TABLE 1 in New record and characters of the abyssal cyclostome bryozoan Pandanipora fragilis from the Mid-Atlantic Ridge, Atlantic Ocean

TABLE 1. Distributional and morphological data for holotype and new specimens of Pandanipora fragilis. Zooidal measurements are in millimeters. Data/SpecimensHolotype, ZIRAS 1/50732Specimen ZIRAS 1/53029SourcesGrischenko, Gordon & Melnik 2020HereinLocalityAtlantic Ocean, subequatorial Mid-Atlantic RidgeAtlantic Ocean, subequatorial Mid-Atlantic RidgeGeographic coordinates13.22162° N, 44.75950° W19.98528° N, 45.93389° WDepth (m)34533165Colony fragment size3.26 × 2.21 × 1.773.31 × 1.26 × 5.11 (fragment 1) 3.79 × 1.16 × 3.14 (fragment 2)Colony formUniserial, linearUniserial, linear to semierectBranchingConsistent along entire stem lengthConsistent along entire stem lengthZooids and stem organizationDo not overlap; newly budded zooids diverge from parental zooids in the distal quarter to third of the cystidDo not overlap; newly budded zooids diverge from parental zooids in the distal fifth to half of the cystidLateral angle of divergence of newly budded zooids relative to parent zooids20–70°30–85°Zooid length1.291–1.4034.277 (fragment 1) 1.677–2.604 (fragment 2)Zooidal pseudoporesLackingRare, ovalZooidal external surface constructionWall-parallel needle-like crystallitesImbricated rectangular crystallites (visible at transverse breakage)Peristome length0.441–0.4940.968–1.403Peristome opening formCircular to ovalOvalPeristome form and bend relative to axial frontal plainElongate, angled at 50–75°Elongate, angled at 40–70°Peristome diameter0.124–0.1290.127–0.133Peristomial aperture length0.117–0.1250.128–0.161Peristomial aperture width0.102–0.1110.088–0.107Peristome internal surface constructionImbricated, foliated fabric of wedge-shaped crystallites with irregular marginsImbricated, foliated fabric of wedgeshaped crystallites with regular marginsProp-like supportOne per zooid, uniformly straight, filiformOne per zooid, straight to gently bent, filiformProp length0.867–1.8223.859 (fragment 1) 2.107–3.508 (fragment 2)Prop diameter0.035–0.0410.019–0.034Prop pseudoporesExceptionally rare, slit-likeRare, slit-like表1 脆弱潘达尼孔苔藓虫（Pandanipora fragilis）正模标本及新标本的分布与形态学数据。所有虫体测量单位均为毫米。 |参数类别|正模标本（ZIRAS 1/50732）|标本ZIRAS 1/53029| | ---- | ---- | ---- | |数据来源|Grischenko、Gordon与Melnik，2020年|本研究| |采集产地|大西洋，赤道附近中大西洋海脊|大西洋，赤道附近中大西洋海脊| |地理坐标|北纬13.22162°，西经44.75950°|北纬19.98528°，西经45.93389°| |采集深度（m）|3453|3165| |群体碎片尺寸|3.26 × 2.21 × 1.77|3.31 × 1.26 × 5.11（碎片1）；3.79 × 1.16 × 3.14（碎片2）| |群体形态|单列线性型|单列，线性至半直立型| |分枝特征|全茎干长度均保持一致|全茎干长度均保持一致| |虫体与茎干结构|虫体互不重叠；新生芽生虫体从虫体囊的远端1/4至1/3处分脱离母体虫体|虫体互不重叠；新生芽生虫体从虫体囊的远端1/5至1/2处分脱离母体虫体| |新生芽生虫体相对母体虫体的侧向分叉角度|20°~70°|30°~85°| |虫体长度|1.291~1.403|4.277（碎片1）；1.677~2.604（碎片2）| |虫体伪孔|缺失|稀少，呈卵圆形| |虫体外表面结构|与体壁平行的针状微晶|覆瓦状矩形微晶（横向断裂处可见）| |围口部长度|0.441~0.494|0.968~1.403| |围口开口形态|圆形至卵圆形|卵圆形| |围口部形态及与轴向额面的夹角|细长，夹角为50°~75°|细长，夹角为40°~70°| |围口部直径|0.124~0.129|0.127~0.133| |围口孔径长|0.117~0.125|0.128~0.161| |围口孔径宽|0.102~0.111|0.088~0.107| |围口部内表面结构|具不规则边缘的楔形微晶构成的覆瓦状叶状构造|具规则边缘的楔形微晶构成的覆瓦状叶状构造| |支柱状支撑结构|每个虫体具1个，均匀笔直，呈丝状|每个虫体具1个，笔直至轻微弯曲，呈丝状| |支柱长|0.867~1.822|3.859（碎片1）；2.107~3.508（碎片2）| |支柱直径|0.035~0.041|0.019~0.034| |支柱伪孔|极稀少，呈缝状|稀少，呈缝状|