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HABs taxon details

Azadinium poporum Tillmann & Elbrächter, 2011

624513  (urn:lsid:marinespecies.org:taxname:624513)

accepted
Species
marine
Tillmann, U., Elbrächter, M., John, U. & Krock, B. 2011. A new non-toxic species in the dinoflagellate genus <i>Azadinium</i>: <I>A. poporum</i> sp. nov. Eur. J. Phycol. 46, 74-87 [details]   
Note North Sea along the Danish coast.  
From regional or thematic species database
Type locality North Sea along the Danish coast. [details]
Distribution A. poporum has presently been found in European (North Sea) and East Asian (Korea, China) waters, but probably occurs...  
Distribution A. poporum has presently been found in European (North Sea) and East Asian (Korea, China) waters, but probably occurs worldwide (Gu et al. 2013). [details]

Harmful effect A.poporum produces azaspiracid toxins, causing AZP (azaspiracid shellfish poisoning) the European strains were originally...  
Harmful effect A.poporum produces azaspiracid toxins, causing AZP (azaspiracid shellfish poisoning) the European strains were originally reported top be non-toxic, bit a new type of azaspiracid was subesquently found in both European and Asian strains (Krock et al. 2012). Chinese strains may form 0-3 different types of AZA, including toxic AZA-2 (Gu et al. 2013. AZA-2 was found in sponges in the Sea of Japan (Ueoka et al. 2009),indicating that AZAs can be expected to accumulate not only in mussels but also in other marine animals. Presently no poisonings have been reported. [details]

Identification Differs from Azadinium spinosum in the absence of an antapical spine. Distinguished from both A. spinosum and A. obesum in...  
Identification Differs from Azadinium spinosum in the absence of an antapical spine. Distinguished from both A. spinosum and A. obesum in the conspicuous location of the ventral pore, which for A. poporum is located within the apical pore complex. In contrast to A. spinosum (one pyrenoid) and A. obesum (no pyrenoids), there may be several pyrenoids (up to four) visible in the light microscope. The Kofoidian plate tabulation is: Po, cp, X, 4', 3a, 6'', 6C, 5?S, 6''', 2''''. Cell length is about 11–16 μm, cell width about 8–12 μm.
 [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). Azadinium poporum Tillmann & Elbrächter, 2011. 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=624513 on 2024-03-28
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. Azadinium poporum Tillmann & Elbrächter, 2011. Accessed at: https://www.marinespecies.org/hab/aphia.php?p=taxdetails&id=624513 on 2024-03-28
Date
action
by
2012-09-03 10:56:51Z
created
2013-04-22 12:44:02Z
changed
2015-06-26 12:00:51Z
changed

original description Tillmann, U., Elbrächter, M., John, U. & Krock, B. 2011. A new non-toxic species in the dinoflagellate genus <i>Azadinium</i>: <I>A. poporum</i> sp. nov. Eur. J. Phycol. 46, 74-87 [details]   

basis of record Guiry, M.D. & Guiry, G.M. (2023). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> searched on YYYY-MM-DD., available online at http://www.algaebase.org [details]   
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
From regional or thematic species database
Description Cells of A. poporum are ovoid and dorso-ventrally compressed. The episome ends with a conspicuous apical pore complex (APC) and is slightly larger than the hyposome. The cingulum is deep and wide, roughly accounting for 1/5 of total cell length. Cells are small and range from 11.3–16.3 μm in length and 8.0–11.6 μm in width (median length: 13.0 μm, median width 9.8 μm, n=48; theca measurement from SEM images) with a median length/width ratio of 1.3. The large nucleus is spherical to slightly elongated and located in the central part of the cell. A single chloroplast is parietally arranged, lobed, and extends into both epi- and hyposome. Several pyrenoids may be visible in the light microscope. Like cells of other Azadinium species, those of A. poporum possess delicate thecal plates, which can be readily seen in the light microscope. The theca can be stained with calcofluor white (not shown), but due to the small size and the delicate nature of the plates, detailed analysis of the plate pattern by fluorescence microscopy proved difficult and thus the plate pattern was resolved by SEM. Generally, the surface of the plates is smooth but irregularly covered by pores of different sizes. The basic thecal plate arrangement was determined as: Po, cp, X, 4', 3a, 6'', 6C, 5?S, 6''', 2''''. The apical pore is round or slightly ellipsoid; it is located in the centre of a pore plate and is covered by a cover plate. The pore plate is bordered by a conspicuous rim, which as part of the apical plates (2', 3', 4') runs around from dorsal to both lateral sides but is lacking ventrally, where the pore plate abuts the first apical plate and the small X-plate. The anterior borderline of the X-plate is difficult to see but when viewed from inside the cell it is obvious that the X-plate is small and ovoid. With the posterior part, the X-plate invades the first apical plate. In most specimens the Po-X-1' connection is slightly asymmetric in that the part of the Po-1' suture right from the X-plate is located further away from the apical pore compared with the left part of the suture, which runs slightly upwards to a conspicuous pore located at the junction of the pore-plate and the first two apical plates (1', 2'). This pore is assumed to be homologous to the ventral pore of the species A. spinosum and A. obesum, where it is located in the middle of the suture of plate 1' and 1''. Subsequently, we denoted this pore as the ventral pore. The ventral pore of A. poporum causes the rim around the APC to be asymmetrical in that the left side ends more posteriorly compared to the right end. The X-plate has the very characteristic three-dimensional structure described for other Azadinium species, with finger-like protrusions contacting the cover plate. The apical series is composed of four plates. Plate 1' is of the ortho pattern, but slightly asymmetrical, with the suture joining plate 6'' being shorter than that joining plate 1''. Plates 2' and 3' are small and plate 4' is distinctly larger and obvious in ventral view, whereas plate 2' is displaced more dorsally, causing the asymmetry of plate 1'. The three intercalary plates are arranged more or less symmetrically on the dorsal side of the epitheca. Intercalary plates are quite different in size with the four-sided plate 2a being distinctively smaller than the two other intercalary plates which are relatively large. The six precingular plates are roughly of similar size, but 1'' is distinctively wider than the 6'' plate. Moreover, plate 1'' is in contact with an intercalary plate (1a) and thus in contact with four epithecal plates, whereas plate 6'' is narrower and only in contact with three epithecal plates. The hypotheca has a plate arrangement consisting of six postcingular and two antapical plates. All postcingular plates are of comparable size, but the four-sided plate 4''' is the smallest, whereas plate 5''' (also four-sided) is the largest. The two ant [details]

Distribution A. poporum has presently been found in European (North Sea) and East Asian (Korea, China) waters, but probably occurs worldwide (Gu et al. 2013). [details]

Harmful effect A.poporum produces azaspiracid toxins, causing AZP (azaspiracid shellfish poisoning) the European strains were originally reported top be non-toxic, bit a new type of azaspiracid was subesquently found in both European and Asian strains (Krock et al. 2012). Chinese strains may form 0-3 different types of AZA, including toxic AZA-2 (Gu et al. 2013. AZA-2 was found in sponges in the Sea of Japan (Ueoka et al. 2009),indicating that AZAs can be expected to accumulate not only in mussels but also in other marine animals. Presently no poisonings have been reported. [details]

Identification Differs from Azadinium spinosum in the absence of an antapical spine. Distinguished from both A. spinosum and A. obesum in the conspicuous location of the ventral pore, which for A. poporum is located within the apical pore complex. In contrast to A. spinosum (one pyrenoid) and A. obesum (no pyrenoids), there may be several pyrenoids (up to four) visible in the light microscope. The Kofoidian plate tabulation is: Po, cp, X, 4', 3a, 6'', 6C, 5?S, 6''', 2''''. Cell length is about 11–16 μm, cell width about 8–12 μm.
 [details]

Type locality North Sea along the Danish coast. [details]

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