CAJ | 학술논문

通过对保存在南京地质古生物研究所的弓石燕类模式标本(由葛利普最早研究)的再研究,作者认为,Sinospirifer Grabau, 1931仍是一个有效属.它与Cyrtospirifer Nalivkin, 1924的主要区别在于腹壳后部强烈加厚、假三角板中央具有肉茎管以及在壳褶及褶间均发育微瘤 (whitneyi-subextensus型的微细纹饰).Tien (1938)指定S. sinensis Grabau, 1931作为Sinospirifer的模式种,因为它与S. subextensus (Martelli, 1902) 有着相同的形态构造,包括壳形、壳率、中槽壳线型式、中央肉茎管、微细纹饰及内部构造等,所以S. sinensis应是S. subextensus (Martelli, 1902)的次同义名,Sinospirifer的模式种应更改为S. subextensus.此外,S. archiaciformis, S. wangleighi, S. vilis, S. subhayasakai, S. pellizzarii, S. pellizzariformis和S. heterosinosus几个种在外部及内部构造上也与S. subextensus相同,同样被视作为S. subextensus的次同义名.葛利普文中所列举的所谓几个种之间的区分特征已在湖南中部同一地点同一层位所采集的同一样品的标本中观察到,它们仅仅是种内变异的现象.对于以往不同种的标本被归入同种的情况,作者均作了修订,例如,S. vilis Grabau, 1931实际代表几个种标本的混合体,经修订,分别被归于Sinospirifer subextensus, "Sinospirifer" hayasakai, Tenticospirifer supervilis等.S. subhayasakai Grabau, 1931仅限于正模为代表的特征,被归于Sinospirifer subextensus,而两个副模标本(NIGP 2736和2740)则应归入"Sinospirifer" gortanioides Grabau, 1931.
통과대보존재남경지질고생물연구소적궁석연류모식표본(유갈리보최조연구)적재연구,작자인위,Sinospirifer Grabau, 1931잉시일개유효속.타여Cyrtospirifer Nalivkin, 1924적주요구별재우복각후부강렬가후、가삼각판중앙구유육경관이급재각습급습간균발육미류 (whitneyi-subextensus형적미세문식).Tien (1938)지정S. sinensis Grabau, 1931작위Sinospirifer적모식충,인위타여S. subextensus (Martelli, 1902) 유착상동적형태구조,포괄각형、각솔、중조각선형식、중앙육경관、미세문식급내부구조등,소이S. sinensis응시S. subextensus (Martelli, 1902)적차동의명,Sinospirifer적모식충응경개위S. subextensus.차외,S. archiaciformis, S. wangleighi, S. vilis, S. subhayasakai, S. pellizzarii, S. pellizzariformis화S. heterosinosus궤개충재외부급내부구조상야여S. subextensus상동,동양피시작위S. subextensus적차동의명.갈리보문중소열거적소위궤개충지간적구분특정이재호남중부동일지점동일층위소채집적동일양품적표본중관찰도,타문부부시충내변이적현상.대우이왕불동충적표본피귀입동충적정황,작자균작료수정,례여,S. vilis Grabau, 1931실제대표궤개충표본적혼합체,경수정,분별피귀우Sinospirifer subextensus, "Sinospirifer" hayasakai, Tenticospirifer supervilis등.S. subhayasakai Grabau, 1931부한우정모위대표적특정,피귀우Sinospirifer subextensus,이량개부모표본(NIGP 2736화2740)칙응귀입"Sinospirifer" gortanioides Grabau, 1931.
Restudy of Grabau's type specimens shows that Sinospirifer Grabau, 1931 differs from Cyrtospirifer Nalivkin, 1924 in a number of important shell characters. Sinospirifer is distinguished from Cyrtospirifer by its secondarily infilled ventral posterior, a pseudodeltidium penetrated by a central pedicle tube/foramen, and the whitneyi-subextensus micro-ornament. The type species Spirifer (Sinospirifer) sinensis (subsequent designation by Tien, 1938) is a junior synonym of Spirifer verneuili var. subextensus Martelli, 1902, and henceforth Spirifer subextensus is the type species of Sinospirifer. Most of the illustrated type specimens of eight species of Sinospirifer named by Grabau (1931) are closely similar to Sinospirifer subextensus (Martelli, 1902) in their overall shell shapes, sinal plication patterns, and the presence of a central pedicle tube/foramen, as well as the whitneyi-subextensus micro-ornament, and are considered to be conspecific with S. subextensus. These include Sinospirifer sinensis, S. archiaciformis, S. wangleighi, S. pellizzarii, S. pellizzariformis, and S. heterosinosus. A number of specimens of Sinospirifer vilis and S. subhayasakai illustrated by Grabau (1931), including their holotypes, are transferred to S. subextensus, and the remaining specimens are attributed to four or five other species.