000			02278nab a2200313 a 4500
003			AR-ReUNN
005			20260702003329.0
008			260630s2007 ag |||||||||||||||||eng
041	0		_aeng
100	1		_aRapini, Alessandro _9155398
700	1		_aGoyder, David J. _9155430
700	1		_aKonno, Tatiana u. P. _9155432
700	1		_aFarinaccio, Maria Ana _9155433
245	1	0	_aProgress in asclepiad taxonomy: species numbers in Brazilian Asclepiadoideae (Apocynaceae) through time / A. Rapini [et al.]
264		1	_c2007
300			_a5 páginas
500			_adiagr.
520			_aMany have tried to estimate the number of species of organism already described, and those still awaiting description. A recent quantification of the species of asclepiad (Apocynaceae) increased the traditionally accepted totals of 2.000 - 2.500 to more than 3.000, 15 % of which were described only in the 1990s - it was argued from this that the number of asclepiads could continue to rise to 4.000 species. We tracked the change in the number of Brazilian Asclepiadoideae (with type specimens from Brazil) by evaluating the difference between new species and synonyms. Of the 585 species described from Brazil, more than 35 % are currently treated as synonyms and more than 10 % of the rremaining currently accepted names are potential synonyms. The greatest increase of species number in Brazilian Asclepiadoideae took place during the 19th century. Since the middle of 20th century, the number of accepted species started to decrease. The adoption of the type method in botanical nomenclature since 1935 is probably the main reason for such a change. The 1990s showed a slight increase in the number of accepted species, but this comes at the end of a half-century of overall decline. Trends on the numbers of species may vary according to the period examined, therefore estimates based on trends of just one 10-year period should be viewed with caution.
650		4	_aAsclepiadaceae _9116203
650		4	_aSistematica _9123022
650		4	_aNomenclatura _929025
650		4	_aTaxonomía _96308
650		4	_aFlora _92055
650		4	_aBrasil _94626
773	0		_tKew Bulletin _x0075-5974 _gv. 60 n. 1 (2005) _w238854
942			_cART
035			_a(IBONE)41381
001			239689
999			_c239689 _d239689
040			_aAR-ReUNN _bspa _cAR-ReUNN _eaacr2