Figure 2. Salopella australis displaying parallel parent axes dichotomising into much shorter daughter axes that are terminated with elongate sporangia, delineated with a in Early land plants from the Lower Devonian of central Victoria, Australia, including a new species of Salopella
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Figure 2. Salopella australis displaying parallel parent axes dichotomising into much shorter daughter axes that are terminated with elongate sporangia, delineated with a constriction just above dark sporogeneous region. All from Wilson Creek Shale on Frenchmans Spur track, 10 km west of Matlock. A, erect parent axes parallel to each other, dichotomising into two elongate sporangia from Wilson Creek Shale. Re-photographed here; originally published in Tims and Chambers (1984: pl. 32, fig. 4) and Tims (1980: fig. 4.1.9). Specimen NMV P50014. B, forked dichotomy terminated by sporangia from Wilson Creek Shale. And to the right hand side of the forked axis is another long axis, which based on its orientation may also be part of the same plant. Constriction at arrow, lower arrow at dichotomy and double arrow at two aligned axes. Specimen NMV P33219. C, close-up of fructification in A, sporangia barely extend beyond the confines of their subtending axes, with slight constriction present above sporogeneous region (at arrow). Specimen NMV P50014. D, E, holotype, part and counterpart. On part, constriction at arrow in sporangium. On counterpart, both parent axes are parallel to each other (at dotted arrow). Re-photographed here, originally published in Tims and Chambers (1984: pl. 32, figs. 1, 2). Specimens NMV P50008.1 and NMV P50008.2, respectively. F, Gen. et sp. indet. – short daughter axes terminated in elongate sporangia. The cortex may be absent from subtending axes, with only the central line visible. The lack of cortex prevents assigning to S. australis as width of subtending axis to sporangial width is required. Originally photographed by Tims (1980: fig. 4.1.13). Specimen NMV P50010.2. G, S. australis, with two short daughter axes, with constriction at arrow of the sporangium, which is the same width as its subtending axis. Specimen NMV P202886.
图2 南萨洛普蕨(Salopella australis)展示出平行的亲本轴二叉分枝为短得多的小轴,小轴顶端着生伸长的孢子囊,在深色产孢区上方具明显缢缩。所有标本均产自马特洛克以西10公里处法国人岭步道的威尔逊溪页岩(Wilson Creek Shale)。 A:产自威尔逊溪页岩的直立平行亲本轴,二叉分枝为两个伸长的孢子囊。本图为重新拍摄,原始发表于Tims与Chambers(1984:图版32,图4)及Tims(1980:图4.1.9)。标本编号:NMV P50014。 B:产自威尔逊溪页岩的二叉分枝结构,顶端着生孢子囊。分叉轴的右侧另有一条长轴,根据其朝向判断,可能属于同一植株的一部分。箭头指示缢缩位置,下箭头指示二叉分枝处,双箭头指示两条对齐的轴。标本编号:NMV P33219。 C:图A中繁殖结构的特写,孢子囊几乎未超出其承托轴的范围,产孢区上方具轻微缢缩(箭头所示)。标本编号:NMV P50014。 D、E:正模标本的主模与副模。主模上,箭头指示孢子囊处的缢缩;副模上,两条亲本轴彼此平行(虚线箭头所示)。本图为重新拍摄,原始发表于Tims与Chambers(1984:图版32,图1、2)。标本编号分别为NMV P50008.1与NMV P50008.2。 F:未定属种(Gen. et sp. indet.)——具短的小轴,顶端着生伸长的孢子囊。承托轴可能缺失皮层,仅可见中央维管束线。由于需测量承托轴与孢子囊的宽度比才能完成归类,而该标本缺乏皮层结构,无法获取该对比数据,因此无法将其归入南萨洛普蕨(S. australis)。原始照片由Tims(1980:图4.1.13)拍摄。标本编号:NMV P50010.2。 G:南萨洛普蕨(S. australis),具两条短的小轴,箭头指示孢子囊处的缢缩,其宽度与承托轴一致。标本编号:NMV P202886。



