A new cyanobacterium, Patagonifilum jurassicum nov. gen. et sp., is structurally preserved in Late Jurassic hydrothermally influenced siliceous chert from the Deseado Massif, Patagonia, Argentina. The cyanobacterium occurs in the form of loosely to densely spaced, heteropolar filaments (up to 4.5 μm wide) that form turf-like stands, or spherical to hemispherical colonies on different substrates, usually degraded plant stems. Filaments consist of barrel-shaped cells enveloped in a non-stratified sheath, and basal cells that are distinct. The fossil is similar to certain present-day members of the Oscillatoriales (e.g., Homoeothrix), Synechococcales (e.g., Tapinothrix), and Nostocales (e.g., Rivularia, Gloeotrichia). Associated with the cyanobacteria are spheroidal to ovoid vesicles, up to 45 μm in diameter, which occur singly or clustered, mostly near the base of the filaments. They resemble certain present-day zoosporic fungi, and algae, coccoid cyanobacteria, and possibly certain arthropod eggs; however, their systematic affinities remain unresolved. This discovery is nevertheless important because it suggests that the cyanobacterial overgrowths from the Patagonian Jurassic cherts were not monospecific, but rather comprised different organisms that perhaps even interacted with each other.

一种新的蓝藻，Patagifilum jurassicum nov。gen。等在阿根廷巴塔哥尼亚Deseado Massif的侏罗纪热液作用的硅质硅质石中进行了结构保存。蓝细菌以疏松到密集的异极长丝（最大4.5μm宽）的形式出现，在不同的基质（通常是退化的植物茎）上形成草皮状的立场，或球形到半球形的菌落。细丝由包裹在非分层鞘中的桶状细胞和基底细胞组成。化石类似于Oscillatoriales的某些现今构件（例如，Homoeothrix），Synechococcales（例如，Tapinothrix），和Nostocales（例如，胶须藻属，Gloeotrichia）。与蓝细菌相关的是球形到卵圆形的囊泡，直径最大为45μm，单独或成簇出现，大多靠近长丝的基部。它们类似于当今的某些游动孢子真菌，藻类，球状蓝细菌以及可能的某些节肢动物卵。但是，它们的系统亲和力仍未解决。然而，这一发现很重要，因为它表明巴塔哥尼亚侏罗纪硅质cher虫的蓝细菌过度生长不是单特异性的，而是由可能彼此相互作用的不同生物组成。