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20 results for “Zigrasimecia”
FIGURE 11 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 11. Type series of Zigrasimecia ferox. Putative taphonomic effects (A and B) and the corresponding states assumed to be true for the species (C and D). Black triangles in A and C point to the metanotum (or anterior propodeal) level, with holotype in A having a bump which could be an artifact of preservation. Black triangles in B and D indicate the apex of the petiole node, possibly artificially reduced by compression in B. Gray triangles in B and D indicate the anterior surface of A3 tergite, with the shelf-like projection in B being probably the result of folding of the sclerite in the taphonomic process. Cinctus on A4 (E and zoomed in F) is interpreted as a true feature of Z. ferox, not an artifact of preservation. In F, the white triangles show posterior edge of A3, black triangles indicate constriction on A4 (cinctus), which separates pre- and posttergites 4, and gray triangle shows swollen intersegmental membrane or internal liquid overflow.
FIGURE 20. Morphospecies Zigrasimecia ufv-11. A and B in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 20. Morphospecies Zigrasimecia ufv-11. A and B, head in full-face and anterior views, respectively, of specimen ANTWEB1047053, black triangle indicates curved, decumbent setae on frons and vertex; C, profile view of right side of body of specimen ANTWEB1047903. Scale bar 0.2 mm in A, and 0.5 mm in C.
FIGURE 17. Morphospecies Zigrasimecia ufv-08 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 17. Morphospecies Zigrasimecia ufv-08, two specimens originally in the same piece (separated for study). Specimen UFV-LABECOL-010580 in A, C and D and specimen UFV-LABECOL-010579 in B. A, full-face view of head; B, profile of left side of body; C, zooming of left side of metasoma in profile; D, detail of mesosoma in dorsal view. Scale bars are 0.2 mm.
FIGURE 6 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 6. Holotype of Zigrasimecia boudinoti (ANTWEB1032623). A, full-face view of the head; B, profile view of left side of body; C, right portion of anterior head, evincing clypeal lobe, and clypeal, mandibular and labral chaetae; D, profile of the right side of mesosoma with metanotal and propodeal spiracles indicated (mtsp and propsp) and propodeal spiracle magnified on the bottom right corner (under epifluorescence light); E, profile of right side of the head; F, dorsal view of the body. Scale bars are 0.2 mm in A, B, and F and 0.1 mm in C and E. Abbreviations: Umspl, upper mesopleuron; Lmspl, lower mesopleuron; Lmtpl, lower metapleuron; MesL, mesosoma length.
FIGURE 3 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 3. Comparison between Gerontoformica and Zigrasimecia cephalic and mandibular morphology (see genus diagnosis above for detailed explanation). A and C, schematic drawing of full-face view of Gerontoformica and Zigrasimecia, respectively. B and D, lateral view of anterior head of Gerontoformica (ANTWEB1032649) and Zigrasimecia (ANTWEB1032623), respectively. Abbreviations: cl, clypeus; cllb, clypeal lobe; dsm, dorsal surface of mandible; fcr, frontal carina; plstf, pleurostomal fossa; tl, torulus. In D, white line indicates plane (as seen laterally) of labrum; gray line is the plane (as seen laterally) of the apical half surface of the mandible; and black line shows the strong mandible curvature.
FIGURE 19. Morphospecies Zigrasimecia ufv-10 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 19. Morphospecies Zigrasimecia ufv-10 (specimen ANTWEB1047051). A, anterolateral view of right side of body; B. Zoom of head and mesosoma of same view of A, black triangle indicates putative promesonotal suture. Scale bar is 0.5 mm in A and 0.2 mm in B.
FIGURE 18. Morphospecies Zigrasimecia ufv-09 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 18. Morphospecies Zigrasimecia ufv-09 (specimen ANTWEB1047064). A, head in full-face view; B, profile of left side of body; C, anterior (slightly dorsal) view of mouthparts; D, zoom of propodeum, petiole and first gastral tergite, evincing filiform setae on body.
FIGURE 13 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 13. Holotype of Zigrasimecia thate (ANTWEB1038912). A, full-face view of the head, black triangles indicate mandible dorsal setae; B, profile view of left side of body; C, anterior view of the head; D, dorsal view of the body; E, zoom of flagelliform setae on frons and vertex (same view as C); F, detail of mesosomal profile. Abbreviations: Lmspl, lower mesopleuron; Lmtpl, lower metapleuron; mgo, metapleural gland opening; Ppd, propodeum; Prn, pronotum; sp, spiracles (metanotal and propodeal); Umspl, upper mesopleuron. Scale bars are 0.2 mm in B and D, and 0.1 mm in A.
FIGURE 8 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 8. Holotype of Zigrasimecia caohuijiae (ANTWEB1041055). A, dorsal view of mesosoma and petiole; B, detail of the right side of the petiole in profile, white triangle indicates the edge of the sclerite (posterior petiole tube or collar); C, zooming of pronotum in dorsal view under epifluorescent light, black triangles in A and C indicate minute decumbent setae on mesosoma (setae also clear in image D); D, zooming of propodeum and petiole under epifluorescent light; E, posterolateral view of propodeum, black triangle indicates hypertrophied propodeal spiracle; F, detail of probasitarsus, showing concentration of long, fine setae, white triangle indicates calcar with simple tip (not bifid), and black triangle indicates mesopretarsal claws with toothed inner margins; G, inner face of protibia and probasitarsus, showing two spur-like setae next to calcar; H, detail of abdominal segment VII and sting, black triangles show gonostyli. Scale bars are 0.1 mm.
FIGURE 12 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 12. Holotype of Zigrasimecia perrichoti (UFV-LABECOL-010301). A, full-face view of the head; B, profile view of right side of body (crack in the amber on the upper mesosoma and upper head level creating a mirror effect in the image); C, detail of anterior head showing clypeal lobes, and clypeal, mandibular and labral chaetae; D, dorsal view of head and mesosoma; E, dorsal view of gaster; F, meso- and metatibia and meso- and metabasitarsus, white asterisks at distal mesotibia and basal mesobasitarsus, white triangle points to tip of mesotibial spur; black asterisks and triangle the same positions in the hind leg. Scale bars are 0.2 mm in A, D, and E; 0.1 mm in C; and 0.5 mm in B.
FIGURE 16. Morphospecies Zigrasimecia ufv-06 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 16. Morphospecies Zigrasimecia ufv-06 (specimen ANTWEB1032645). A, profile of right side of body; B, left side of petiole in dorsolateral view; C, meso- and metatibiae (upper and lower portions of image, respectively), evincing thickened, truncate pilosity. Scale bars are 0.2 mm.
FIGURE 4 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 4. Ventral view of the head of Gerontoformica (A) and Zigrasimecia (B). Abbreviations: cllb, clypeal lobe; dsm, dorsal surface of mandible; lb, labrum; oc, occipital carina; pgs, postgenal suture; plstf, pleurostomal fossa.
FIGURE 7 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 7. Holotype of Zigrasimecia caohuijiae (ANTWEB1041055). A, full-face view of the head (view of anterior portion blocked by an insect antenna and bubbles); B, profile view of right side of body; C, ventrolateral view of anterior portion of head; D and F, anterior view of head, with a full view of dorsal surface of mandibles, F is under epifluorescence; E, dorsal view of the body; G and H, Detail of mesosoma under different types of epifluorescence. Scale bars are 0.2 mm in A, B and E and 0.1 mm in C and D. Black triangles point to the labral medial lobes (laterally to the median lobes in D a pair of protuberances which are likely the hypostomal teeth). Abbreviations: cllb, clypeal lobe; dsm, dorsal surface of mandible; Lmspl, lower mesopleuron; Lmtpl, lower metapleuron; sp, spiracle; Umspl, upper mesopleuron; vsm, ventral surface of mandible.
FIGURE 15. Morphospecies Zigrasimecia ufv-04 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 15. Morphospecies Zigrasimecia ufv-04 (specimen ANTWEB1038932). A, head in full-face view; B, profile of right side of body; C, detail of mandibles and clypeus, black triangles indicate clubbed setae on gena; D, posterodorsolateral view of mesosoma and head; E, phoretic mite on mesotibia, with a simplified scheme below the image. Scale bars are 0.2 mm in A, B and D and 0.05 mm in E.
FIGURE 1 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 1. Schematic drawings of most of the measurements taken from the specimens (presented in the species descriptions or in Appendix 1). See Materials and Methods or Appendix 1 for a detailed explanation of the measurements. Codes: a, head length; b, head length 2; c, head width; d, head width 2; e, head width 3; f, head maximum depth; g, mesosoma length (see also Fig.6); h, mesosoma height; i, propodeal spiracle length; j, petiole anterior face length; k, posttergite 3 length; o, posttergite 4 length. Measurements a, g, j, k, and o summed equal total length (TL). Gaster measurements l, m, n, and p are additional metasomal measurements that are useful if the measurements k and o are blocked (see Appendix 1).
FIGURE 5 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 5. Types of mesosoma in fossil and extant ants. A, Gerontoformica; B, Protozigrasimecia; C, Zigrasimecia; D, Brownimecia; E, Brachyponera and F, Discothyrea. Among extant ants, Discothyrea presents a degree of mesosomal compaction similar to that of Zigrasimecia. Abbreviations: Lmspl, lower mesopleuron; Lmtpl, lower metapleuron; mgo, metapleural gland opening; Msn, mesonotum; Mspl, mesopleuron; Mssct, mesoscutum; Mssctl, mesoscutellum; Mtn, metanotum; Ppd, propodeum; Prn, pronotum; Prpl, propleuron, sp, spiracle; Umspl, upper mesopleuron; Umtpl, upper metapleuron.
FIGURE 2 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 2. Masticatory margin of mandible in Gerontoformica and Zigrasimecia. A, Gerontoformica sp. (ANTWEB1032629); B, Z. ferox (ANTWEB1008126); C, Z. chuyangsui (ANTWEB1032660); D, Z. tonsora (ANTWEB11008098). Black triangles indicate incision between apical and basal teeth (or basal lamella). Image of Z. tonsora by Philip Barden and image of Z. ferox by Vincent Perrichot, courtesy of Antweb.org.
FIGURE 09 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 09. Holotype of Zigrasimecia chuyangsui (ANTWEB1032660). A, Head in anterodorsal view; B, dorsal view of the body; C, profile of left side of the body. Scale bars are 0.2 mm in A and C and 0.5 in B.
FIGURE 14 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 14. Relative body size comparison of all described species of Zigrasimecia (with morphospecies Zigrasimecia ufv-11 included, see Section 3.3 of text).
FIGURE 10 in A revision of the Cretaceous ant genus Zigrasimecia Barden & Grimaldi, 2013 (Hymenoptera: Formicidae: †Zigrasimeciinae)
FIGURE 10. Holotype of Zigrasimecia chuyangsui (ANTWEB1032660). A, zooming of anterodorsal view of head, showing mouthparts, black triangles from top to bottom point to clypeal, labral, and mandible chaetae; B, 6-segmented right maxillary palp; C, left protarsus, black triangle points to tip (bifid) of protibial calcar; D and E, dorsal and lateral zooming of petiole obscured by bubbles, black triangles in D indicate posterior margin of petiole node and in E indicates tip of subpetiolar process. Abbreviations: b1 and b2, bubbles; nd, petiole node; pmx1–pmx6, maxillary palpomeres 1–6; ppd, propodeum; t3, tergum of abdominal segment 3 (first gaster tergite).
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