Studies in the Glossopteris flora of India - 16. Dadoxylon jamudhiense, a new species of fossil wood from the Raniganj stage of Jharia coalfield, Bihar

Abstract

A new species of fossil wood, Dadoxylon jamudhiense, is described from the Raniganj stage of Jharia coalfield, Bihar. The wood is distinguished by the presence of a large percentage of partly biseriate xylem rays, 1-2 or 3 seriate, alternate or opposite, mostly circular radial pits and 1-4-simple and broadly oval to circular pits in the cross-field.

Coniferous Fossil Woods from the Jogyeri Formation (Upper Triassic) of the Nampo Group, Korea

“…Our specimens have 1-3 rows (usually 2 or 3 rows) of pits on the radial tracheid walls, 3-6 araucarioid pits per cross-field, and rays that are 1-15 (usually 6-10) cells high. Twenty-four species of Araucarioxylon (or Dadoxylon) which have 1-3 rows of pits on the radial tracheid walls have been reported (Shimakura 1936;Ogura 1944;Surange & Sah 1956;Veillet-Bartoszewska 1956;Kräusel & Jain 1963;Sah & Jain 1963;Maheshwari 1963Maheshwari , 1964Maithy 1964;Vogellehner 1965;Boureau & Koeniguer 1966;Lemoigne & Demarcq 1967;Japiassu 1970;Desplats 1976;Prasad 1982;Roselt 1986;Giraud 1991;Nishida et al 1993). Among them seven species have usually 3-6 pits per cross-field (D. duartei, D.…”

Studies in the Glossopteris Flora of India - 19. Two new species of Dadoxylon from the Lower Gondwanas of India

“…Dadoxylon parbeliense Rao (1935) is distinguished from Dadoxylon gondwanense by the presence of rows of separately placed pits and low height of the medullary rays. Dadoxylon jamudhiense Maheshwari (1964) is distinguished by the absence of growth rings and the radial tracheid wall pitting is from 1-3 seriate only. The South African Dadoxylas, i.e., Dadoxylon rangei Krausel (1928) and Dadoxylon porosum Krausel (1928) resembles by the presence of several pits in the cross-field, but is distinguished in having strictly uniseriate medullary rays and low height of the medullary rays.…”

“…Three species, viz. Dadoxylon zalesskyi Sahni (1932), Dadoxylon parbeliense Rao (1935) and Dadoxylon jamudhiense Maheshwari (1964) have been recorded from the Raniganj Stage. The rest four species Dadoxylon indicu1n Holden (1917), Dadoxylon bengalense Holden (1917), Dadoxylon barakarense Surange and Saxena (1959) and Dadoxylon parenchymosum Surange & Maithy (1963) are known from the Barakar Stage.…”

Studies in the Glossopteris Flora of India - 24. On two new species of fossil wood from the Raniganj stage of Raniganj Coalfield, Bengal

“…THE knowledge of petrified woods from the Raniganj stage of the Lower Gondwanas of India is very meagre, only three species being known so far, viz., Dadoxylon zalesskyi (SAHNI,1932), D. parbeliense (RAO, 1935) and D. jamudhiense (MAHESHWARI, 1964). The present fossil woods were collected from two collieries in the eastern sector of the Raniganj coalfield, Bengal and as such belong to the Raniganj stage (Upper Permian).…”