Rediagnosis of the monotypic genus Lepadicyathus Prokofiev 2005 (Gobiesocidae: Diademichthyinae) and redescription of Lepadicyathus minor (Briggs 1955), new combination

Rediagnosis of the monotypic genus Lepadicyathus Prokofiev 2005 (Gobiesocidae: Diademichthyinae) and redescription of Lepadicyathus minor (Briggs 1955), new combination
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单型 Lepadicyathus Prokofiev 2005(Gobiesocidae:Diademichthyinae)的重新诊断和 Lepadicyathus 小(Briggs 1955)的重新描述,新组合

DOI:
10.1007/s10228-021-00851-0
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发表时间:
2022
影响因子:
1.2
通讯作者:
Motomura, Hiroyuki
Motomura, Hiroyuki
中科院分区:
生物学4区
文献类型:
--
作者:
Fujiwara, Kyoji;Conway, Kevin W.;Summers, Adam P.;Motomura, Hiroyuki

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修订的诊断提供了鲜为人知的粘鱼属LepadicyathusProkofiev 2005.该属隶属于Diademichthyinae(sensuConway et al.)其特征是:吻中等长,侧观略尖;口裂很小,仅限于吻的前尖,两颚的后部被厚皮覆盖;鳃膜附着于峡部;鳃开口小,狭缝窄,侧观背侧与第12或第13胸鳍条基部平齐;“单个”粘连盘,大小适中,长度为SL的16.6-20.4%;盘中心平坦,无空腔;盘乳头扁平,盘表面大小相似;头侧线管中等发达,包括2个鼻孔、2个泪孔和2个眶后孔;盖前和下颌侧线管缺失;肛门位于大约中间之间的后缘盘和臀鳍起源(盘到肛门的长度为盘到臀鳍起点长度的45.8-55.5%);背鳍、臀鳍和尾鳍之间由膜弱连接,鳍之间有明显的凹口;鼻骨长,前端尖,在背面视图中终止于前上颌骨的前内侧尖端;很少下颌牙齿(约。6),局限于前腔。1/4的齿膜;基鳃成分(包括软骨)无;尾侧骨骼具上和下尾下板,被狭窄的尾下间隙分开。如本文所认识到的,Lepadicyathus是单型的并且仅包含Lepadicyathus minor(Briggs 1955),新组合。该物种先前被归类为LepadichthysWaite 1904,并代表LepadichathusmendeleeviProkofiev 2005的高级异名,Lepadichathus的模式种。
A revised diagnosis is provided for the poorly known clingfish genusLepadicyathusProkofiev 2005. The genus belongs to Diademichthyinae (sensuConway et al.) and is characterized by the following combination of characters: snout moderate in length, slightly pointed in lateral view; oral cleft very small, restricted to anterior tip of snout, posterior portion of both jaws covered by thick skin; gill membrane attached to isthmus; gill opening tiny, narrow slit, dorsal-most extent level with base of 12th or 13th pectoral-fin ray in lateral view; “single” adhesive disc, its size moderate, length 16.6–20.4% SL; center of disc flat, without cavity; disc papillae flattened, similar in size across disc surface; cephalic lateral-line canals moderately developed, including 2 nasal, 2 lacrimal and 2 postorbital pores; pre-opercular and mandibular lateral-line canals absent; anus situated about midway between posterior margin of disc and anal-fin origin (disc to anus length 45.8–55.5% of disc to anal-fin origin length); dorsal, anal, and caudal fins weakly connected by membrane with distinct notch between fins; premaxillae separated anteriorly by large circular gap in dorsal view; nasal bone long, anterior tip pointed, terminating close to anteromedial tip of premaxilla in dorsal view; few lower-jaw teeth (ca. 6), restricted to anterior ca. 1/4 of dentary; basibranchial elements (including cartilages) absent; caudal skeleton with upper and lower hypural plates, separated by narrow hypural diastema. As recognized herein,Lepadicyathusis monotypic and contains onlyLepadicyathus minor(Briggs 1955), new combination. The species has previously been assigned toLepadichthysWaite 1904 and represents a senior synonym ofLepadicyathus mendeleeviProkofiev 2005, type species ofLepadicyathus.
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DOI: 10.1643/i2020132
发表时间: 2021
影响因子: 1.5
作者:
Fujiwara, Kyoji;Conway, Kevin W.;Motomura, Hiroyuki
通讯作者: Motomura, Hiroyuki
DOI: --
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