113:
481:
134:
872:
594:
858:
628:
The head is small and wider than long, with a generally triangular outline in dorsal view. The upper surface is thickened into a shield with a curved and raised profile and two elongated processes extend out and slightly forward from the rear of the head. The eyes are either reduced to such a degree
451:
An analysis and re-examination of the type workers was conducted by Leonid H. Borysenko of the
Canadian National Collection of Insects, Arachnids and Nematodes and the results were published in a 2017 paper. While examining the holotype, Borysenko noted that most of the head along with parts of the
358:, specimen number "CAS 330" entombed in an 8 mm Γ 3 mm Γ 2 mm (0.315 in Γ 0.118 in Γ 0.079 in) amber chunk. At the time of the genus description, the specimen was residing in the Canadian National Collection of Insects, Arachnids and Nematodes, in
637:
is small and strongly curved, with the front margin that faces the inner sides of the mandibles covered in 25, 0.01 mm (0.00039 in) long, peg-like setae. Each mandible is curved almost 90Λ with the bases covered by the edges of the clypeus lobes. On the mandible's ends are two teeth, a
638:
smaller sub-apical one and a larger apical one with a groove that likely matches the position of the opposite mandible placement when they are closed. The antennae are distinctly 11-segmented, with a curved scape that just reaches the rear margin of the head capsule when reclined.
431:
It was noted in 1988 by
Dlussky and Fedoseeva that the original description was based mostly on measurements alone and further that the holotype and paratype workers were likely not from the same ant genus. In 1996, Dlussky noted the antennae of
604:
The holotype worker is 3.2 mm (0.13 in) long with an 0.73 mm (0.029 in) head and a Weber's length of 1.2 mm (0.047 in). Much of the body is the same coloration as the surrounding amber, while the lower half of the
528:
found associated with the amber. While few vegetative remains are found associated with
Canadian amber, spectroscopic analysis and rare entombed foliage indicated the cupressaceous tree which produced the amber is likely a species of
452:
antennae and mandibles were obscured by positioning in the amber. Sections of the specimen were re-polished and a number of new details became visible, allowing for the re-description of the extinct species into a new genus,
409:
in 1985, a holotype and less complete paratype, both of which were held in the collections of the
Biosystematics Research Institute in Ottawa. In the type description they were placed by Wilson as a species of
477:. Examination of the paratype worker led Borysenko to conclude that the ant was too fragmented and no identifying characters were present, and thus not to be included as a paratype.
963:
673:"Description of a new genus of primitive ants from Canadian amber, with the study of relationships between stem- and crown-group ants (Hymenoptera: Formicidae)"
1042:
508:
flies, Borkent in 1995 suggested the paleohabitat was a mix of salt marshes, wetland pools and moist sands. This mixture is supported by the presence of
950:
593:
1027:
112:
838:
1017:
1052:
1022:
569:
133:
634:
428:
was mentioned by Wilson in the description, but little descriptive information distinguishing the two was provided.
1032:
557:
700:
480:
994:
862:
1047:
1037:
610:
501:
418:, with the species name a reference to the country of discovery. The similarity of visible traits between
890:
976:
391:
249:
563:
510:
398:. Canadian amber has been dated to an age of approximately 79β78 million years old, placing it in the
581:
575:
387:
829:
McKellar, R. C.; Wolfe, A. P.; Penney, D. (2010). "Chapter 9: Canadian amber". In Penney, D. (ed.).
701:"A new trap-jawed ant (Hymenoptera: Formicidae: Haidomyrmecini) from Canadian Late Cretaceous amber"
371:
367:
531:
733:
383:
274:
128:
981:
968:
942:
928:
876:
555:
is one of several ant species that have been described from
Canadian amber, the others include
834:
441:
764:
723:
715:
505:
395:
324:
314:
208:
625:
are an opaque black tone. There is no distinct sculpturing to the exoskeleton surface.
518:
1011:
672:
618:
614:
547:
515:
461:
63:
737:
497:
473:
464:
406:
913:
787:
Dlussky, G. M. (1999). "New ants (Hymenoptera, Formicidae) from
Canadian amber".
922:
522:
420:
363:
333:
185:
38:
871:
471:
into a new tribe of
Sphecomyrminae, Zigrasimeciini along with the sister genus
331:. The type species was originally described as a species of the extinct genus
83:
48:
622:
606:
399:
165:
145:
88:
32:
857:
907:
807:
769:
541:
496:
Analysis of the composition of
Canadian amber indicates it originated as
457:
355:
310:
78:
73:
58:
53:
43:
719:
500:
resins which were deposited in lagoons and salt water marshes along the
989:
955:
299:
93:
68:
728:
937:
630:
629:
that they are not visible, or are possibly lost all together, and no
359:
328:
175:
155:
884:
752:
592:
525:
479:
375:
302:
888:
831:
Biodiversity of
Fossils in Amber from the Major World Deposits
613:
are a brown to black tone. Additionally the undersides of the
306:
195:
621:
are brown to black, while the upper surfaces of the head and
753:"Ants From the Cretaceous and Eocene Amber of North America"
699:
McKellar, R. C.; Glasier, J. R. N.; Engel, M. S. (2013).
551:
and shared a similar habitat preference of marshy areas.
405:
Two workers were first studied by paleoentomologist
897:
808:"Ants (Hymenoptera: Formicidae) from Burmese amber"
317:. The genus contains a single described species,
666:
664:
662:
660:
658:
656:
654:
652:
650:
521:, which are indicators of brackish waters, and
694:
692:
690:
782:
780:
8:
833:. Siri Scientific Press. pp. 149β166.
448:it is the second segment which is longest.
885:
362:, Canada. The described specimen is of a
111:
20:
768:
727:
382:from the Taber coal zone near the top of
354:is known from a single adult fossil, the
646:
504:. Based on the diversity of included
366:adult which has been preserved as an
7:
995:5FEAA4E6-D612-4954-897C-470A6B6F974F
1043:Cretaceous insects of North America
456:. The genus name was coined as a
440:, having a longer first and fifth
14:
370:in a transparent orange chunk of
870:
856:
132:
757:Psyche: A Journal of Entomology
1:
1028:Fossil taxa described in 2017
617:plus the upper halves of the
570:Chronomyrmex medicinehatensis
323:, and is known from a single
1018:Monotypic fossil ant genera
1069:
347:History and classification
327:fossil which was found in
1053:Insects described in 2017
558:Cananeuretus occidentalis
280:
273:
255:
248:
129:Scientific classification
127:
119:
110:
23:
671:Borysenko, L.H. (2017).
402:of the Late Cretaceous.
1023:Late Cretaceous insects
812:Paleontological Journal
806:Dlussky, G. M. (1996).
789:Paleontological Journal
600:head, anterodorsal view
553:Boltonimecia canadensis
502:Western Interior Seaway
378:specimen was recovered
320:Boltonimecia canadensis
262:Boltonimecia canadensis
601:
488:
416:Sphecomyrma canadensis
340:Sphecomyrma canadensis
337:under the combination
284:Sphecomyrma canadensis
977:Paleobiology Database
751:Wilson, E.O. (1985).
708:Canadian Entomologist
609:and underside of the
596:
539:is related to modern
483:
16:Extinct genus of ants
867:at Wikimedia Commons
582:Haidoterminus cippus
576:Eotapinoma macalpini
467:. Borysenko placed
720:10.4039/tce.2013.23
770:10.1155/1985/57604
602:
489:
486:Zigrasimecia ferox
442:funicular segments
384:Foremost Formation
241:B. canadensis
1033:Insects of Canada
1005:
1004:
891:Taxon identifiers
861:Media related to
840:978-0-9558636-4-6
633:are visible. The
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229:
1060:
998:
997:
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959:
958:
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875:Data related to
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845:
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820:
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763:(2β3): 205β216.
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564:Canapone dentata
511:Haplophragmoides
460:in honor of the
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123:holotype worker
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35:
29:Temporal range:
21:
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591:
506:Ceratopogonidae
494:
434:"S." canadensis
426:"S." canadensis
396:Alberta, Canada
349:
325:Late Cretaceous
315:Zigrasimeciinae
269:
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258:
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228:Borysenko, 2017
226:
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209:Zigrasimeciinae
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1048:Canadian amber
1045:
1040:
1038:Sphecomyrminae
1035:
1030:
1025:
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1010:
1009:
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1002:
1000:
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903:
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881:at Wikispecies
868:
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851:External links
849:
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776:
743:
714:(4): 454β465.
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587:
493:
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436:differed from
390:which is near
372:Canadian amber
348:
345:
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278:
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268:(Wilson, 1985)
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818:(4): 449β454.
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677:Insecta Mundi
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598:B. canadensis
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548:Glyptostrobus
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516:foraminiferan
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498:cupressaceous
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462:myrmecologist
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250:Binomial name
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121:B. canadensis
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34:
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22:
19:
943:Boltonimecia
929:Boltonimecia
899:Boltonimecia
898:
878:Boltonimecia
877:
864:Boltonimecia
863:
830:
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815:
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603:
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537:Parataxodium
536:
532:Parataxodium
530:
509:
495:
492:Paleohabitat
485:
474:Zigrasimecia
472:
469:Boltonimecia
468:
465:Barry Bolton
454:Boltonimecia
453:
450:
445:
437:
433:
430:
425:
419:
415:
411:
407:E. O. Wilson
404:
392:Medicine Hat
379:
364:worker caste
352:Boltonimecia
351:
350:
339:
338:
332:
319:
318:
295:Boltonimecia
294:
293:
292:
283:
261:
256:
240:
239:
223:Boltonimecia
222:
221:
120:
25:Boltonimecia
24:
18:
923:Wikispecies
589:Description
523:crocodylian
444:, while in
412:Sphecomyrma
388:Grassy Lake
334:Sphecomyrma
202:Subfamily:
186:Hymenoptera
1012:Categories
729:1808/14425
642:References
313:subfamily
196:Formicidae
166:Arthropoda
914:Q54355473
795:(4): 409.
607:propodeum
400:Campanian
368:inclusion
234:Species:
152:Kingdom:
146:Eukaryota
33:Campanian
969:11911534
908:Wikidata
738:53993056
623:pronotum
542:Taxodium
514:species
484:Head of
458:patronym
446:S. freyi
438:S. freyi
421:S. freyi
356:holotype
311:formicid
275:Synonyms
192:Family:
162:Phylum:
156:Animalia
142:Domain:
990:ZooBank
956:9285397
683:: 1β57.
635:clypeus
386:around
380:in situ
374:. The
309:in the
300:extinct
259:†
238:†
215:Genus:
182:Order:
176:Insecta
172:Class:
100:↓
982:361570
938:AntWeb
837:
736:
631:ocelli
619:tibiae
611:gaster
579:, and
526:scutes
360:Ottawa
329:Canada
298:is an
964:IRMNG
734:S2CID
704:(PDF)
615:coxae
519:tests
376:amber
303:genus
951:GBIF
835:ISBN
545:and
424:and
39:Preκ
765:doi
724:hdl
716:doi
712:145
681:570
535:.
307:ant
305:of
1014::
992::
979::
966::
953::
940::
925::
910::
816:30
814:.
810:.
793:33
791:.
779:^
761:92
759:.
755:.
732:.
722:.
710:.
706:.
689:^
679:.
675:.
649:^
585:.
573:,
567:,
561:,
414:,
394:,
343:.
89:Pg
843:.
773:.
767::
740:.
726::
718::
219:β
206:β
94:N
84:K
79:J
74:T
69:P
64:C
59:D
54:S
49:O
44:κ
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