Fredericqia deveauniensis, gen. et sp. nov. (Phyllophoraceae, Rhodophyta), a New Cryptogenic Species
Fredericqia deveauniensis, gen. et sp. nov. (Phyllophoraceae, Rhodophyta), a New Cryptogenic Species
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Fredericqia deveauniensis，gen。
DOI：
10.7872/crya.v34.iss2.2013.273
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
G. Saunders
中科院分区：
文献类型：
--
作者：
C. Maggs;L. Gall;F. Mineur;J. Provan;G. Saunders
摘要
一种以前与爱尔兰的Ahnfeltiopsis devoniensis和加拿大东部和美国东北部的Gymnogongrus crenulatus混淆的物种由于其隐源起源而未被描述。我们发表的研究表明，一个跨大西洋的引进，可能与船舶压舱石，但与A。来自加州的leptophylla需要进一步调查，北太平洋起源是可能的。在这里，我们报告说，34个样本的这个物种从北方爱尔兰（英国），新罕布什尔州（美国）和新玩法（加拿大）的基因相同的cox 2 -3间隔位点，与最近引进。相比之下，在A.在来自加州3个地点的9个样品中发现4种单倍型。该物种（G. crenulatus）最近在北太平洋首次被发现，在不列颠哥伦比亚省为加拿大生命条形码项目进行的调查中。系统发育分析的质体编码的rbcL和线粒体cox 1基因序列将其从A. leptophylla与两个北太平洋分类群Gymnogongrus chiton（M.A. Howe）P.C. Silva et De Cew和“Ahnfeltiopsis gigartinoides”，均来自加州。该属的另两个成员是Fredericqia chiton（M.A.和Fredericqia decewii，sp. nov.，以前被称为Ahnfeltiopsis gigartinoides，但与来自墨西哥的模式不同种。Fredericqia种形成广泛的基部固着器，产生圆柱状或压缩的直立配子体轴，高50-300毫米。前果发育为多孔但无粘液鞘的紧凑囊果，或果四孢子体外突（F。chiton）。生活史可能是异形的（直立的配子体和壳状的孢子体，具有紧密的，结合的下基组织，形成链状孢子囊，两者在F。deveauniensis），或carpotetrasporangial。F. deveauniensis与该属的其他成员的不同之处在于在扁平的叶片上形成内部囊果。拟阿氏藻/ DNA条形码/裸贡藻属/引种/分子系统学
Abstract
A species previously confused with Ahnfeltiopsis devoniensis in Ireland and with Gymnogongrus crenulatus in eastern Canada and north-eastern USA has remained undescribed because of its cryptogenic origin. Our published research suggested a trans-Atlantic introduction, possibly with ship ballast rock, but the relationship with A. leptophylla from California required further investigation and a North Pacific origin was possible. Here, we report that 34 samples of this species from Northern Ireland (UK), New Hampshire (USA) and New Brunswick (Canada) were genetically identical at the cox2–3 spacer locus, consistent with a recent introduction. By contrast, in A. leptophylla, four haplotypes were found in 9 samples from three sites in California. This species (as G. crenulatus) was recently discovered in the North Pacific for the first time, during surveys in British Columbia for the Canadian Barcode of Life Project. Phylogenetic analysis of plastid-encoded rbcL and mitochondrial cox1 gene sequences separate it from A. leptophylla in a robust clade with two North Pacific taxa, Gymnogongrus chiton (M.A. Howe) P.C. Silva et De Cew, and “Ahnfeltiopsis gigartinoides”, both from California. It is here described as a new species in a new genus, Fredericqia deveauniensis, gen. et sp. nov. The two other members of the genus are Fredericqia chiton (M.A. Howe) comb. nov. and Fredericqia decewii, sp. nov., previously known as Ahnfeltiopsis gigartinoides but not conspecific with the type from Mexico. Fredericqia species form extensive basal holdfasts giving rise to terete or compressed erect gametophytic axes 50–300 mm high. Procarps develop either into compact cystocarps with multiple ostioles but no mucilaginous sheath, or externally protruding carpotetrasporophytes (in F. chiton). Life histories are potentially heteromorphic (erect gametophytes and crustose sporophytes with compact, coalescent hypobasal tissue, forming catenate sporangia, both reproduce apomictically in F. deveauniensis), or carpotetrasporangial. F. deveauniensis differs from the other members of the genus in forming internal cystocarps on flattened blades. Ahnfeltiopsis / DNA barcoding / Gymnogongrus / introduction / molecular systematics