THE LONG-ROSTRUMED ELASMOBRANCH BANDRINGA ZANGERL, 1969, AND TAPHONOMY WITHIN A CARBONIFEROUS SHARK NURSERY
THE LONG-ROSTRUMED ELASMOBRANCH BANDRINGA ZANGERL, 1969, AND TAPHONOMY WITHIN A CARBONIFEROUS SHARK NURSERY
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DOI：
10.1080/02724634.2013.782875
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发表时间：
2014-01-01
影响因子：
1.4
通讯作者：
Coates, Michael I.
中科院分区：
文献类型：
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作者：
Sallan, Lauren Cole;Coates, Michael I.
板鳃鲨（英语：Bandringa），学名为板鳃鲨科（Elasmobranchii）、软骨鱼纲（Chondrichthyes），产于伊利诺伊州马松溪的拉格斯塔特（Lagerstatte），以其细长的吻占全身长度的一半而闻名。本属以前包含两个不同的种（B. rayi和B. herdinae）。然而，重新检查所有编目材料从马松溪和类似的北美年龄的煤炭测量地点表明，以前认为诊断在物种水平上的特点，可以归因于在相邻的海洋和非海洋存款的差异埋藏。我们没有发现形态上不同的种群的证据。一个单一的Bandringa展示互补的数据集，从不同的保存模式的地方提供了一个更完整的图片比居民类群从一个单一的存款的硬组织和软组织解剖。我们的新重建Bandringa合并了几个以前未报道的功能，包括腹向颌，星状鳞，分支侧线，鳍棘轴承光滑肋骨。Bandringa在板鳃亚纲总群中占据一个未解决的位置，但与sphenacanthids，hybodontiforms和其他干群成员分支显示相似之处。Bandringa最简单的解释是一种淡水、底栖、吸食鲨鱼，并作为现代锯鳐（Pristidae）的合理类似物。石炭纪班丁加的幼鱼似乎在迁移到其他地方的淡水之前，就居住在马松溪（Mazon Creek）的咸水和海水中，这是已知最早的鲨鱼托儿所之一。
The shark Bandringa (Elasmobranchii, Chondrichthyes), from the Pennsylvanian (Moscovian) Lagerstatte of Mazon Creek, Illinois, is notable for an elongated snout constituting up to half of total body length. This genus formerly contained two distinct species (B. rayi and B. herdinae). However, reexamination of all cataloged material from Mazon Creek and similarly aged North American coal measure localities shows that characteristics previously considered diagnostic at the species level can be attributed to differential taphonomy in adjacent marine and non-marine deposits. We find no evidence of morphologically distinct populations. A monospecific Bandringa exhibiting complementary data sets from localities with different modes of preservation provides a more complete picture of hard-and soft-tissue anatomy than resident taxa from a single deposit. Our new reconstruction of Bandringa incorporates several previously unreported features, including ventrally directed jaws, stellate squamation, a branched lateral line, and fin spines bearing smooth costae. Bandringa occupies an unresolved position within total-group Elasmobranchii, but displays similarities with sphenacanthids, hybodontiforms, and other member clades of the stem group. Bandringa is most simply interpreted as a freshwater, benthic, suction-feeding shark, and as a plausible analogue of modern sawfish (Pristidae). Juveniles of the Carboniferous Bandringa appear to have inhabited one of the earliest known shark nurseries at the brackish and marine Mazon Creek before migrating to freshwaters elsewhere.