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Certain diatom species, mainly those that are conspicuous within an assemblage, may constitute useful references while addressing various ecological and biogeographical issues. This may well be the case with Mastogloia species which are frequently the most diverse diatom taxa in benthic marine assemblages from warm seas. Twenty three new records of...
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... from the rocky shore of San Benedicto and Socorro islands (Revillagigedo Archipelago); specific sampling points included El Boiler (19°19'38.30" N, 110°48'17.16" W), El Cañón (19°17′40.48" N, 110°48′40.92" W) located in the former and Cabo Pearce (18°45′57.24" N, 110°54′00.30" W) and Punta Tosca (18°46′33.46" N, 111°03′26.01" W) in the latter (Fig. 1). The specimens were sun-dried, transported in plastic bags, and identified in the laboratory following Abbot and Hollenberg (1976). Diatoms were brushed off from each algae specimen while rinsing with purified water. The brushed-off material was placed in a 150 mL test tube and left to settle. Thereafter, the precipitates were ...
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... a common taxon in most samples. *Mastogloia asperuloides F. Hustedt ( Remarks: frequent in samples. Although it resembles a small M. horvathiana, it has square partecta, while in the latter these are narrow rectangular. Remarks: few specimens observed. *Mastogloia biapiculata F. Hustedt (Fig. 11 g, ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: very common, although inconspicuous due to its small size. *Mastogloia cyclops M. Voigt (Fig. 11 a- (Fig. 12 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: very common, although inconspicuous due to its small size. *Mastogloia cyclops M. Voigt (Fig. 11 a- (Fig. 12 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: common; distinguished from M. ovulum by longer partecta and longitudinal wavy lines. Mastogloia erythraea A. Grunow (Fig. 13 a-g). References: Hustedt (1959); Loir and Novarino (2013); Witkowski et al. ...
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... conspicuous but not common. Our specimens fit, with slight variations due to size that of Loir and Novarino's form a. Mastogloia exilis F. Hustedt (Fig. 14 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: small and inconspicuous, frequent in some samples. Mastogloia fimbriata (T. Brightwell) A. Grunow (Figs. 8 g and 15 ...
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... very common and abundant taxon, easily distinguishable from the smaller M. cribrosa, by its more ovate valves and the varied appearance of the partecta. *Mastogloia gilberti A. Schmidt (Figs. 12 t-w and 26 h, ...
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... Foged (1984) (as M. gracillima), p. 53, pl. 33, figure 6; Hustedt (1959) p. 479, figure 899; Peragallo andPeragallo (1897-1908) org/10.22201/ib.20078706e.2022.93.4033 *Mastogloia graciloides F. Hustedt (Fig. 13 ...
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... a taxon appearing frequently, with valves like M. quinquecostata but distinguished by a very different partecta array. Mastogloia horvathiana A. Grunow (Figs. 2 a, 16 a-e). ...
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... Hustedt (1959) p. 518, figure 950c; Loir and Novarino (2013) Remarks: scarce. Similar to M. gilberti, albeit larger. *Mastogloia lineata P. T. Cleve & E. Grove (Fig. 17 ...
Context 13
... Hustedt (1959), p. 538, figure 971. L = 65μm, W = 27 μm, 6 partecta/10 μm, 14 striae/10 μm. ...
Context 14
... scarce. First record for Mexican waters. *Mastogloia manokwariensis B. J. Cholnoky (Fig. 14 x, ...
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... distinguished from M. borneensis, synonymized in Schmidt et al. (1874Schmidt et al. ( -1959, it is less lanceolate and fainter. *Mastogloia mauritiana J. Brun (Figs. 17 d-l and 22 d, ...
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... frequent in samples; several morphological variations observed. *Mastogloia ovata A. Grunow (Figs. 2 c, 19 a-d). ...
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... be confused with M. pseudolatecostata, but partecta are different. Mastogloia ovulum F. Hustedt (Figs. 2 g, 18 f-p). ...
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... of Cocconeis punctatissima (Guiry & Guiry, 2021) this are monoraphid forms, whilst M. punctatissima is birhaphid a trait that can be noted by changing focus in complete frustules (epivalve and hypovalve) as in figures 23, 24, where partecta the distinctive character of Mastogloia are visible (24 c). Mastogloia pusilla var. subcapitata F. Hustedt (Fig. 14 ...
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... very common, showing great size variation: Its coarser striae clearly distinguish it from M. pseudolatecostata, and its partecta from M. horvathiana. Mastogloia parva F. Hustedt (Fig. 11 q, ...
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... Remarks: scarce. May be mistaken for M. emarginata, albeit partecta are different. Mastogloia subaffirmata F. Hustedt in A. W. F. Schmidt (Fig. 11 ...
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... Hustedt (1959), p. 479, figure 900; Simonsen (1987) (Fig. 14 q-t) Reference: Hustedt (1959), p. 570, figure 1004; Loir and Novarino (2013), p. 49, pl. 23, figure c;Simonsen (1987), p. 145, pl. 234, figures 14-17. L = 28-30 μm, W = 8-10 μm, 3-4 partecta/10 ...
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... Hustedt (1959), p. 479, figure 900; Simonsen (1987) (Fig. 14 q-t) Reference: Hustedt (1959), p. 570, figure 1004; Loir and Novarino (2013), p. 49, pl. 23, figure c;Simonsen (1987), p. 145, pl. ...
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... from the rocky shore of San Benedicto and Socorro islands (Revillagigedo Archipelago); specific sampling points included El Boiler (19°19'38.30" N, 110°48'17.16" W), El Cañón (19°17′40.48" N, 110°48′40.92" W) located in the former and Cabo Pearce (18°45′57.24" N, 110°54′00.30" W) and Punta Tosca (18°46′33.46" N, 111°03′26.01" W) in the latter (Fig. 1). The specimens were sun-dried, transported in plastic bags, and identified in the laboratory following Abbot and Hollenberg (1976). Diatoms were brushed off from each algae specimen while rinsing with purified water. The brushed-off material was placed in a 150 mL test tube and left to settle. Thereafter, the precipitates were ...
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... a common taxon in most samples. *Mastogloia asperuloides F. Hustedt ( Remarks: frequent in samples. Although it resembles a small M. horvathiana, it has square partecta, while in the latter these are narrow rectangular. Remarks: few specimens observed. *Mastogloia biapiculata F. Hustedt (Fig. 11 g, ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: very common, although inconspicuous due to its small size. *Mastogloia cyclops M. Voigt (Fig. 11 a- (Fig. 12 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: very common, although inconspicuous due to its small size. *Mastogloia cyclops M. Voigt (Fig. 11 a- (Fig. 12 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: common; distinguished from M. ovulum by longer partecta and longitudinal wavy lines. Mastogloia erythraea A. Grunow (Fig. 13 a-g). References: Hustedt (1959); Loir and Novarino (2013); Witkowski et al. ...
Context 30
... conspicuous but not common. Our specimens fit, with slight variations due to size that of Loir and Novarino's form a. Mastogloia exilis F. Hustedt (Fig. 14 ...
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... Hustedt (1959); Loir and Novarino (2013). Remarks: small and inconspicuous, frequent in some samples. Mastogloia fimbriata (T. Brightwell) A. Grunow (Figs. 8 g and 15 ...
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... very common and abundant taxon, easily distinguishable from the smaller M. cribrosa, by its more ovate valves and the varied appearance of the partecta. *Mastogloia gilberti A. Schmidt (Figs. 12 t-w and 26 h, ...
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... Foged (1984) (as M. gracillima), p. 53, pl. 33, figure 6; Hustedt (1959) p. 479, figure 899; Peragallo andPeragallo (1897-1908) org/10.22201/ib.20078706e.2022.93.4033 *Mastogloia graciloides F. Hustedt (Fig. 13 ...
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... a taxon appearing frequently, with valves like M. quinquecostata but distinguished by a very different partecta array. Mastogloia horvathiana A. Grunow (Figs. 2 a, 16 a-e). ...
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... Hustedt (1959) p. 518, figure 950c; Loir and Novarino (2013) Remarks: scarce. Similar to M. gilberti, albeit larger. *Mastogloia lineata P. T. Cleve & E. Grove (Fig. 17 ...
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... Hustedt (1959), p. 538, figure 971. L = 65μm, W = 27 μm, 6 partecta/10 μm, 14 striae/10 μm. ...
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... scarce. First record for Mexican waters. *Mastogloia manokwariensis B. J. Cholnoky (Fig. 14 x, ...
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... distinguished from M. borneensis, synonymized in Schmidt et al. (1874Schmidt et al. ( -1959, it is less lanceolate and fainter. *Mastogloia mauritiana J. Brun (Figs. 17 d-l and 22 d, ...
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... frequent in samples; several morphological variations observed. *Mastogloia ovata A. Grunow (Figs. 2 c, 19 a-d). ...
Context 41
... be confused with M. pseudolatecostata, but partecta are different. Mastogloia ovulum F. Hustedt (Figs. 2 g, 18 f-p). ...
Context 42
... of Cocconeis punctatissima (Guiry & Guiry, 2021) this are monoraphid forms, whilst M. punctatissima is birhaphid a trait that can be noted by changing focus in complete frustules (epivalve and hypovalve) as in figures 23, 24, where partecta the distinctive character of Mastogloia are visible (24 c). Mastogloia pusilla var. subcapitata F. Hustedt (Fig. 14 ...
Context 43
... very common, showing great size variation: Its coarser striae clearly distinguish it from M. pseudolatecostata, and its partecta from M. horvathiana. Mastogloia parva F. Hustedt (Fig. 11 q, ...
Context 44
... Remarks: scarce. May be mistaken for M. emarginata, albeit partecta are different. Mastogloia subaffirmata F. Hustedt in A. W. F. Schmidt (Fig. 11 ...
Context 45
... Hustedt (1959), p. 479, figure 900; Simonsen (1987) (Fig. 14 q-t) Reference: Hustedt (1959), p. 570, figure 1004; Loir and Novarino (2013), p. 49, pl. 23, figure c;Simonsen (1987), p. 145, pl. 234, figures 14-17. L = 28-30 μm, W = 8-10 μm, 3-4 partecta/10 ...
Citations
... Thus, the 37 Mastogloia taxa recorded here, which represented a dominant component of the assemblages described from the two sargasso species, seem to indicate tropical affinity and thus support the hypothesis. However, these taxa were mostly dissimilar to those described in other tropical regions, such as the Revillagigedo Archipelago, for which the first exploratory studies yielded 51 Mastogloia taxa [40,45]. Moreover, other genera, such as Grammatophora and Caloneis, also considered tropical [38], were poorly represented in the sargasso assemblages. ...
The environmental contingency caused by the recent massive arrivals of pelagic sargasso
(Sargassum natans and S. fluitans) on Mexico’s Caribbean coasts have given rise to several areas of scientific research. Our sargasso species collected on the coasts of Cancun, Isla Mujeres, and Puerto Morelos. We recorded 184 diatom taxa (all illustrated) from 65 genera. Taxa from the genera Mastogloia (37), Cocconeis (11), Nitzschia (10), Diploneis (8), and Amphora (9) represented 41% of the total, while 38 of these genera
were represented by a single species. In the total floristic count, 41 taxa occurred exclusively on S. fluitans, 52 exclusively on S. natans (22 and 28%, respectively) and 91 (49%) were found on both. Species of Navicula were scarce, and Navicula barbara var. densestriata was here transferred to the genus Lyrella (Lyrella barbara var. densestriata (Foged) López-Fuerte & Siqueiros Beltrones comb. nov.). Overall, 17 (9%) of the identified taxa were new recordings for Mexico’s coasts. Supporting the hypothesis proposed, the 37 Mastogloia taxa suggested a tropical affinity, while the high species richness denoted that the surfaces of both sargasso species constituted favorable substrata for the
growth of diatom assemblages.
... Thus, the 37 Mastogloia taxa recorded here, which represented a dominant component of the assemblages described from the two sargasso species, seem to indicate tropical affinity and thus support the hypothesis. However, these taxa were mostly dissimilar to those described in other tropical regions, such as the Revillagigedo Archipelago, for which the first exploratory studies yielded 51 Mastogloia taxa [40,45]. Moreover, other genera, such as Grammatophora and Caloneis, also considered tropical [38], were poorly represented in the sargasso assemblages. ...
The environmental contingency caused by the recent massive arrivals of pelagic sargasso (Sargassum natans and S. fluitans) on Mexico’s Caribbean coasts have given rise to several areas of scientific research. Our work proposed identifying the diatom flora adhered to the thalli of these two sargasso species collected on the coasts of Cancun, Isla Mujeres, and Puerto Morelos. We recorded 184 diatom taxa (all illustrated) from 65 genera. Taxa from the genera Mastogloia (37), Cocconeis (11), Nitzschia (10), Diploneis (8), and Amphora (9) represented 41% of the total, while 38 of these genera were represented by a single species. In the total floristic count, 41 taxa occurred exclusively on S. fluitans, 52 exclusively on S. natans (22 and 28%, respectively) and 91 (49%) were found on both. Species of Navicula were scarce, and Navicula barbara var. densestriata was here transferred to the genus Lyrella (Lyrella barbara var. densestriata (Foged) López-Fuerte & Siqueiros Beltrones comb. nov.). Overall, 17 (9%) of the identified taxa were new recordings for Mexico’s coasts. Supporting the hypothesis proposed, the 37 Mastogloia taxa suggested a tropical affinity, while the high species richness denoted that the surfaces of both sargasso species constituted favorable substrata for the growth of diatom assemblages.
... With the new records from this study (167), the species richness of diatoms found on macroalgae from the Revillagigedo Archipelago reaches a total of 397 taxa. This implies an increase of >75% in this report alone, not including the independently recorded species of the genus Mastogloia whose species richness had previously increased by approximately 75% [10]. Thus, an overall increase in species richness of 90%, including the previously recorded Mastogloia taxa, is attained. ...
Recent investigations at previously unexplored localities on the Mexican coast have confirmed the high taxonomic potential of benthic marine diatom assemblages (BMDA) in the region. An exploratory study of epiphytic diatoms of macroalgae in the Revillagigedo Archipelago (RA) suggested that further studies would yield many more taxa, prompting the hypothesis that diversity measurements, based on ecological indices, would be among the highest in pristine environments. Thus, the aim of this research was to enrich the record of epiphytic diatom floristics of the RA, and to estimate species diversity based on information theory (H′). Floristically, 167 identified taxa are added here to the BMDA species list of the RA, bringing the total to 397 taxa overall, including 52 taxa that are potentially new records for the Mexican Pacific coast. Among the most conspicuous genera are Mastogloia with five new taxa and it remains the most diverse genus with 55 taxa overall, followed by Cocconeis (27), Nitzschia (24), Amphora (23), Navicula (19), Diploneis (17) and Grammatophora (15). As expected for a pristine environment, the computed species diversity values for the BMDA were high, ranging from H′ = 3.92–5.2, depicting stability. Future surveys are expected to further increase the species richness of BMDA for the RA.
