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HABs taxon detailsOstreopsis fattorussoi Accoroni, Romagnoli & Totti, 2016
1023403 (urn:lsid:marinespecies.org:taxname:1023403)
accepted
Species
marine,
recent only
Accoroni, S.; Romagnoli, T.; Penna, A.; Capellacci, S.; Ciminiello, P.; Dell'Aversano, C.; Tartaglione, L.; Abboud-Abi Saab, M.; Giussani, V.; Asnaghi, V.; Chiantore, M.; Totti, C. (2016). Ostreopsis fattorussoisp. nov. (Dinophyceae), a new benthic toxicOstreopsisspecies from the eastern Mediterranean Sea. <em>Journal of Phycology.</em> 52(6): 1064-1084., available online at https://doi.org/10.1111/jpy.12464 [details] Available for editors
Harmful effect Ostreopsis fattorussoi produces OVTX-a and structural isomers OVTX-d and -e (Accoroni et al. 2016; Tartaglione et al. 2017)....
Harmful effect Ostreopsis fattorussoi produces OVTX-a and structural isomers OVTX-d and -e (Accoroni et al. 2016; Tartaglione et al. 2017). The Lebanese O. fattorussoi did not produce the new palytoxin-like compounds (ovatoxin-i, ovatoxin-j1, ovatoxin-j2, and ovatoxin-k) that were previously found in O. fattorussoi from Cyprus. The toxin content was in the range of 0.28–0.94 pg · cell−1. On the Lebanon coast, O. fattorussoi was recorded throughout the year 2015 (temperature range 18°C–31.5°C), with peaks in June and August. [details] Identification Ostreopsis fattorussoi could quickly be distinguished from the other two Mediterranean species in LM by its round thecal...
Identification Ostreopsis fattorussoi could quickly be distinguished from the other two Mediterranean species in LM by its round thecal pores which are easily visible and appear larger than those in both O. cf. ovata and O. cf. siamensis. Moreover, differently from O. cf. ovata, which shows pores of two size classes (Penna et al. 2005, Kang et al. 2013), pores of only one size class were visible in O. fattorussoi. Another way to distinguish O. fattorussoi from O. cf. ovata is the Po, which is longer in the former. Moreover, the shape of the 6″ plate is different: the 6″/5″ suture length is almost twice as long as 6″/7″ suture length, and the length:width ratio of the plate 6″ is 1.06 0.11 (0.95–1.2), while in O. cf. siamensis and O. cf. ovata is 1.5 0.2 (1.1–2.4) and 1.6 0.2 (1.3–2.1), respectively (David et al. 2013). Moreover, O. fattorussoi is readily distinguishable from the other Ostreopsis species because of some peculiar characteristics of its plate tabulation. (i) in O. fattorussoi the 1' plate lies in the left half of the epitheca and is obliquely orientated giving a characteristic shape to the 6″ plate and the oblique 6″/1' suture. In all other Ostreopsis species, the 1' plate closely occupies the center of the epitheca and is not oblique. (ii) O. fattorussoi is readily identifiable by the curved suture between 1' and 3' which makes plates 1' and 3' approximately hexagonal, while in the other Ostreopsis species they are pentagonal (with the exception of Ostreopsis heptagona which have a quadrangular 3' and a heptagonal 1' plate). In O. fattorussoi, the 2' plate is narrow and almost twice the size of Po, separating the 3' and 3″ plates. This characteristic could be useful to distinguish O. fattorussoi from many of the other Ostreopsis species, as only in O. heptagona and O. labens does plate 2' seem to divide plate 3' from plate 3″. This characteristic may also be present in other Ostreopsis species but just not reported in their morphological descriptions: for example, in the original description of O. ovata, Fukuyo (1981) indicated that this plate does not touch the plate 4″, while this contact was indicated later by Besada et al. (1982). Similarly, O. cf. ovata has been described with (Selina and Orlova 2010, Kang et al. 2013) or without this contact (Escalera et al. 2014). The hypotheca of O. fattorussoi does not show differences with that of O. cf. ovata (see Selina and Orlova 2010, Hoppenrath et al. 2014), although it does differ from the original drawings of O. ovata by Fukuyo (1981) (e.g., the latter has smaller 1'''' plate, a longer 2''''/4‴ suture, a longer and narrower 2‴ plate and a smaller 3‴). The correct identification of Ostreopsis species in field samples based only on morphometric characters is often highly problematic. As the species recorded in Mediterranean Sea until now (O. cf. ovata and O. cf. siamensis) are very similar in shape and size, the DV/AP ratio was proposed as a characteristic for a quick distinction between the two species. Originally a DV/AP ratio of <2 for O. cf. ovata and >4 for O. cf. siamensis was proposed (Penna et al. 2005, Aligizaki and Nikolaidis 2006, Selina and Orlova 2010). The situation is now slightly more complex giving that O. cf. ovata from the northern Adriatic Sea was shown to have a DV/AP ratio slightly higher than 2, ~2.3–2.4 (Monti et al. 2007, Guerrini et al. 2010, Accoroni et al. 2012b). Ostreopsis fattorussoi has a DV/AP ratio of 2.35 ± 0.22 μm so this character is of no use to discriminate between O. fattorussoi and O. cf. ovata. Considering cell size, O. fattorussoi seems to be on average slightly bigger (DV: 60.1 ± [details]
Guiry, M.D. & Guiry, G.M. (2024). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Ostreopsis fattorussoi Accoroni, Romagnoli & Totti, 2016. Accessed through: Lundholm, N.; Churro, C.; Escalera, L.; Fraga, S.; Hoppenrath, M.; Iwataki, M.; Larsen, J.; Mertens, K.; Moestrup, Ø.; Murray, S.; Tillmann, U.; Zingone, A. (Eds) (2009 onwards) IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae at: https://www.marinespecies.org/hab/aphia.php?p=taxdetails&id=1023403 on 2024-05-07
Lundholm, N.; Churro, C.; Escalera, L.; Fraga, S.; Hoppenrath, M.; Iwataki, M.; Larsen, J.; Mertens, K.; Moestrup, Ø.; Murray, S.; Tillmann, U.; Zingone, A. (Eds) (2009 onwards). IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae. Ostreopsis fattorussoi Accoroni, Romagnoli & Totti, 2016. Accessed at: https://www.marinespecies.org/hab/aphia.php?p=taxdetails&id=1023403 on 2024-05-07
Date action by
original description
Accoroni, S.; Romagnoli, T.; Penna, A.; Capellacci, S.; Ciminiello, P.; Dell'Aversano, C.; Tartaglione, L.; Abboud-Abi Saab, M.; Giussani, V.; Asnaghi, V.; Chiantore, M.; Totti, C. (2016). Ostreopsis fattorussoisp. nov. (Dinophyceae), a new benthic toxicOstreopsisspecies from the eastern Mediterranean Sea. <em>Journal of Phycology.</em> 52(6): 1064-1084., available online at https://doi.org/10.1111/jpy.12464 [details] Available for editors
 Present Inaccurate Introduced: alien Containing type locality
From regional or thematic species database
Description Cells are ovate in shape and ventrally pointed with a DV of 42.5–72.5 μm, AP of 20–32.5 μm and W 26.3–50 μm. The thecal plate formula is Po, 3', 7″, 6c, 7s, 5‴, 2''''. Thecal plates are smooth with evenly distributed same-sized round pores. The apex is strongly eccentric, located on the left dorsal side of the epitheca. The apical pore plate Po is 10–12.5 μm long and slightly curved. Plate 1' is heptagonal, oblique, and is almost entirely in the left half of the epitheca. Plate 3' is hexagonal, almost entirely in the left half of the epitheca. The pentagonal 6″ has the 6″/5″ suture length almost twice as long as the 6″/7″ suture length. The narrow sulcal groove runs obliquely from the left side of the ventral area into the hypotheca. Cells are photosynthetic. The nucleus has a slightly elongated (subspherical) shape positioned obliquely and occupies the dorsal part of the cell. The species is toxic producing ovatoxins. [details]Harmful effect Ostreopsis fattorussoi produces OVTX-a and structural isomers OVTX-d and -e (Accoroni et al. 2016; Tartaglione et al. 2017). The Lebanese O. fattorussoi did not produce the new palytoxin-like compounds (ovatoxin-i, ovatoxin-j1, ovatoxin-j2, and ovatoxin-k) that were previously found in O. fattorussoi from Cyprus. The toxin content was in the range of 0.28–0.94 pg · cell−1. On the Lebanon coast, O. fattorussoi was recorded throughout the year 2015 (temperature range 18°C–31.5°C), with peaks in June and August. [details] Identification Ostreopsis fattorussoi could quickly be distinguished from the other two Mediterranean species in LM by its round thecal pores which are easily visible and appear larger than those in both O. cf. ovata and O. cf. siamensis. Moreover, differently from O. cf. ovata, which shows pores of two size classes (Penna et al. 2005, Kang et al. 2013), pores of only one size class were visible in O. fattorussoi. Another way to distinguish O. fattorussoi from O. cf. ovata is the Po, which is longer in the former. Moreover, the shape of the 6″ plate is different: the 6″/5″ suture length is almost twice as long as 6″/7″ suture length, and the length:width ratio of the plate 6″ is 1.06 0.11 (0.95–1.2), while in O. cf. siamensis and O. cf. ovata is 1.5 0.2 (1.1–2.4) and 1.6 0.2 (1.3–2.1), respectively (David et al. 2013). Moreover, O. fattorussoi is readily distinguishable from the other Ostreopsis species because of some peculiar characteristics of its plate tabulation. (i) in O. fattorussoi the 1' plate lies in the left half of the epitheca and is obliquely orientated giving a characteristic shape to the 6″ plate and the oblique 6″/1' suture. In all other Ostreopsis species, the 1' plate closely occupies the center of the epitheca and is not oblique. (ii) O. fattorussoi is readily identifiable by the curved suture between 1' and 3' which makes plates 1' and 3' approximately hexagonal, while in the other Ostreopsis species they are pentagonal (with the exception of Ostreopsis heptagona which have a quadrangular 3' and a heptagonal 1' plate). In O. fattorussoi, the 2' plate is narrow and almost twice the size of Po, separating the 3' and 3″ plates. This characteristic could be useful to distinguish O. fattorussoi from many of the other Ostreopsis species, as only in O. heptagona and O. labens does plate 2' seem to divide plate 3' from plate 3″. This characteristic may also be present in other Ostreopsis species but just not reported in their morphological descriptions: for example, in the original description of O. ovata, Fukuyo (1981) indicated that this plate does not touch the plate 4″, while this contact was indicated later by Besada et al. (1982). Similarly, O. cf. ovata has been described with (Selina and Orlova 2010, Kang et al. 2013) or without this contact (Escalera et al. 2014). The hypotheca of O. fattorussoi does not show differences with that of O. cf. ovata (see Selina and Orlova 2010, Hoppenrath et al. 2014), although it does differ from the original drawings of O. ovata by Fukuyo (1981) (e.g., the latter has smaller 1'''' plate, a longer 2''''/4‴ suture, a longer and narrower 2‴ plate and a smaller 3‴). The correct identification of Ostreopsis species in field samples based only on morphometric characters is often highly problematic. As the species recorded in Mediterranean Sea until now (O. cf. ovata and O. cf. siamensis) are very similar in shape and size, the DV/AP ratio was proposed as a characteristic for a quick distinction between the two species. Originally a DV/AP ratio of <2 for O. cf. ovata and >4 for O. cf. siamensis was proposed (Penna et al. 2005, Aligizaki and Nikolaidis 2006, Selina and Orlova 2010). The situation is now slightly more complex giving that O. cf. ovata from the northern Adriatic Sea was shown to have a DV/AP ratio slightly higher than 2, ~2.3–2.4 (Monti et al. 2007, Guerrini et al. 2010, Accoroni et al. 2012b). Ostreopsis fattorussoi has a DV/AP ratio of 2.35 ± 0.22 μm so this character is of no use to discriminate between O. fattorussoi and O. cf. ovata. Considering cell size, O. fattorussoi seems to be on average slightly bigger (DV: 60.1 ± [details] |
