摘要
仿对虾属(Parapenaeopsis)是暖水性的中小型虾类,全世界共报告18种。在我国只分布于山东半岛以南浅海区。本文根据我所自50年代以来在中国沿海所搜集的材料,共发现7种,其中有2个新种,除对新种作了较详细的描述和比较外,对存在混淆的种作了区分,对其它种的特征也作了简要的记述。新种模式标本均保存于中国科学院海洋研究所。
In the course of studying the Chinese penaeoid shrimps the present authors recognized the necessity of dealing separately with the species belonging to each one of several genera which are of economic and taxonomic importance.The present article is the first of a series of papers dealing with those genera belonging to Penaeoidea.In this paper the Chinese species of the genus Parapenaeopsis(Decapoda,Crustacea)were reported,among the 7 identified species,2 are described as new to science.The genus Parapenaeopsis is one of the natural group of small sized shrimps inhabiting mainly shallow coastal areas of tropical and subtropical seas in the Indo-West Pacific.Some species are morphologically similar and are difficult to be distinguished such as P.comma(Kishinouye),P.incisa Wang et Liu,sp.nov.and P.sinica Liu et Wang,sp.nov..Detailed illustrations of the pe-tasma,thelycum and appendix mascuiina of those morphologically similar species are given for comparison.The type materials of the new species are deposited in the Institute of Oceanology,Academia Sinica at Qingdao.The authors are much indebted to Dr.M.Omori of The Tokyo University of Fisheries,Japan for the loan of materials identified by the late Prof.1.Kubo for comparison.Parapenaeopsis incise Wang et Liu,sp.nov.(fig.3)Body robust,integument moderately thick.Body length of adult 35-75 mm.Rostrum horizontal in proximal half or 2/3,upturned distally,acute at tip,reaching end of second,or middle of third segment of antennular peduncle,rarely to end of third segment;with 6-8 teeth(mostly 7)on upper border(excluding epigastric tooth),the first tooth posterior to orbital margin.Post-rostral carina reaches posterior margin of carapace,evenly broad throughout its length,with certain flatten area(small pit in larger individual)on posterior half,but never sulcated(or grooved).Densely hirsuted on area before branchio-cardiac sulcus,hairs in orbito-antennal suclcus longer.Hepatic sulcus straight in posterior portion,sub-parallel with cervical sulcus,anterior portion obliquely inclined to pterygostomian angle which is acute,though not spined.Longitudinal suture less than 1/2 length of carapace,posterior portion indistinct.Transverse suture short.Abdomen longitudinally carinated from somites 4 to 6.Telson without fixed or movable marginal teeth.Eyes rather large.Cornea 1/4 as long as carapace.Antennular peduncle with styloce-rite reaching distal extremely of cornea,prosartema not reaching distal end of cornea.Anten-nale scale reaching distal end of antennular peduncle..Maxillar palp unsegmented.Maxilliped 1 with 5-segmented endopod.Maxilliped 3 thin,reaches distal end of 1st segment of antennular peduncle,with ultimate segment surpassing distal end of carpocerite.Pereiopod 1 with at least distal half of adactylus surpassing pterygostomian angle.Pereiopod 2 with distal half or entire dactylus surpassing carpocerite.Pereiopod 3 longest,with porpodus or even 1/5 of merus surpassing carpocerite.Pereiopod 5 with 3/4 or whole dactylus(rarely 1/3 propodus)surpassing pterygostomian angles.Basial spines and epipodites present on pereiopod 1 and 2.Pereiopod 3 without basial spine in both sexes.Petasma.Distal end of lateral process caliper-shaped,directed antero-inferiorly,distal end thinner,without lateral expansions or processes,but with a small apical incision,(fig.3).Appendix masculina 3-articulated,with inflated distal article.Endopod of pleopod 2 modij fied in male,forming a corneous boot-shaped process,distal margin convex at middle,with a tuft of long spine-shaped setae.Thelycum.Anterior plate longer and comparatively narrower,anterior margin arcuated,lateral margins slightly concave at middle and produced laterally at base,forming a wing like process,which is small in young individuals.
作者
刘瑞玉
王永良
Liu Ruiyu(J.Y.Liu);Wang Yongliang(Institute of Oceanology,Academia Sinica,Qingdao)
出处
《海洋与湖沼》
1987年第6期523-539,共17页
Oceanologia Et Limnologia Sinica
