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109 results for “cycads”
Figure 8. Pharaxonotha confusa from Z in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 8. Pharaxonotha confusa from Z. fairchildiana from Burica Peninsula (A–H, J). A–C) Female dorsal, lateral and ventral habitus. D–E) Female head, dorsal and ventral views. F) Tegmen attached to median lobe, ventral view. G) Parameres of tegmen, (top to bottom) ventral and lateral views. H) Male genital capsule, ventral view. I) Retracted ovipositor from Z. pseudomonticola from Porton, ventral view. J) Spermatheca.
Figure 2 in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 2. Relief map of Panama with localities where Pharaxonotha species have been found. Clarkorum group (black numbers): 1) P. clarkorum; 2) P. fortunensis; 3) P. holzmani; 4) P. pseudoparasitica. Confusa group (red numbers): 5) P. confusa; 6) P. panamensis. Manicatae group (dark blue number): 7) P. manicatae. Taylori group (light blue numbers): 8) P. taylori. Kirschii group (white numbers): 9) P. kirschii.
Figure 11. Pharaxonotha taylori. A–C in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 11. Pharaxonotha taylori. A–C) Dorsal, lateral and ventral habitus. D–E) Head, dorsal and ventral views. F) Genital capsule and tegmen attached to median lobe, (top to bottom) ventral and lateral views. G) Tegmen attached to median lobe, (top to bottom) ventral and lateral views. H) Male genital capsule. I) Retracted ovipositor, ventral view. J) Spermatheca. Images F–J reproduced from Skelley and Tang (2020).
Figure 6 in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 6. Pharaxonotha holzmani from Zamia imperialis (A-H: male holotype). A–C) Dorsal, lateral and ventral habitus. D–E) Head, dorsal and ventral views. F) Genital capsule attached to tegmen and median lobe, ventral view. G) Tegmen attached to median lobe, lateral view. H) Parameres of tegmen, (top to bottom) ventral and lateral views. I) Retracted ovipositor with spermatheca, ventral view. J) Spermatheca.
Figure 5 in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 5. Pharaxonotha fortunensis (A–E: male holotype). A–C) Dorsal, lateral and ventral habitus. D–E) Head, dorsal and ventral views. F) Male genital capsule, ventral view. G) Tegmen attached to median lobe, (top to bottom) ventral and lateral views. H) Retracted female genitalia, ventral view. I) Spermatheca.
Figure 1 in Review of Pharaxonotha Reitter (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting cones of the cycad Zamia L. (Cycadales) in Panama, with descriptions of five new species
Figure 1. Spermatheca of Pharaxonotha fawcettae Skelley, Tang and Pérez-Farrera from Jalpan de Serra, Querétaro, Mexico indicating the diagnostic structures and regions used in the key.
Data - Krieg et al. Reproductive phases coincide with changes in morphology and photosynthetic physiology in an endangered cycad species
<p>Summary of the data set used in Krieg et al. (2023) Reproductive phases coincide with changes in morphology and photosynthetic physiology in an endangered cycad species. Conservation Physiology.</p>
Testing the causes of richness patterns in the paleotropics: time and diversification in cycads (Cycadaceae)
<p>The paleotropics harbor many biodiversity hotspots and show many different species richness patterns. However, it remains unclear which factors are the most important in directly shaping richness patterns among regions in the paleotropics (i.e. diversification rates, colonization times, dispersal frequency). Here we used Cycadaceae as a model system to test the causes of regional richness patterns in the paleotropics. Specifically we tested the roles of dispersal frequency, colonization time, diversification rates, and their combined role in explaining richness patterns among regions. We generated a well-sampled, time-calibrated phylogeny and then used this to estimate dispersal events, colonization times, and diversification rates. Richness patterns were significantly associated with the timing of the first colonization of each region, and were best explained by the combined effects of colonization time and diversification rates. The number of dispersal events into each region and the diversification rates of species in each region were not significantly related to richness. Ancestral-area reconstructions showed frequent migrations across Wallace's Line, with a higher diversification rate east of Wallace's Line than west of it. Overall, our study shows that colonization time can be an important factor for explaining regional richness patterns in the paleotropics.</p>
Museomics unveil systematics, diversity and evolution of Australian cycad-pollinating weevils
<p><span>Weevils have been shown to play significant roles in the obligate pollination of Australian cycads. In this study we apply museomics to produce a first molecular phylogeny estimate of the Australian cycad weevils, allowing an assessment of their monophyly, placement and relationships. Divergence dating suggests that the Australian cycad weevils originated from the late Oligocene to the middle Miocene and that the main radiation of the cycad-pollinating groups occurred from the middle to the late Miocene, which is congruent with the diversification of the Australian cycads, thus refuting any notion of an ancient ciophilous system in Australia. Taxonomic studies reveal the existence of nineteen Australian cycad weevil species and that their associations with their hosts are mostly non-species-specific. Co-speciation analysis shows no extensive co-speciation events having occurred in the ciophilous system of Australian cycads. The distribution pattern suggests that geographic factors, rather than diversifying co-evolution, constitute the overriding process shaping the Australian cycad weevil diversity. The synchronous radiation of cycads and weevil pollinators is suggested to be a result of the post-Oligocene diversification common in Australian organisms.</span></p>
Testing the causes of richness patterns in the paleotropics: time and diversification in cycads (Cycadaceae)
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Museomics unveil systematics, diversity and evolution of Australian cycad-pollinating weevils
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Data from: Conserved genetic regions across angiosperms as tools to develop single copy nuclear markers in gymnosperms: an example using cycads
Several individuals of the Caribbean Zamia clade and other cycad genera were used to identify single copy nuclear genes for phylogeographic and phylogenetic studies in Cycadales. Two strategies were employed to select target loci: 1) a tblastX search of Arabidopsis conserved ortholog sequence (COS) set and, 2) a tblastX search of Arabidopsis-Populus-Vitis-Oryza Shared Single Copy genes (APVO SSC) against the EST Zamia databases in Genbank. From the first strategy, 30 loci were selected, and from the second, 16 loci. In both cases the matching Genbank accessions of Zamia were used as a query for retrieving highly similar sequences from Cycas, Picea, Pinus species or Ginko biloba. After retrieving and aligning all the sequences in each locus, intron predictions were completed to assist in primer design. PCR was carried out in three rounds to detect paralogous loci. A total of 29 loci were successfully amplified as a single band of which 20 were likely single copy loci. These loci showed different diversity and divergence levels. A preliminary screening allowed us to select 8 promising loci (40S, ATG2, BG, GroES, GTP, LiSH, PEX4 and TR) for the Z. pumila complex and 4 loci (COS26, GroES, GTP and HTS) for all other cycad genera.
FIGURE 13 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 13. Dioon salas-moralesae in the locality of Santiago Lachiguiri, Oaxaca. (A) Adult plants with erect trunk. (B) Open crown of leaves. (C) Megastrobilus.
FIGURE 11 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 11. Strobili of Dioon salas-moralesae sp. nov. in living plants from the type locality in San Miguel Tenango, Oaxaca. (A) Microstrobilus. (B) Megastrobilus.
FIGURE 12 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 12. Adult plants of Dioon salas-moralesae in the type locality (San Miguel Tenango, Oaxaca). (A) Plant showing ascendant crown of leaves. (B) Plant with erect trunk. (C) Close-up of megastrobilus.
FIGURE 10 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 10. Dioon salas-moralesae sp. nov. (A) Adult female plant viewed from below and details of trunk. (B) View from above showing the shape of leaves in living plant. (C) Group of plants. (D) Seeds (scale = 2 cm). (E) Detail of petiole (scale = 2 cm). (F) Abaxial view of leaf; note imbricate leaflets (scale = 10 cm). Photo A by Takuro Ito.
FIGURE 2 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 2. Leaf variation among populations in the Dioon merolae species complex. Details of the median portion of leaves of (A) D. oaxacensis, (B) D. salas-moralesae, (C) D. merolae. Scales = 10 cm.
FIGURE 1 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 1. Distribution map of the surveyed populations in this study. (A) The three lineages revealed in Gutiérrez-Ortega et al. (2020a) were recognized as D. oaxacensis (Pops1–2) (Gutiérrez-Ortega et al., 2020b), D. merolae-West (here described as D. salas-moralesae sp. nov.) (Pops 3–6) and D. merolae (Pops7–10). Other populations that were not sampled for this study, but belong to D. oaxacensis or D. salas-moralesae are indicated with smaller, non-numbered circles. (B) Our previous genetic study using 1745 unlinked genome-wide single nucleotide polymorphisms obtained with Restriction site-associated DNA sequencing (Gutiérrez-Ortega et al., 2020a) revealed that D. oaxacensis (oax) is sister to D. merolae (mer) and the new species D. salas-moralesae (sal). D. salas-moralesae and D. merolae are separated by the Isthmus of Tehuantepec, an important barrier, consistent with the idea that they refer to distinct biological units. Population numbers correspond to those shown in Table 1.
FIGURE 5 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 5. Comparison of megastrobili of three examined lineages in the Dioon merolae species complex. (A) Lateral view of D. oaxacensis, D. salas-moralesae and D. merolae. (B) The color of basal scales can distinguish the three species. Scales in each panel are indicated. Photos by José García.
FIGURE 6 in A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico
FIGURE 6. Comparison of sporophylls of three examined lineages in the Dioon merolae species complex. (A) Abaxial side of microsporophylls. (B) Abaxial side of megasporophylls. Scales in each panel are indicated. Photos by José García.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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OpenNeuro
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