<i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation
Diatoms are the most numerous of algae and scanning electron microscopy continues to reveal ever-increasing diversity. Two new species of <i>Hyalosira</i> from Florida add new characters distinguishing species in this recently redefined genus: <i>H. ornata</i> sp. nov. from F...
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MDPI AG
2025-06-01
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| Series: | Diversity |
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| Online Access: | https://www.mdpi.com/1424-2818/17/7/448 |
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| author | Christopher S. Lobban |
| author_facet | Christopher S. Lobban |
| author_sort | Christopher S. Lobban |
| collection | DOAJ |
| description | Diatoms are the most numerous of algae and scanning electron microscopy continues to reveal ever-increasing diversity. Two new species of <i>Hyalosira</i> from Florida add new characters distinguishing species in this recently redefined genus: <i>H. ornata</i> sp. nov. from Florida Bay has consistent and elaborate ornamentation on both valves and undulate valve margins; <i>H. sertifera</i> sp. nov., from the Atlantic coast of Key Largo, has a thick, consistent, garland-like ring of cristae on only one valve; the former species has deep septa on all copulae except the valvocopula, the latter shallow septa or none on the copulae. <i>Hyalosira hesperia</i> was also found in the Atlantic sample; this is the first record outside the Mediterranean. The number of species known from SEM is now twelve, including four with septa, a diversity potentially useful in exploring outstanding questions of septum function; a key to these species is appended. |
| format | Article |
| id | doaj-art-6ae82e33dc1347eeb13c4ab71fd7bd3c |
| institution | Kabale University |
| issn | 1424-2818 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj-art-6ae82e33dc1347eeb13c4ab71fd7bd3c2025-08-20T03:58:26ZengMDPI AGDiversity1424-28182025-06-0117744810.3390/d17070448<i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent OrnamentationChristopher S. Lobban0Division of Natural Sciences, University of Guam, Mangilao, GU 96923, USADiatoms are the most numerous of algae and scanning electron microscopy continues to reveal ever-increasing diversity. Two new species of <i>Hyalosira</i> from Florida add new characters distinguishing species in this recently redefined genus: <i>H. ornata</i> sp. nov. from Florida Bay has consistent and elaborate ornamentation on both valves and undulate valve margins; <i>H. sertifera</i> sp. nov., from the Atlantic coast of Key Largo, has a thick, consistent, garland-like ring of cristae on only one valve; the former species has deep septa on all copulae except the valvocopula, the latter shallow septa or none on the copulae. <i>Hyalosira hesperia</i> was also found in the Atlantic sample; this is the first record outside the Mediterranean. The number of species known from SEM is now twelve, including four with septa, a diversity potentially useful in exploring outstanding questions of septum function; a key to these species is appended.https://www.mdpi.com/1424-2818/17/7/448biogeographycristaefunctional morphologyheterovalvymarine benthic diatomsseptate copulae |
| spellingShingle | Christopher S. Lobban <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation Diversity biogeography cristae functional morphology heterovalvy marine benthic diatoms septate copulae |
| title | <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation |
| title_full | <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation |
| title_fullStr | <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation |
| title_full_unstemmed | <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation |
| title_short | <i>Hyalosira</i> (Diatomeae: Grammatophoraceae) from Florida Keys, U.S.A., Including Two New Species with Consistent Ornamentation |
| title_sort | i hyalosira i diatomeae grammatophoraceae from florida keys u s a including two new species with consistent ornamentation |
| topic | biogeography cristae functional morphology heterovalvy marine benthic diatoms septate copulae |
| url | https://www.mdpi.com/1424-2818/17/7/448 |
| work_keys_str_mv | AT christopherslobban ihyalosiraidiatomeaegrammatophoraceaefromfloridakeysusaincludingtwonewspecieswithconsistentornamentation |