DISTRIBUTION AND SYSTEMATICS OF THE FRESHWATER GENUS TUOMEYA (RHODOPHYTA, BATRACHOSPERMACEAE) 1
DISTRIBUTION AND SYSTEMATICS OF THE FRESHWATER GENUS TUOMEYA (RHODOPHYTA, BATRACHOSPERMACEAE) 1
复制标题
淡水 TUOMEYA 属（红藻门，Batrachospermaceae）的分布和系统学 1
DOI：
10.1111/j.0022-3646.1992.00850.x
复制
发表时间：
1992
影响因子：
2.9
通讯作者：
K. Cole
中科院分区：
文献类型：
--
作者：
D. Kaczmarczyk;R. Sheath;K. Cole
从纽芬兰北部到佛罗里达北部和密西西比河以东的整个已知范围内，对27个拓米亚种群进行了分析，其中包括Tuomeya River viatilis Harvey和Baileya americana Kützing的类型。由于最近有人建议将拓美亚归入巴山草属的一个组，因此对其关键的形态特征进行了详细的研究。我们的观察证实了拓米亚特有的几个特征：配子体从未分化的细胞基团而不是孔虫期发育，假薄壁组织生长，以及具斜生或垂直附生的配子体。根据这些发现，我们得出的结论是，托米亚属应该保留。利用多元形态计量学方法，发现两个群体在植株长度上存在显著差异(X分别为14.1和24.1 mm)。然而，由于没有其他的形态、环境或地理基础来划分类群，因此只有一种被识别，即美洲锥虫T.americana(Kütming)Papenfuss。种群倾向于出现在离子含量低的大溪流(>；2.8m宽)中(≤100μS·cm−1)。
Twenty‐seven populations of Tuomeya, including the types of Tuomeya fluviatilis Harvey and Baileya americana Kützing, were analyzed from the entire known range of the genus: northern Newfoundland to northern Florida and east of the Mississippi River. Key morphological features were examined in detail since it has been recently proposed that Tuomeya should be reduced to a section of the genus Batrachospermum. Our observations confirmed the presence of several characteristics unique to Tuomeya: gametophyte development from a basal mass of undifferentiated cells rather than a chantransia stage, pseudoparenchymatous growth, and carpogonia with obliquely to perpendicularly attached trichogynes. Based on these findings, we conclude that the genus Tuomeya should be retained. Using multivariate morphometrics, two groupings were found that differed significantly in plant length (X = 14.1 and 24.1 mm, respectively). However, since there was no other morphometric, environmental, or geographic basis for separation of the groupings, only one species is recognized, T. americana (Kützing) Papenfuss. Populations tend to occur in large streams (>2.8 m wide) with low ion content (≤ 100 μS · cm−1).