Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India
The genus Surangea Chitaley et Sheikh, based on permineralized specimens from the Deccan Intertrappean Beds of central India, was originally considered to represent a fern megasporangium. Reexamination of original material and new specimens has revealed that the structures are capsular fruits with...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
W. Szafer Institute of Botany, Polish Academy of Sciences
2022-12-01
|
| Series: | Acta Palaeobotanica |
| Subjects: | |
| Online Access: | https://acpa.botany.pl/Angiosperm-affinities-of-Surangea-from-the-late-Cretaceous-Deccan-Intertrappean-Beds,157272,0,2.html |
| _version_ | 1797962895743516672 |
|---|---|
| author | Deepak Ramteke Selena Y. Smith Dashrath K. Kapgate Edward L. Stanley Steven R. Manchester |
| author_facet | Deepak Ramteke Selena Y. Smith Dashrath K. Kapgate Edward L. Stanley Steven R. Manchester |
| author_sort | Deepak Ramteke |
| collection | DOAJ |
| description | The genus Surangea Chitaley et Sheikh, based on permineralized specimens from the Deccan Intertrappean
Beds of central India, was originally considered to represent a fern megasporangium. Reexamination
of original material and new specimens has revealed that the structures are capsular fruits with well-defined
seeds, rather than megasporangia. We describe Surangea fruits in detail, based on peels and micro-CT scanning,
and document its distribution among multiple localities of the Deccan Intertrappean Beds. The fruits are
pentacarpellate septicidal capsules with ~8–12 seeds per locule. The seeds are prominently ornamented with
parallel ridges and have a curved embryo/endosperm cavity and a prominent aril. This set of features indicates
eudicotyledonous affinities for Surangea . In particular, the combination of septicidal capsules, axile placentation
and arillate campylotropus seeds suggests affinity with the order Myrtales, but it does not fit cleanly within an
extant family. Surangea fruits add to the diversity of angiosperms known from this late Maastrichtian flora. It
joins several other fruit types known from the Deccan flora that do not fall neatly into extant families, possibly
representing parts of an endemic community that succumbed to environmental stress associated K-Pg boundary
events and/or subsequent northward rafting of the Indian subcontinent. |
| first_indexed | 2024-04-11T01:19:55Z |
| format | Article |
| id | doaj.art-cad3958fc8e14b39ba7b7305d8207d64 |
| institution | Directory Open Access Journal |
| issn | 2082-0259 |
| language | English |
| last_indexed | 2024-04-11T01:19:55Z |
| publishDate | 2022-12-01 |
| publisher | W. Szafer Institute of Botany, Polish Academy of Sciences |
| record_format | Article |
| series | Acta Palaeobotanica |
| spelling | doaj.art-cad3958fc8e14b39ba7b7305d8207d642023-01-03T11:32:19ZengW. Szafer Institute of Botany, Polish Academy of SciencesActa Palaeobotanica2082-02592022-12-0162219620410.35535/acpa-2022-0013157272Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central IndiaDeepak Ramteke0Selena Y. Smith1Dashrath K. Kapgate2Edward L. Stanley3Steven R. Manchester4Gondia Education Society High School and Junior College, Mohadi. Dist., Gondia, 4416014-M.S., IndiaDepartment of Earth & Environmental Sciences and Museum of Paleontology, University of Michigan, Ann Arbor, MI, 48019, USADepartment of Botany, J. M. Patel College, Bhandara-441904, IndiaFlorida Museum of Natural History, University of Florida, Gainesville, FL, 32611-7800, USAFlorida Museum of Natural History, University of Florida, Gainesville, FL, 32611-7800, USAThe genus Surangea Chitaley et Sheikh, based on permineralized specimens from the Deccan Intertrappean Beds of central India, was originally considered to represent a fern megasporangium. Reexamination of original material and new specimens has revealed that the structures are capsular fruits with well-defined seeds, rather than megasporangia. We describe Surangea fruits in detail, based on peels and micro-CT scanning, and document its distribution among multiple localities of the Deccan Intertrappean Beds. The fruits are pentacarpellate septicidal capsules with ~8–12 seeds per locule. The seeds are prominently ornamented with parallel ridges and have a curved embryo/endosperm cavity and a prominent aril. This set of features indicates eudicotyledonous affinities for Surangea . In particular, the combination of septicidal capsules, axile placentation and arillate campylotropus seeds suggests affinity with the order Myrtales, but it does not fit cleanly within an extant family. Surangea fruits add to the diversity of angiosperms known from this late Maastrichtian flora. It joins several other fruit types known from the Deccan flora that do not fall neatly into extant families, possibly representing parts of an endemic community that succumbed to environmental stress associated K-Pg boundary events and/or subsequent northward rafting of the Indian subcontinent.https://acpa.botany.pl/Angiosperm-affinities-of-Surangea-from-the-late-Cretaceous-Deccan-Intertrappean-Beds,157272,0,2.htmlarillate seedsmaastrichtianmohgaonkalanpentapetalaepentalocular septicidal capsule |
| spellingShingle | Deepak Ramteke Selena Y. Smith Dashrath K. Kapgate Edward L. Stanley Steven R. Manchester Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India Acta Palaeobotanica arillate seeds maastrichtian mohgaonkalan pentapetalae pentalocular septicidal capsule |
| title | Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India |
| title_full | Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India |
| title_fullStr | Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India |
| title_full_unstemmed | Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India |
| title_short | Angiosperm affinities of Surangea from the late Cretaceous Deccan Intertrappean Beds of central India |
| title_sort | angiosperm affinities of surangea from the late cretaceous deccan intertrappean beds of central india |
| topic | arillate seeds maastrichtian mohgaonkalan pentapetalae pentalocular septicidal capsule |
| url | https://acpa.botany.pl/Angiosperm-affinities-of-Surangea-from-the-late-Cretaceous-Deccan-Intertrappean-Beds,157272,0,2.html |
| work_keys_str_mv | AT deepakramteke angiospermaffinitiesofsurangeafromthelatecretaceousdeccanintertrappeanbedsofcentralindia AT selenaysmith angiospermaffinitiesofsurangeafromthelatecretaceousdeccanintertrappeanbedsofcentralindia AT dashrathkkapgate angiospermaffinitiesofsurangeafromthelatecretaceousdeccanintertrappeanbedsofcentralindia AT edwardlstanley angiospermaffinitiesofsurangeafromthelatecretaceousdeccanintertrappeanbedsofcentralindia AT stevenrmanchester angiospermaffinitiesofsurangeafromthelatecretaceousdeccanintertrappeanbedsofcentralindia |