 μm. 12. Surface view of a tetrasporangial pore (*) with rosette cells (circle pointers). Scale bar = 27 μm." figureDoi="http://doi.org/10.5281/zenodo.13725907" httpUri="https://zenodo.org/record/13725907/files/figure.png" pageId="6" pageNumber="73">Fig. 11</figureCitation>
).
</paragraph>
<paragraph id="2A00C52E1147FFB621C0F837FA9DD461" blockId="6.[136,1452,1355,2084]" box="[189,1307,2024,2049]" pageId="6" pageNumber="73">