New Jersey amber

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Brownimecia clavata holotype, lateral view, fossil in New jersey amber, specimen number AMNH-NJ667 Brownimecia clavata AMNH-NJ667 holotype 01.jpg
Brownimecia clavata holotype, lateral view, fossil in New jersey amber, specimen number AMNH-NJ667

New Jersey Amber, sometimes called Raritan amber, is amber found in the Raritan and Magothy Formations of the Central Atlantic (Eastern) coast of the United States. It is dated to the Late Cretaceous, Turonian age, based on pollen analysis of the host formations. It has been known since the 19th century, with several of the old clay-pit sites now producing many specimens for study. It has yielded a number of organism fossils, including fungi, plants, tardigrades, insects and feathers. The first identified Cretaceous age ant was described from a fossil found in New Jersey in 1966.

Contents

Occurrence

Though named after New Jersey, the fossil-bearing strata of the Raritan and overlying Magothy formations are also exposed in several neighboring U.S. states, including Maryland through south and central New Jersey, across Staten Island and Long Island (coastal areas of New York state), to a northern exposure at Martha's Vineyard, an island of Massachusetts. [1]

Of the two formations that New Jersey amber is found in, the Raritan Formation underlies the Magothy Formation. The Magothy formation is reported by Wilson's 1967 paper describing Sphecomyrma freyi as having exposures in Maryland, New Jersey, New York, Delaware, and other unspecified islands along the New England coastline. The formation consists of gray to dark brown clay beds interlayered in light-colored sands. In the clay layers are lignite lenses, leaf impressions, and the amber. At the time of the paper's publication, the age was uncertain, and given by Wilson and Carpenter as approximately 100 million years old. [2] Amber deposits of the Raritan Formation are mainly in the Old Bridge sand member and South Amboy Fire Clay Member, with the latter being fossilized in situ, with no disturbance after deposition. Palynological dating of the South Amboy Fire clay has returned a Turonian age, placing the members in the Complexiopollis – Santanacites palynostratigraphic zones. [1]

Amber specimens are recovered from the South Amboy Fire Clay member, part of the Raritan Formation. Deposited in lagoons and saltwater marshes along the Cretaceous eastern seaboard. [3] The lithology exposed in the Crossmans clay pits shows that the lagoons and marshes had brackish water channels where water flow diminished and anoxic conditions formed. This is supported by the presence of pyrite and marcasite on and around amber specimens, with some amber totally encased in the iron sulphides. The number of insect groups that need fresh water to survive, such as caddisflies, indicates that fresh water was close to the delta area. [1]

Amber was first mentioned in 1821 by naturalist Gerard Troost, who described a specimen which contained a group of fossil scale insects from an outcrop at Cape Sable, Maryland. [1] Hollick reported in 1905 that during the height of clay mining at the turn of the 20th century, amber was found in such volumes that it was saved, and burned during the winter for heat. A number of the clay mines are now sources of amber for study. [1] The White Oaks site (or White Oaks pit) is part of the Old Crossman's pit clay mine in Sayreville, New Jersey. It contains outcrops of the amber-bearing South Amboy Fire Clay that are noted to be rich in inclusions. [4]

Chemistry

Amber preserved in resin block Plumalexius ZooKeys-130-515-g001a.jpg
Amber preserved in resin block

New Jersey amber is grouped by Anderson 1992 as a Class Ib amber, being composed of labdanoid diterpenes, and lacking a presence of succinic acid in the structure. [5] Ragazzi et al in 2003 listed the possible plant families the amber may have been produced by as including Cupressaceae, Araucariaceae, or Hamamelidaceae, [6] but only Cupressaceae was listed by Bisulca et al. [5] The amber is noted as being insoluble in solutions of both ethyl ether and ethanol. Ragazzi et al indicated that New Jersey amber had a distinct amount of sulphur, 0.29%, included in its chemical composition. [6] The color of the amber ranges from clear yellows and yellow oranges through opaque yellows and reds. The amber is noted to be brittle and friable, with specimens noted to crack and craze. Deep-red amber specimens are also noted to form deep needle-like cracks. [5] A series of tests on ambers, including New Jersey amber, was published in 2012 by Bisulca et al. Exposure to a combination of light and humidity changes can cause significant crazing. The amber also has a distinct light absorbance curve that peaks in the ultraviolet B range at 385 nm. This is similar to the slightly older Burmese amber, which has an absorbance peak of 380 nm. Exposure to increase in temperature over a period of time has been shown to result in "yellowing" or darkening of the amber over a long period of time, though not to as significant a degree as seen in Baltic amber. Overall the stability of New Jersey amber is low due its UV absorption, making specimens susceptible to UV deterioration. The only conditions that Bisulca et al identified which seemed to produce stable New Jersey amber specimens were those that were anoxic. [5]

Botanical origin

Edward W. Berry notes that an "amber-like" substance preserved in resin canals of fossil conifer cones that he assigned to taxon "Dammara". Berry suggests that the majority of the amber in the taxon was considered araucarian in relationship by Barry and his contemporaries. Restudy of the fossils identify them as not araucarian, but cupressaceous in relation. [7] Wilson and Carpenter noted in 1966 that study of pollen spores and cones in the Mogathy and older Potomac Formation has suggested Metasequoia , Sequoiadendron or a related Taxodiaceae genus. [2] Work using pyrolysis gas chromatography-mass spectroscopy published in 2000 linked the amber to the "Dammara conescales, fossil Pityoxylon woods and possibly Juniperus hypnoides foliage. Further work identified methyl callitrisate, a identifying compound of Cupressaceae, in the ambers composition. [1]

Paleobiology

Plumalexius rasnitsyni Plumalexius ZooKeys-130-515-g002c.jpg
Plumalexius rasnitsyni
Sphecomyrma mesaki AMNH-NJ1023 Sphecomyrma mesaki.jpg
Sphecomyrma mesaki

The organisms preserved in New Jersey amber are diverse, with fungus, plant, and animal inclusions having been described. Fungi are represented by a single described Agaricales species. Plant fossils are also sparse, with conifer shoots from a Cupressaceae member, plus several undescribed flowers from a fagalean angiosperm. [1]

Of the inclusions found in Sayreville ambers, 34% are identified as dipterans, [4] while a 2001 paper notes that up to 20% of the inclusions found in New Jersey amber are of coccoid true bugs. [8] In 2010 the coccoid number was reported to only be 10% of all inclusions, while nematoceran flies made up 30% of the inclusions and parasitoid wasps also constituted 30%. [1]

In 1967 a pair of fossil ants were described from a fossil found at a New Jersey beach exposure. The ants were described as the extinct species Sphecomyrma freyi, and were the first conclusive ants identified from the Cretaceous. [2] Since that time a series of other ant genera have been identified in the New Jersey amber. [3]

Associated with the amber deposits at the Old Crossmans locality are fossil plants and insects preserved as fusianized charcoal remains. Ferns, gymnosperms, mosses and over one hundred angiosperm taxa have been identified from the Raritan formation lignite fossils. [9] The plants, such as Microvictoria svitkoana [9] and insects such as Paracupes svitkoi [10] were entombed in the anoxic forest floor and then transformed to carbon remains by possible forest fires. Specimens of amber show evidence of heating in fire as well, having large amounts of bubbles on outer surfaces, and a milky to chalky coloration. The fires are one of possible causes for the large amount of resin production that resulted in the amber. [1] A study published in 2011 suggested that the majority of the resin production was initiated by the boring activity of insects such as beetles. Trees that are being attacked by beetles and other insects will often produce defensive resin flows and the majority of New Jersey amber, about 70%, is grouped by the 2011 study as such. The authors indicated that fire-damaged resin specimens, ones with bubble froth and burned wood debris inclusions, were rare. [11] Description of a fossil Ptinidae beetle in 2015 has added more evidence for the possible insect origin of the resin production. [12]

Taxa

Fungi

Plantae

Tardigrades

Arachnids

Insects

Blattodea

Coleoptera

Dipterans

Ephemeroptera

Hemiptera

Hymenopterans

Formicidae

Mantodea

Neuroptera

Psocopterans

Raphidioptera

Trichoptera

Vertebrata

Aves genus and species indeterminate [1]

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<span class="mw-page-title-main">Diapriidae</span> Family of wasps

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<i>Sphecomyrma</i> Extinct genus of ants

Sphecomyrma is an extinct genus of ants which existed in the Cretaceous approximately 79 to 92 million years ago. The first specimens were collected in 1966, found embedded in amber which had been exposed in the cliffs of Cliffwood, New Jersey, by Edmund Frey and his wife. In 1967, zoologists E. O. Wilson, Frank Carpenter and William L. Brown, Jr. published a paper describing and naming Sphecomyrma freyi. They described an ant with a mosaic of features—a mix of characteristics from modern ants and aculeate wasps. It possessed a metapleural gland, a feature unique to ants. Furthermore, it was wingless and had a petiole which was ant-like in form. The mandibles were short and wasp-like with only two teeth, the gaster was constricted, and the middle and hind legs had double tibial spurs. The antennae were, in form, midway between the wasps and ants, having a short first segment but a long flexible funiculus. Three additional species, S. canadensis, S. mesaki and S. nexa, were described in 1985, 2005, and 2024, respectively.

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<i>Plumalexius</i> Extinct genus of insects

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<i>Brownimecia</i> Cretaceous ant genus described from amber fossils

Brownimecia is an extinct genus of ants, the only genus in the tribe Brownimeciini and subfamily Brownimeciinae of the Formicidae. Fossils of the identified species, Brownimecia clavata and Brownimecia inconspicua, are known from the Middle Cretaceous to Late Cretaceous of North America. The genus is one of several ants described from Middle Cretaceous ambers of New Jersey. Brownimecia was initially placed in the subfamily Ponerinae, until it was transferred to its own subfamily in 2003; it can be distinguished from other ants due to its unusual sickle-like mandibles and other morphological features that makes this ant unique among the Formicidae. B. clavata is also small, measuring 3.43 millimetres (0.135 in), and a stinger is present in almost all of the specimens collected. The morphology of the mandibles suggest a high level of feeding specialization.

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References

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  7. ↑ Berry, E.W. (1911). The Flora of the Raritan Formation (PDF). Geological Survey of New Jersey.
  8. ↑ Johnson, C.; et al. (2001). "Acropyga and Azteca Ants (Hymenoptera: Formicidae) with Scale Insects (Sternorrhyncha: Coccoidea): 20 Million Years of Intimate Symbiosis" (PDF). American Museum Novitates (3335): 1–18. doi:10.1206/0003-0082(2001)335<0001:AAAAHF>2.0.CO;2. S2CID   55067700.
  9. 1 2 Gandolfo, M.A.; Nixon, K.C.; Crepet, W.L. (2004). "Cretaceous flowers of Nymphaeaceae and implications for complex insect entrapment pollination mechanisms in early angiosperms". Proceedings of the National Academy of Sciences of the United States of America. 101 (21): 8056–8060. Bibcode:2004PNAS..101.8056G. doi: 10.1073/pnas.0402473101 . PMC   419556 . PMID   15148371.
  10. ↑ Lubkin, S.H. (2003). "Paracupes svitkoi (Coleoptera: Cupedidae) a new species from the Cretaceous of New Jersey" (PDF). Acta Zoologica Cracoviensia. 46: 189–194.
  11. ↑ McKellar, R.C.; Wolfe, A.P.; Muehlenbachs, K.; Tappert, R.; Engel, M.S.; Cheng, T.; Sánchez-Azofeifa, G.A. (2011). "Insect outbreaks produce distinctive carbon isotope signatures in defensive resins and fossiliferous ambers". Proceedings of the Royal Society B: Biological Sciences. 278 (1722): 3219–3224. doi:10.1098/rspb.2011.0276. PMC   3169029 . PMID   21429925.
  12. 1 2 Peris, D.; Philips, T.K.; Delclòs, X. (2015). "Ptinid beetles from the Cretaceous gymnosperm-dominated forests". Cretaceous Research. 52, Part B: 440–452. Bibcode:2015CrRes..52..440P. doi:10.1016/j.cretres.2014.02.009.
  13. ↑ Hibbett, D.S.; Grimaldi, D.S.; Donoghue, M.J. (1997). "Fossil mushrooms from Miocene and Cretaceous ambers and the evolution of Homobasidiomycetes". American Journal of Botany. 84 (8): 981–991. doi: 10.2307/2446289 . JSTOR   2446289.
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  16. ↑ Klompen, H.; Grimaldi, D.A. (2001). "First Mesozoic Record of a Parasitiform Mite: a Larval Argasid Tick in Cretaceous Amber (Acari: Ixodida: Argasidae)". Annals of the Entomological Society of America. 94 (1): 10–15. doi: 10.1603/0013-8746(2001)094[0010:FMROAP]2.0.CO;2 .
  17. 1 2 3 4 5 Penney, D. (2002). "Spiders in upper cretaceous amber from New Jersey (Arthropoda: Araneae)". Palaeontology. 45 (4): 709–724. Bibcode:2002Palgy..45..709P. doi: 10.1111/1475-4983.00256 .
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  19. ↑ Vrsansky, P.; Grimaldi, D.A. (2003). "Jantaropterix taxonomy, in Umenocoleoidea – an amazing lineage of aberrant insects (Insecta, Blattaria)". AMBA Projekty. 7 (1): 28–29.
  20. ↑ Peris, D.; Háva, J. (2016). "New species from Late Cretaceous New Jersey amber and stasis in subfamily Attageninae (Insecta: Coleoptera: Dermestidae)". Journal of Paleontology. 90 (3): 1–8. Bibcode:2016JPal...90..491P. doi:10.1017/jpa.2016.51. S2CID   132461891.
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  22. ↑ Gusarov, V.I. (2000). "Mesotachyporus puer, a new genus and species of Cretaceous Tachyporinae (Coleoptera: Staphylinidae) from New Jersey amber". Studies on Fossils in Amber, with Particular Reference to the Cretaceous of New Jersey. Backhuys, Leiden. pp. 255–258.
  23. ↑ Chatzimanolis, S.; Newton, A.F.; Soriano, C.; Engel, M.S. (2013). "Remarkable Stasis in a Phloeocharine Rove Beetle from the Late Cretaceous of New Jersey (Coleoptera, Staphylinidae)". Journal of Paleontology. 87 (2): 177–182. Bibcode:2013JPal...87..177C. doi:10.1666/12-114.1. S2CID   131448042.
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  29. ↑ Grogan, W.L.; Szadziewski, R. (1988). "A new biting midge from Upper Cretaceous (Cenomanian) amber of New Jersey (Diptera: Ceratopogonidae)". Journal of Paleontology. 62 (5): 808–812. doi:10.1017/s0022336000019089. S2CID   250351574.
  30. 1 2 3 4 5 Borkent, A. "Further biting midges (Diptera: Ceratopogonidae) from Upper Cretaceous New Jersey amber". In Grimaldi, D.A. (ed.). Studies on Fossils in Amber, with Particular Reference to the Cretaceous of New Jersey. Backhuys, Leiden. pp. 453–472.
  31. 1 2 3 4 5 Blagoderov, V.A.; Grimaldi, D.A. (2004). "Fossil Sciaroidea (Diptera) in Cretaceous ambers, exclusive of Cecidomyiidae, Sciaridae, and Keroplatidae" (PDF). American Museum Novitates (3433): 1–76. doi:10.1206/0003-0082(2004)433<0001:fsdica>2.0.co;2. hdl:2246/2798. S2CID   82955647.
  32. ↑ Szadziewski, R.; Arillo, A.; Urbanek, A.; Sontag, E. (2016). "Biting midges of the extinct genus Protoculicoides Boesel from Lower Cretaceous amber of San Just, Spain and new synonymy in recently described fossil genera (Diptera: Ceratopogonidae)". Cretaceous Research. 58: 1–9. Bibcode:2016CrRes..58....1S. doi:10.1016/j.cretres.2015.09.016.
  33. ↑ Azar, D.; Salamé, Y. (2015). "A new genus of Sycoracinae (Diptera: Psychodidae) from Upper Cretaceous amber of New Jersey". Cretaceous Research. 52, Part B: 539–547. Bibcode:2015CrRes..52..539A. doi:10.1016/j.cretres.2014.05.002.
  34. ↑ Azar, D.; Mouawad, R.; Salamé, Y. (2015). "A new genus of Trichomyiinae (Diptera: Psychodidae) from Upper Cretaceous amber of New Jersey". Cretaceous Research. 52, Part B: 531–538. Bibcode:2015CrRes..52..531A. doi:10.1016/j.cretres.2014.02.014.
  35. 1 2 3 4 Sinitshenkova, N. D. "New Jersey amber mayflies: the first North American Mesozoic members of the order (Insecta; Ephemeroptera)". In Grimaldi, D.A. (ed.). Studies on Fossils in Amber, with Particular Reference to the Cretaceous of New Jersey. Backhuys, Leiden. pp. 111–125.
  36. ↑ Peters, W.L.; Peters, J.G. (2000). Grimaldi, D.A. (ed.). Discovery of a new genus of Leptophlebiidae: Leptophlebiinae (Ephemeroptera) in Cretaceous amber from New Jersey. Backhuys, Leiden. pp. 127–131.{{cite book}}: |work= ignored (help)
  37. 1 2 3 4 5 6 7 8 9 10 Vea, I.M.; Grimaldi, D.A. (2015). "Diverse New Scale Insects (Hemiptera: Coccoidea) in Amber from the Cretaceous and Eocene with a Phylogenetic Framework for Fossil Coccoidea". American Museum Novitates (3823): 1–80. doi:10.1206/3823.1. hdl:2246/6575. S2CID   73702369.
  38. ↑ Wegierek, P. (2000). "A new genus and species of aphid (Hemiptera: Aphidinea) from New Jersey amber". In Grimaldi, D.A. (ed.). Studies on Fossils in Amber, with Particular Reference to the Cretaceous of New Jersey. Backhuys, Leiden. pp. 141–145.
  39. ↑ Ouvrard, D.; Burckhardt, D.; Azar, D.; Grimaldi, D (2010). "Non-jumping plant-lice in Cretaceous amber (Hemiptera: Sternorrhyncha: Psylloidea)". Systematic Entomology. 35 (1): 172–180. doi:10.1111/j.1365-3113.2009.00499.x. S2CID   85347000.
  40. ↑ Shcherbakov, D.E. (2007). "An extraordinary new family of Cretaceous planthoppers (Homoptera: Fulgoroidea)". Russian Entomological Journal. 16 (2): 138–154.
  41. ↑ Grimaldi, D.A. (2003). "First amber fossils of the extinct family Protopsyllidiidae, and their phylogenetic significance among Hemiptera". Insect Systematics & Evolution. 34 (3): 329–344. doi:10.1163/187631203788964746.
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