PBDB Collection

Nancowry Island (Neogene of India)

Where: Andaman and Nicobar Islands, India (8.0° N, 93.6° E: paleocoordinates 2.2° N, 97.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Neogene (23.0 - 2.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marginal marine; lithology not reported

Size class: microfossils

Primary reference: R. N. Lakhanpal, H. K. Maheshwari, and N. Awasthi. 1976. A Catalogue of Indian Fossil Plants. 1-318 [B. Allen/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 224619: authorized by Bethany Allen, entered by Bethany Allen on 24.03.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Bacillariophyceae
Fragilariales - Fragilariaceae	Fragilaria nankoorensis, Podocystis spathulata Fragilaria nankoorensis diatom Podocystis spathulata diatom
Cymatosirales - Cymatosiraceae	Rossiella paleacea Rossiella paleacea diatom
Centrales - Eupodiscaceae	Eupodiscus jonesianus, Triceratium antedeluvianum, Triceratium arcticum, Triceratium braeckii, Triceratium cancellatum, Triceratium cinnamomeum, Triceratium concinum, Triceratium distinctum, Triceratium favus, Triceratium fimbriatum, Triceratium grande, Triceratium madagascarense, Triceratium megastomum, Triceratium moronense, Triceratium nankoorense, Triceratium nicobaricum, Triceratium obscurum, Triceratium quinquelobatum, Triceratium receptum Eupodiscus jonesianus diatom Triceratium antedeluvianum diatom Triceratium arcticum diatom var. typica, pentagona, trigona Triceratium braeckii diatom Triceratium cancellatum diatom Triceratium cinnamomeum diatom Triceratium concinum diatom Triceratium distinctum diatom Triceratium favus diatom Triceratium fimbriatum diatom Triceratium grande diatom Triceratium madagascarense diatom Triceratium megastomum diatom Triceratium moronense diatom var. nicobarica Triceratium nankoorense diatom Triceratium nicobaricum diatom Triceratium obscurum diatom Triceratium quinquelobatum diatom Triceratium receptum diatom
Naviculales - Naviculaceae	Navicula forcipata, Navicula formosa, Navicula gemmata, Navicula henedeyi, Navicula praetexta, Navicula prisca, Navicula pusilla, Navicula lyra, Orthoneis barbadensis Navicula forcipata diatom var. nankoorensis Navicula formosa diatom Navicula gemmata diatom var. biseriata Navicula henedeyi diatom Navicula praetexta diatom Navicula prisca diatom Navicula pusilla diatom Navicula lyra Ehrenberg 1843 diatom Orthoneis barbadensis diatom var. nankoorensis
Naviculales - Diploneidaceae	Diploneis campylodiscus, Diploneis interrupta Diploneis campylodiscus diatom Diploneis interrupta diatom
Stictodiscales - Stictodiscaceae	Stictodiscus californicus, Stictodiscus nankoorensis, Stictodiscus novarae, Stictodiscus rota Stictodiscus californicus diatom var. typica, aggregata Stictodiscus nankoorensis diatom Stictodiscus novarae diatom Stictodiscus rota diatom
- Aulacodiscaceae	Aulacodiscus amoenus, Aulacodiscus angulatus, Aulacodiscus argus, Aulacodiscus kittoni, Aulacodiscus macreaenus, Aulacodiscus orientalis, Aulacodiscus parvulus, Aulacodiscus scaber, Aulacodiscus crux Aulacodiscus amoenus diatom Aulacodiscus angulatus diatom Aulacodiscus argus diatom Aulacodiscus kittoni diatom var. typica, johnsonii Aulacodiscus macreaenus diatom Aulacodiscus orientalis diatom Aulacodiscus parvulus diatom Aulacodiscus scaber diatom Aulacodiscus crux Ehrenberg 1844 diatom
Melosirales - Endictyaceae	Endictya oceanica Endictya oceanica Ehrenberg 1845 diatom
Melosirales - Melosiraceae	Podosira argus Podosira argus diatom
Melosirales - Stephanopyxidaceae	Stephanopyxis minuta, Stephanopyxis nankoorensis, Stephanopyxis pandura, Stephanopyxis turris Stephanopyxis minuta diatom Stephanopyxis nankoorensis diatom Stephanopyxis pandura diatom Stephanopyxis turris Greville and Arnot 1857 diatom
Bacillariales - Bacillariaceae	Denticula nicobarica Denticula nicobarica diatom
Bacillariales -	Syringidium americanum Syringidium americanum diatom
Mastogloiales - Mastogloiaceae	Mastogloia splendida Mastogloia splendida diatom
Tabellariales - Tabellariaceae	Gephyria media, Climacosira mirifica Gephyria media diatom var. typica, ornata Climacosira mirifica diatom
Coscinodiscales - Coscinodiscaceae	Coscinodiscus biangulatus, Coscinodiscus interlineatus, Coscinodiscus leptopus, Coscinodiscus lewisianus, Coscinodiscus nodulifer, Coscinodiscus odontodiscus, Coscinodiscus ovalis, Coscinodiscus partitus, Coscinodiscus plicatus, Coscinodiscus rex, Coscinodiscus robustus, Coscinodiscus superbus, Coscinodiscus lineatus, Coscinodiscus curvatulus, Coscinodiscus punctatus, Coscinodiscus gigas, Coscinodiscus radiatus, Coscinodiscus vetustissimus, Coscinodiscus subtilis, Coscinodiscus marginatus, Coscinodiscus ellipticus, Coscinodiscus minor, Coscinodiscus excentricus, Craspedodiscus insignis, Craspedodiscus nicobaricus, Craspedodiscus coscinodiscus Coscinodiscus biangulatus diatom Coscinodiscus interlineatus diatom Coscinodiscus leptopus diatom Coscinodiscus lewisianus diatom Coscinodiscus nodulifer diatom Coscinodiscus odontodiscus diatom var. subsubtilis Coscinodiscus ovalis diatom Coscinodiscus partitus diatom Coscinodiscus plicatus diatom Coscinodiscus rex diatom Coscinodiscus robustus diatom Coscinodiscus superbus diatom Coscinodiscus lineatus Ehrenberg 1839 diatom Coscinodiscus curvatulus Grunow 1878 diatom var. minor Coscinodiscus punctatus Ehrenberg 1839 diatom Coscinodiscus gigas Ehrenberg 1839 diatom Coscinodiscus radiatus Ehrenberg 1841 diatom var. typica, minor Coscinodiscus vetustissimus Pantocsek 1886 diatom Coscinodiscus subtilis Ehrenberg 1839 diatom Coscinodiscus marginatus Ehrenberg 1839 diatom Coscinodiscus ellipticus Ehrenberg 1839 diatom Coscinodiscus minor Ehrenberg 1839 diatom Coscinodiscus excentricus Ehrenberg 1839 diatom Craspedodiscus insignis diatom Craspedodiscus nicobaricus diatom Craspedodiscus coscinodiscus Ehrenberg 1845 diatom var. typica, nankoorensis
Coscinodiscales - Heliopeltaceae	Auliscus caelatus, Auliscus pruniosus, Auliscus stockhardtii, Actinoptychus capensis, Actinoptychus pulchellus, Actinoptychus splendens, Actinoptychus undulatus, Actinoptychus wittianus Auliscus caelatus diatom var. major, rhipis Auliscus pruniosus diatom Auliscus stockhardtii diatom Actinoptychus capensis diatom Actinoptychus pulchellus diatom Actinoptychus splendens diatom Actinoptychus undulatus diatom Actinoptychus wittianus diatom
Triceratiales - Plagiogrammaceae	Glyphodesmis nancoorense, Plagiogramma nankoorense, Plagiogramma polygibbum Glyphodesmis nancoorense diatom Plagiogramma nankoorense diatom Plagiogramma polygibbum diatom
Asterolamprales - Asterolampraceae	Asteromphalus nankoorensis, Asteromphalus variabilis, Asterolampra affinis, Asterolampra ambigua, Asterolampra dubia, Asterolampra grevillei, Asterolampra nicobarica, Asterolampra marylandica Asteromphalus nankoorensis diatom Asteromphalus variabilis diatom Asterolampra affinis diatom Asterolampra ambigua diatom Asterolampra dubia diatom Asterolampra grevillei diatom Asterolampra nicobarica diatom Asterolampra marylandica Ehrenberg 1844 diatom
Eunotiales - Eunotiaceae	Euodia gibba Euodia gibba Bailey 1861 diatom
Striatellales - Striatellaceae	Grammatophora lyrata Grammatophora lyrata diatom
- Hemidiscaceae	Actinocyclus ovalis, Actinocyclus ellipticus, Actinocyclus ehrenbergii Actinocyclus ovalis diatom Actinocyclus ellipticus Grunow 1883 diatom Actinocyclus ehrenbergii Ralfs 1953 diatom
Achnanthales - Cocconeidaceae	Campyloneis grevillei, Cocconeis dirupta, Cocconeis pellucida Campyloneis grevillei diatom Cocconeis dirupta diatom var. sigma Cocconeis pellucida diatom var. typica, nankoorensis
Arachnoidiscales - Arachnoidiscaceae	Arachnoidiscus ehrenbergii, Arachnoidiscus indicus Arachnoidiscus ehrenbergii diatom Arachnoidiscus indicus diatom
Isthmia
- Biddulphiaceae	Isthmia enervis Isthmia enervis var. typica, nankoorensis
Hemiaulus
- Biddulphiaceae	Hemiaulus ornithocephalus, Hemiaulus polymorphus Hemiaulus ornithocephalus var. nicobaricus Hemiaulus polymorphus Grunow 1884
Pleurosigma
-	Pleurosigma angulatum, Pleurosigma batticum, Pleurosigma nicobaricum Pleurosigma angulatum Pleurosigma batticum Pleurosigma nicobaricum
Chrysophyceae
Phytomastigophora - Dictyochaceae	Distephanus crux, Distephanus speculum, Mesocena polymorpha, Dictyocha siderea, Dictyocha fibula, Cannopilus hemisphaericus Distephanus crux Ehrenberg 1840 var. typica, octacanthus Distephanus speculum Ehrenberg 1839 Mesocena polymorpha var. quadrangula, triangula Dictyocha siderea var. quadrata Dictyocha fibula Ehrenberg 1838 var. typica, rhombica Cannopilus hemisphaericus