论文部分内容阅读
最近,在关岭、兴义一带上三叠统竹杆坡组中发现了海百合化石群。海百合产于上三叠统竹杆坡组底部1.5m的泥质灰岩层面上,海百合保存非常完好,常以丛状群体出现,根、茎、萼完整。丛状海百合群体由3～42枝海百合组成,海百合与双壳类:Daonella、菊石:Protrachyceras共生,亦见少量的水生爬行动物贵州龙与其共生。最近王立亭在竹杆坡组中发现晚三叠世牙形刺分于Neogondolella polygnathiformic,N.naantungensis,N.Tad pola将其归入晚三叠世。 海百合化石群主要分子有:Traumatocrinus hsui Mu,Traumatocrinus hsui enormis Mu,Encrinus liliformis Miller,占海百合化石群的90％。Traumatocrinus冠大,上宽下窄,萼部呈腕状,有5个内底板,5个底板,5个辐板,10个腕板及一个间腕板,三级腕20个,双列,内侧分,具有羽枝,在分枝处生长出疣和刺。茎圆,茎的中孔圆而小,节面上有放射状的小沟通到茎的缝合线处,形成许多小孔,节面小沟间的脊顶由许多人字形的突起排列而成。茎板近萼部分3、4级,向根渐渐变成各节近等,并变薄。该化石群为丛状群体.由3～42枝海百合组成、茎最粗者达2.2cm,小者为0.3cm,茎最长达1.4m,小者0.1m,经对完好海百合统计,茎节(茎板)一般为376节。茎中部的茎节×茎径=5.85。冠最大者达38cm,具五级羽枝,一
Recently, sea feldspar fossils were found in the Triassic Zhuopanpo Formation in the Guanling and Xingyi areas. Sea Lily produced in the bottom of the Upper Triassic Zhupanshi 1.5m mudstone limestone level, sea lily preservation is very intact, often appear in groups of plexiform, root, stem, calyx integrity. Plexus lily group consists of 3 to 42 sea lily, sea lily and bivalve: Daonella, ammonite: Protrachyceras symbiosis, see also a small amount of aquatic reptiles Guizhou dragon symbiosis. Recently, Wang Leting found that the Late Triassic conodonts were found in Neopondolella polygnathiformic, N. nantungensis and N. Tad pola in the Zhupanpo Formation and were classified as Late Triassic. Key elements of the sea lily fossil group are: Traumatocrinus hsui Mu, Traumatocrinus hsui enormis Mu, Encrinus liliformis Miller, accounting for 90% of sea lily fossil group. Traumatocrinus crown large, narrow width on the wide, calyx was wrist, there are 5 inner floor, 5 floor, 5 webs, 10 wrist and a wrist, three wrist 20, double row, medial Points, with feather, warts and thorns grow in the branches. Stems round, the stem of the meso-hole round and small, nodal radial radial communication to the stem suture Department, the formation of many small holes, nodal nodding between the ridge by many chevron protrusions arranged. Stem near the calyx part of the 3, 4 level, to the root gradually become section near, and thinning. The fossil group is a plexiform group, which consists of 3 to 42 sea lilies, with the stems up to 2.2cm, the smallest ones being 0.3cm and the longest ones being up to 1.4m and the smaller ones being 0.1m. According to the intact sea lily statistics, Stems (stems) are generally 376 knots. Stems in the middle of the stem × stem diameter = 5.85. The largest crown up to 38cm, with five feather, one