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D. baculatus Ibrahim (1996) D. echinosporus R.Potonié (1954) D. major Krutzsch (1970) D. parvus Dutta & Sah (1970) D. senonicus Jardiné & Magloire (1965) D. spinosus (type) (Cookson) R.Potonié (1960)

Droseridites
Droseridites
is a genus of extinct plants of possible droseracean or nepenthacean affinity. It is a form taxon known only from fossil pollen. Species
Species
assigned to this genus originate from numerous regions of the world, including Europe
Europe
(from France
France
to the Caucasus),[1] India,[2] Egypt,[3] the Arabian Peninsula,[4] and the Kerguelen Islands.[5] This genus is characterised by inaperturate and spinose pollen grains that are united in loose tetrahedral tetrads (groups of four). The grains are prolate, striate, and tricolpate. The colpi are slender and long, whereas the striae are very fine, densely packed, and situated parallel to the polar axis.[6] Species[edit] Droseridites
Droseridites
spinosus, the type species, has been recorded from the Tertiary of the Kerguelen Islands[4] and the Miocene
Miocene
of India, including the Warkalli Formation (Bharathi and Kundra Clay Mines, Kerala) and the Sindhudurg Formation (Mavli Mine at Redi, Sindhudurg District, Maharashtra).[2] It is of possible nepenthacean affinity.[5] Specimens identified in the literature as D. cf. spinosus have also been reported from Hungarian Miocene
Miocene
deposits.[4] Droseridites
Droseridites
baculatus was described from the Ghazalat-1 Well, Qattara Depression, Egypt.[3] Droseridites
Droseridites
echinosporus has been recorded from European Tertiary strata and is a member of a group of similar species that have been interpreted as belonging to the genus Nepenthes.[1] Sites for D. major, a possible nepenthacean species,[1] include the Tertiary of Europe[1] and the Palaeocene-early Eocene
Eocene
Rekmangiri Coalfield of Garo Hills, Meghalaya, India.[2] Droseridites
Droseridites
parvus was originally described from the lower Eocene Cherry Formation of Assam, India.[4] It has also been recorded from the Palaeocene
Palaeocene
Tura Formation of the "Retialetes emendatus zone" in Assam[4] and the Oligocene- Neogene
Neogene
Dharmsala and Siwalik (Dharmsala and Nurpur areas, Kangra District, Himachal Pradesh).[2] The species is characterised by wart-like sculpturing and is "presently impossible to interpret".[4] Pollen
Pollen
matching the description of D. senonicus has been found in formations of the Arabian Peninsula
Arabian Peninsula
dating to as early as the Middle Cretaceous
Cretaceous
to late Upper Cretaceous, and it has been suggested that this species may represent an early palm taxon.[4] Unidentified Droseridites
Droseridites
palynomorphs have been recorded from numerous sites in India, including the Miocene
Miocene
Cuddalore Formation (Neyveli Lignitefield, Tamil Nadu), the Palaeocene
Palaeocene
Tura Formation (Langrin Coalfield, Khasi Hills, Meghalaya), the Palaeocene
Palaeocene
Seam No. 1 (Rekmangiri Coalfield, Garo Hills, Meghalaya), and the Oligocene- Neogene
Neogene
Dharmsala and Siwalik.[2] Taxonomy[edit] Pollen
Pollen
of a number of species originally described under the genus Droseridites
Droseridites
has been tentatively assigned to Nepenthes. In 1985, Wilfried Krutzsch transferred three species of the "D. echinosporus group", creating the new combinations Nepenthes echinatus, N. echinosporus, and N. major.[1][7][8] However, at more than 40 µm in diameter, the tetrads of D. major are larger than those of any known extant Nepenthes, and within the lower range of extant Drosera
Drosera
tetrads.[8] Pollen
Pollen
from the Kerguelen Islands originally described as D. spinosus has also been interpreted as belonging to Nepenthes.[5][9] Some authors consider D. major and D. parvus as synonyms of Nepenthidites laitryngewensis of the Palaeocene
Palaeocene
Lakadong Sandstone in Laitryngew, Khasi Hills, Meghalaya, India.[10][2] References[edit]

^ a b c d e Krutzsch, W. 1985. Über Nepenthes- Pollen
Pollen
im europäischen Tertiär. Gleditschia 13: 89–93. ^ a b c d e f Saxena, R.K. & G.K. Trivedi 2006. "A Catalogue of Tertiary Spores and Pollen
Pollen
from India" (PDF).  Birbal Sahni Institute of Palaeobotany, Lucknow. ^ a b Ibrahim, M.I.A. 1996. Aptian-Turonian palynology of the Ghazalat-1 Well (GTX-1), Qattara Depression, Egypt. Review of Palaeobotany and Palynology 94(1–2): 137–168. doi:10.1016/0034-6667(95)00135-2 ^ a b c d e f g Ehrendorfer, F. 1989. Woody Plants—Evolution and Distribution Since the Tertiary. Springer-Verlag, Vienna. ^ a b c Meimberg, H., A. Wistuba, P. Dittrich & G. Heubl 2001. Molecular phylogeny of Nepenthaceae based on cladistic analysis of plastid trnK intron sequence data. Plant
Plant
Biology (Stuttgart) 3(2): 164–175. doi:10.1055/s-2001-12897 ^ Baksi, S.K. & U. Deb 1976. On Mulleripollis gen. nov., a pollen tetrad from the Upper Cretaceous
Cretaceous
of the Bengal Basin, West Bengal, India. Review of Palaeobotany and Palynology 22(1): 73–77. doi:10.1016/0034-6667(76)90012-9 ^ Krutzsch, W. 1989. Paleogeography and historical phytogeography (paleochorology) in the Neophyticum. Plant
Plant
Systematics and Evolution 162(1–4): 5–61. doi:10.1007/BF00936909 ^ a b Cheek, M.R. & M.H.P. Jebb 2001. Nepenthaceae. Flora Malesiana 15: 1–157. ^ Heubl, G., G. Bringmann & H. Meimberg 2006. Molecular phylogeny and character evolution of carnivorous plant families in Caryophyllales
Caryophyllales
— revisited. Plant
Plant
Biology 8(6): 821–830. doi:10.1055/s-2006-924460 ^ Kumar, M. 1995. Pollen
Pollen
tetrads from Palaeocene
Palaeocene
sediments of Meghalaya, India: comments on their morphology, botanical affinity and geological records. Palaeobotanist 43(1): 68–81.

v t e

Carnivorous and protocarnivorous plants

Carnivorous genera († extinct)

Aldrovanda †Archaeamphora Brocchinia Byblis Catopsis Cephalotus Darlingtonia Dionaea Drosera †Droserapites †Droserapollis †Droseridites Drosophyllum †Fischeripollis Genlisea Heliamphora Nepenthes †Palaeoaldrovanda Philcoxia Pinguicula Roridula Sarracenia †Saxonipollis Triphyophyllum Utricularia

Protocarnivorous genera

Aracamunia Capsella Colura Dipsacus Drymocallis Geranium Ibicella Lathraea Paepalanthus Passiflora Plumbago Proboscidea Stylidium

See also

International Carnivorous Plant
Plant
Society Insectivorous Plant
Plant
Society List of carnivorous plants List of carnivorous plant periodicals Pitcher plant

Taxon identifiers

Wd: Q5308571 Fossilworks: 32

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