The Permotriassic branchiosaurid Tungussogyrinus Efremov, 1939 (Temnospondyli, Dissorophoidea) from Siberia restudied

IF 1.4 4区地球科学 Q3 Earth and Planetary Sciences

Fossil Record Pub Date : 2009-08-03 DOI:10.1002/mmng.200900001

Ralf Werneburg

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引用次数: 17

Abstract

The enigmatic temnospondyl amphibian Tungussogyrinus bergi Efremov, 1939 shares clear synapomorphies with other branchiosaurids indicated by an anteriorly elongated infratemporal fossa and small branchial denticles. Therefore Tungussogyrinus clearly belongs to the dissorophoid family Branchiosauridae. This species is characterized by a number of derived features among temnospondyls: (1) an unusually elongated anterodorsal process of the ilium; (2) the character complex concerning the tricuspid dentition. Tungussogyrinus differs from all other branchiosaurids in these two autapomorphic characters. Herein, Tungussogyrinus is thought to represent the closest relative of a clade including all other branchiosaurids with its placement outside of this clade associated with a new feeding strategy to scrape algae with the tricuspid anterior dentition and the gracile built snout region. The subfamily Tungussogyrininae Kuhn, 1962 is newly defined here by the two derived characters of Tungussogyrinus bergi. All other branchiosaurid genera and species are included in a second subfamily Branchiosaurinae Fritsch, 1879. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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西伯利亚的Permotriassic分支龙Tungussogyrinus Efremov，1939

神秘的temnospondyl两栖动物Tungussogyrinus bergi Efremov, 1939与其他鳃龙类具有明显的突触形态，其特征是前侧延长的颞下窝和小的鳃齿。因此Tungussogyrinus显然属于Branchiosauridae科。这一物种的特点是在temnospondyl之间有许多衍生的特征:(1)髂骨的前嗅突异常延长;(2)关于三尖牙列的特征复合体。通古氏支龙在这两个自异形特征上不同于其他所有的支龙类。在这里，通古斯gyrinus被认为代表了包括所有其他支龙类在内的分支的最近的亲属，它的位置在这个分支的外面，与一种新的进食策略有关，即用三尖瓣前牙和细长的鼻部区域刮取藻类。通古斯gyrinus Kuhn, 1962是由通古斯gyrinus bergi的两个衍生特征所新定义的亚科。所有其他的鳃龙属和种都包括在第二个亚科Branchiosaurinae Fritsch, 1879。(©2009 WILEY-VCH Verlag GmbH &KGaA公司，Weinheim)

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来源期刊

Fossil Record PALEONTOLOGY-

CiteScore

2.50

自引率

7.10%

发文量

审稿时长

>12 weeks

期刊介绍： Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.