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记述了产于云南昭通早泥盆世布拉格期基干肺鱼形动物一新属、新种——多孔弓鱼(Arquatichthys porosus gen.et sp.nov.)。新材料包括一件较为完整的下颌和鳞片若干。与基干肺鱼形动物相近的特征有:第四下齿骨水平凹线呈“L”形;下颌表面可见许多不规则排列的感觉管开孔;具三块冠状骨;冠状骨侧部为宽阔的小齿带;侧联合齿骨附着区较小;颌收肌窝大;菱形鳞片具明显的前腹突。鉴别特征包括下颌背缘明显隆起,以及后缘具加长的被覆压区。多孔弓鱼的发现为探讨肉鳍鱼类的早期分化提供了新的资料,在早期肉鳍鱼类的系统发育关系框架下讨论了鳞片的特征演化序列。
A new genera, new species, Arquatichthys porosus gen.et sp.nov., From the Zhaotong Early Devonian Bragg Period in Yunnan, China, is described. The new material includes a more complete jaw and a few scales. Similar features to the basal fish of the lung fossil: the fourth lower horizontal bone of the lower bone was “L” shaped; many irregularly arranged sensory tube openings were visible on the mandibular surface; with three coronal bones; For the wide of the small cog band; side joint denture attachment area smaller; maxillary muscular fossa; rhombic scales with obvious anterior abdomen. The distinguishing features include prominent bulge of the mandibular back, and extended posterior nodal coverage. The discovery of the multi-hole bowfish provides new information for exploring the early differentiation of the meatfin fish and discusses the evolutionary sequence of the scales in the context of the phylogenetic relationship of the early-stage finfish.