A Note on the Geographic and Stratigraphic Distribution of Jllrinodendron in China

PalaeobolalliH 53(2004) . /7-20 0031-017412004/17-20 $2.00

A note on the geographic and stratigraphic. distribution ofJurinodendron in China

ZHUO FENGI PING LP, GUANGLONG SHEN 1 AND JUN WANG2

IDepartmellt of Geology, Northwest University, Xi'an 710069, PR China. ?Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing 210008, PR China.

(Received 07 July 2003; revised version accepted 20 May 2004)

ABSTRACT

Feng, Li, Shen & Wang 2004. A note on the geographic and stratigraphic distribution of Jllrinodendron in China. Palaeobotanist53 (1-3): 17-20.

Cyclosligma. Haughton ex. Heer 1871, which is a homonym of modern botany, should be abandoned. Doweld proposed Jurinodendron Doweld to replace it. This paper shows the geographic and stratigraphic distribution of Jurinodendron in P.R. China, which adds to the current knowledge of the distribution of Jllrinodendron Doweld and its significance as acosmopolitan taxon.

Key-words-Jllrinodendron, homonym, geographic and stratigraphic distribution, P.R. China.

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INTRODUCTION Cyclostigma Philippi, 1870 (Solanaceae Juss.). In accordance with the rules of the International Code of Botanical URING the study of nomenclature of fossil plants, the Nomenclature (ICBN), Doweld proposed a new generic name, DRussian palaeobotanist Doweld (200 I) found that the lurinodendron, to replace the palaeobotanical application of generic name Cyclostigma, for the widely spread Cyclostigma. He futher summed up the geographic and Lepidodendron-like fossil remains of the late Devonian, was a stratigraphic distribution of all the known species of this genus. homonym of several modern plant taxa Cyclostigma However, there was no reference quote from Chinese material Hochstetter ex Endlicher, 1842 (Apocynaceae Juss.), in Doweld's publication of the cosmopolitan lurinodendron Cyclostigma Klotzsch, 1853 (Euphorbiaceae Juss.), and Doweld, 200 I.

The genus Cyclostigma was first used by Haughton (1860 a, b, c) to describe certain Lepidodendron-like fossil plants ~~ l' r "'--'r --.-t~+rr _J" from Kiltorcan Hill, County Kilkenny and elsewhere in the ' ---....-~ , ~---J. Upper Old Sandstone of Ireland. Nonetheless, Haughton did ,:' i \. 'r- I -'oJ, . ". " .. ,.[. I • < ••• " -1 , ~ not follow the requirements of the ICBN to validate this new , r ..) J ••.• .+- ~ generic name. Heer (187 I) was the first author who attended ' r-,. II [" •.. "'..• \.._. \ -.,.~' ,~';'~'~..' \ L. .."'"'" _ ,.•. _-I " all the requirements for the valid publication ofthe new generic name for lepidodendrophytes. Hereafter, Cyclostigma was \ . Co':,:: :...:.;.'/::': ~ \ ~ ,. .'. '\ •. ," .. Ill"~"~.. '~"'. _ recommended by several palaeobotanical masters (Schimper, "_ .. ::". ,: . ..~:.~- 1874; Kidston, 1886). Further study and examination of the 'J.. :.;,' - .. _ .:.t,.-- -- ...I r···..,.~,'....:'t"t: J systematic position and relationship of the genus Cyclostigma I 'I. ...~.,,.. .,. ~. :J /. to certain other groups is somewhat problematic. Since more " ·li·.....""").,-::,....;. "I~'fl/"/1' '.-, _.". ;'C .•. " ~[. ., •... -'. II,- l, ..... " .... l!. ._/ II", and more fossils were collected from different localities and ' I...~...... /" _- with different degree of preservation, many palaeobotanists -.I..." -.... I.----, ',.-_ -X~,-.(-r-__ 1'- r (Weiss & Sterzel, 1893; Kidston, 1903; Seward, 1910; Jongmans, I 1913; Gothan, 1923; Hirmer, 1927; Crookall, 1939) referred to Cyclostigma as Pinakodendron Weiss, while Nathorst (1894, Fig. J-Map showing rhe geographic distribution of Jurinodendron in 1902) and Johnson (1913) regarded Cyclostigma as belonging China. to Bothrodendron, and combined these two genera with Bothrodendron. Tchirkova-Zalessky (1957, to see Cai & Wu, palaeogeographic distribution of Jurinodendron, we present 1994) considered Cyclostigma as a subgenus of here the geographic and stratigraphic distribution of the genus Bothrodendron, thus used the notation "Bothrodendron in China (Figs 1& 2). (Cyclostigma)". The late Chinese palaeobotanist Sze (1952, 1953) pointed out that Cyclostigma possess a Iigular pit, whilst Bothrodendron is without a ligular pit, hence these two genera Acknowledgements-We lhank Dr Qin Han (Thomas C. Hicks) should not be merged as a single genus. A generic homonym for checking lhe language oflhe manuscripl. This projecl isjinanciallv was noticed by Potonie (190 I), who proposed to preserve the stlpp0rled by Naliollal Science FOtlndalion Grall/ 40102002. generic names, automatically adding the prefix p- (p Cyclostigma: Potonie, 1901). 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Guangdong Province Guangzhou Dasha Village Heshuigang Fm D3 II Fang, 1965 -0 Kaiping, Shaoguan. YJngde, Renhua Maozifeng Fm D3 II Cai & Wang, 1995

Fig. 2-The geographic and the stratigraphic distribution of Ju,.illod~lId"oll in China. (0 , The Middle Devonian. 0 , The Upper Devonian). 2 3 20 THE PALAEOBOTANIST

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