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34 results for “Amitermes”
FIGURE 21 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 21. Digestive tube of Amitermes foreli worker in dorsal (A), right (B), ventral (C) and left (D) views; arrow: P3 partial pouch.
FIGURE 22 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 22. Schematic drawing of the ornaments at the P1, the respective photomicrographs are indicated by the setae: Amitermes foreli (A), A. lunae (B), A. bandeirai (C) and A. lilloi (D); MT: mesenteric tongue position, EV: enteric valve position.
FIGURE 8 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 8. Enteric-valve armatures: Amitermes amifer (A) and A. aporema (B, distal and C, proximal regions); arrows: apex of cushions.
FIGURE 7. P1 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 7. P1 ornaments details: Amitermes amifer, spines at the proximal portion (A) and at the distal portion (B); A. aporema, spines after the mesenteric tongue (C); A. beaumonti, spines at the proximal portion (D) and at the distal portion (E); and A. excellens, spines at the proximal portion (F) and small spines around mesenteric tongue (G); MT: mesenteric tongue position.
FIGURE 6 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 6. Schematic drawing of the ornaments at the P1, the respective photomicrographs are indicated by the setae: Amitermes amifer (A), A. aporema (B), A. beaumonti (C) and A. excellens (D); MT: mesenteric tongue position, EV: enteric valve position.
FIGURE 13 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 13. Digestive tube of Amitermes aporema worker (from the same locality as the types of A. nordestinus) in dorsal (A), right (B), ventral (C) and left views (D), detail of mesenteric tongue (E); arrow: insertion of P1 at P3.
FIGURE 24 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 24. Enteric-valve armatures: Amitermes foreli (A) and A. lunae (B, distal and C, proximal regions).
FIGURE 23. P1 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 23. P1 ornaments details: Amitermes foreli, spines around mesenteric tongue (A); A. lunae, spines at the proximal portion (B); A. bandeirai, spines at the proximal portion (C) and spines after the mesenteric tongue (D); and A. lilloi, spines at the proximal portion (E); MT: mesenteric tongue position.
FIGURE 5 in Amitermes californicus Banks, 1920 (Isoptera, Termitidae, Termitinae) resurrected after ninety years of synonymy and A. floridensis Scheffrahn, 1989 synonymized into A. wheeleri (Desneux, 1906)
FIGURE 5. Worker enteric valve armature: A,. A. californicus from Madera Canyon, Arizona; B, A. wheeleri from Boerne, Texas.
FIGURE 3 in Amitermes californicus Banks, 1920 (Isoptera, Termitidae, Termitinae) resurrected after ninety years of synonymy and A. floridensis Scheffrahn, 1989 synonymized into A. wheeleri (Desneux, 1906)
FIGURE 3. Amitermes soldier head capsules, dorsal view: A, B. A. californicus from Twenty Nine Palms, California; C, D. A. wheeleri from Corpus Christi, Texas; E, F. A. wheeleri from St. Petersburg, Florida.
FIGURE 2 in Amitermes californicus Banks, 1920 (Isoptera, Termitidae, Termitinae) resurrected after ninety years of synonymy and A. floridensis Scheffrahn, 1989 synonymized into A. wheeleri (Desneux, 1906)
FIGURE 2. Measurements (Table 1) used to compare soldiers of Amitermes californicus (top) and A. wheeleri (bottom).
FIGURE 1 in Amitermes californicus Banks, 1920 (Isoptera, Termitidae, Termitinae) resurrected after ninety years of synonymy and A. floridensis Scheffrahn, 1989 synonymized into A. wheeleri (Desneux, 1906)
FIGURE 1. Distribution of Amitermes californicus and A. wheeleri from the University of Florida Termite Collection and literature records.
Rapid diversification of the Australian Amitermes group during late Cenozoic climate change
<p>Late Cenozoic climate change led to the progressive aridification of Australia over the past 15 million years. This gradual biome turnover fundamentally changed Australia's ecosystems, opening new niches and prompting diversification of plants and animals. One example are termites of the Australian <em>Amitermes</em> Group (AAG), consisting of the Australian <em>Amitermes</em> and affiliated genera. Although the most speciose and diverse higher termite group in Australia, little is known about its evolutionary history. We used ancestral range reconstruction and diversification analyses to illuminate (1) phylogenetic relationships of the AAG, (2) biogeographical processes leading to the current continent-wide distribution, and (3) timing and pattern of diversification in the context of late Cenozoic climate change. By estimating the largest time-calibrated phylogeny for this group to date, we demonstrate monophyly of the AAG and confirm that their ancestor arrived in Australia ~11-10 million years ago from Southeast Asia. Ancestral range reconstruction indicates that Australia's monsoon region was the launching point for a continental radiation shaped by dispersal and within-biome speciation rather than vicariance. We found that multiple arid-zone species diversified from mesic and tropical ancestors in the Plio-Pleistocene, but also observed diversification in the opposite direction. Finally, we show that diversification steadily increased from ~8-9 Ma during the "Hill Gap" and accelerated from ~4 Ma in concert with major ecological change during the Pliocene. Consistent with rapid diversification, species accumulation then slowed down into the present, likely caused by progressive niche saturation. This study provides a stepping stone for predicting future responses of Australia's termite fauna in the face of human-mediated climate change.</p>
FIGURE 3 in A new termite species (Isoptera: Termitidae: Termitinae: Amitermes) and first record of a Subterranean Termite from the Coastal Desert of South America
FIGURE 3. Enteric valve cuticular lining of A. lunae worker. Left: five pads shown, one pad bisected along slit line. Bar = 0.2mm. Right: close up of bottom pads. Bar = 0.05.
FIGURE 2 in A new termite species (Isoptera: Termitidae: Termitinae: Amitermes) and first record of a Subterranean Termite from the Coastal Desert of South America
FIGURE 2. Left: Ventral, dorsal, and lateral habitus of holotype soldier of A. lunae. Bar = 1 mm. Right: Neotropical Amitermes soldier headcapsules: A. A. cryptodon Light, Rabinal, Guatemala; B. A. amicki, Taratara, Venezuela, C. A. beaumonti, La Ceiba, Guatemala; D. A. excellens, El Callo, Venezuela, E. A. foreli, Barquisimeto, Venezuela, F. A. lunae sp. nov., holotype; G. A. amifer Coxipo, Brazil (redrawn from Light 1932); H. A. aporema, Aporema, Brazil (redrawn from Constantino 1992); I. A. ensifer Light, Jala, Mexico (redrawn from Light 1930). Scale bar = 1mm.
FIGURE 1 in A new termite species (Isoptera: Termitidae: Termitinae: Amitermes) and first record of a Subterranean Termite from the Coastal Desert of South America
FIGURE 1. Type locality of A. lunae. Red arrow indicates location where this species was collected from bamboo lying on the soil (photo by C. Chauchat).
Rapid diversification of the Australian Amitermes group during late Cenozoic climate change
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FIGURE 1 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 1. Soldiers in dorsal and lateral views: Amitermes amicki (A, B) and A. amifer (C, D).
FIGURE 18 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 18. Enteric-valve armatures: Amitermes beaumonti (A) and A. excellens (B).
FIGURE 25 in Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers
FIGURE 25. Digestive tube of Amitermes lunae worker: dorsal (A), right (B), ventral (C) and left (D) views; arrow: insertion of P1 at P3.
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