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36 results for “Polyrhachis”
Figs 5-6 in Polyrhachis (Hemioptica) becvari nov.sp. (Hymenoptera, Formicidae) from Sri Lanka
Figs 5-6: Polyrhachis (Hemioptica) becvari nov.sp., holotype, worker; (5) lateral view; (6) dorsal view. © E. Ockermüller.
Figs 1-4 in Polyrhachis (Hemioptica) becvari nov.sp. (Hymenoptera, Formicidae) from Sri Lanka
Figs 1-4: Polyrhachis (Hemioptica) becvari nov.sp., heads in frontal view: (1) holotype, worker; (2) paratype, gyne. (3) Labels of holotype. (4) Labels of paratype © E. Ockermüller.
Figs 7-8 in Polyrhachis (Hemioptica) becvari nov.sp. (Hymenoptera, Formicidae) from Sri Lanka
Figs 7-8: Polyrhachis (Hemioptica) becvari nov.sp., paratype, gyne; (7) lateral view; (8) dorsal view. © E. Ockermüller.
Figs 1-3 in Polyrhachis (Myrmhopla) kubani nov.sp. (Hymenoptera, Formicidae) from Laos
Figs 1-3: Polyrhachis (Myrmhopla) kubani nov.sp., holotype. (1) Head in frontal view; (2) labels; (3) mesosoma and petiole in dorsal view. © E. Ockermüller.
Linked collectors and determiners for: Revision of the subgenus Aulacomyrma Emery of the genus Polyrhachis F. Smith, with descriptions of new species..
Natural history specimen data linked to collectors and determiners held within, "Revision of the subgenus Aulacomyrma Emery of the genus Polyrhachis F. Smith, with descriptions of new species.". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/55732097-d5aa-4063-a6b4-e4e75f27c917">https://bionomia.net/dataset/55732097-d5aa-4063-a6b4-e4e75f27c917</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/55732097-d5aa-4063-a6b4-e4e75f27c917">https://gbif.org/dataset/55732097-d5aa-4063-a6b4-e4e75f27c917</a>. Formatted as a Frictionless Data package.
Defensive spines are associated with large geographic range but not diversification in spiny ants (Hymenoptera: Formicidae: Polyrhachis)
<p>Several prominent evolutionary theories propose mechanisms whereby the evolution of a defensive trait or suite of traits causes significant shifts in species diversification rate and niche evolution. We investigate the role of cuticular spines, a highly variable morphological defensive trait in the hyperdiverse ant genus <em>Polyrhachis</em>, on species diversification and geographic range size. Informed by key innovation theory and the escape-and-radiate hypothesis, we predicted that clades with longer spines would exhibit elevated rates of diversification and larger range sizes compared to clades with shorter spines. To address these predictions, we estimated phylogenetic relationships with a phylogenomic approach utilizing ultra-conserved elements (UCEs) and compiled morphological and biogeographic trait databases. In contrast to the first prediction, we found no association between diversification rate and any trait (spine length, body size, and range size). However, we recovered a positive correlation between spine length and geographic range size, suggesting that spines promote expanded geographic range. Notably, these results were consistent across analyses using different phylogenetic inference approaches and spine trait measurement schemes. This study provides a rare investigation of the role of a defensive trait on geographic range size, and ultimately supports the hypothesis that defensive spines are a factor in increased range size in <em>Polyrhachis</em> ants. Furthermore, the lack of support for an association between spines and diversification, which contrasts with previous work demonstrating a positive association between spines and diversification rate, is intriguing and warrants further study.</p>
Defensive spines are associated with large geographic range but not diversification in spiny ants (Hymenoptera: Formicidae: Polyrhachis)
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FIGURE 9 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 9. Polyrhachis luteipes, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 6 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 6. Polyrhachis gerstaeckeri, worker (TANZANIA: Unguga Region, Jozani Forest Res. Zanzibar, 19 m, 6.26755 S 39.41111 E, 30.x–4.xi.2007, CEPF-TZ-10.4-F25, ground water forest, hand collected (P. Hawkes, M. Bhoke, U. Richard) [AFRC: ANTWEB CASENT0235679]): A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by Estella Ortega, provided by www.AntWeb.org)
FIGURE 4 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 4. Polyrhachis epinotalis, worker (CENTRAL AFRICAN REP., P.N.Dzanga-Ndoki, 21.4 km 53° NE, Bayanga, 3°02.01' N 16°24.57' E, 510 m, 6–7.v.2001 (S. van Noort), CAR01-M56-CAR01-M66 [CASENT0087003 CAR01-M65]): A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 2 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 2. Polyrhachis doudou, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 12 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 12. Polyrhachis submarginata, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 5 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 5. Polyrhachis fisheri, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 8 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 8. Polyrhachis longiseta, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 14 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 14. Polyrhachis viscosa, worker (BURKINA FASO, Tiogo (140 km W of Ouagadougou, IV.1999, (M. Ouedraogo) [sample n° 3]): A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 3 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 3. Polyrhachis dubia, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 1 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 1. Polyrhachis brevipilosa, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 7 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 7. Polyrhachis gibbula, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 11 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 11. Polyrhachis omissa, holotype worker: A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by M. Zilioli)
FIGURE 13 in The ant genus Polyrhachis F. Smith in sub-Saharan Africa, with descriptions of ten new species. (Hymenoptera: Formicidae)
FIGURE 13. Polyrhachis terminata, holotype worker (TANZANIA: Morogoro, Kilombero, Zoosite 2, 11.3 km ESE Mbingu, 8.20483 S 36.36055 E, 277 m, 23.x.2007, closed miombo woodland, pitfall trap, FRO 2007_2_P (E. Jew & L. Williams) [SAM: ANTWEB CASENT0250168]): A, body profile; B, dorsum of mesosoma; C, head in full-face view. (Photos by Peter Hawkes, provided by www.AntWeb.org)
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