Table 1 in A New Species of Apple Snail in the Genus Pomacea (Gastropoda: Caenogastropoda: Ampullariidae)
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Table 1. Morphological comparison of Pomacea occulta nov. sp. with Pomacea maculata and Pomacea canaliculata. Typical characteristics of Pomacea maculata and Pomacea canaliculata are from Hayes et al. (2012). Columns in gray are features shared by two species Pomacea maculataPomacea canaliculataPomacea occulta nov. sp.Adult shellThicknessThickThinThickSurfaceGeneral smooth, fine axial growthSmoothGeneral smooth, fine axial growthlines and frequent periodic growthlines and frequent periodic growtharrestsarrests, channeled sutures andspiral lined shallow malleationBody whorl shoulderAngulatedRoundedAngulatedInner pallial lipPigmented yellow-orange-redUnpigmentedPigmented yellow-orange-redOperculumInflexible, evenly thickFlexible, thinning dorsally towardsFlexible, thinning dorsally towardsedgeedgeAnatomical charactersKidneyAnterior leafletsNarrowBroadBroadPosterior leafletsShallow cleft with arc topDeep tapering cleftDeep tapering cleftRadulaRachidian baseConcaveConvexConcavePenis sheath glandsApical gland and basal glandApical gland and medial gland,Apical gland and medial gland,medial gland located right of themedial gland located in the sheathsheath channel and extending intochannelchannelEggsEggs per clutchA few hundred to> 450012 to ~100087 to ~1000Average egg diameter<2.00 mm> 3.00 mm2.38 mmOne-day hatchlingsMean hatching height1.249 mm2.754 mm2.23 mmMean first whorl width of hatchling0.812 mm2.406 mm2.11 mm
表1 隐瓶螺新种（Pomacea occulta nov. sp.）与斑瓶螺（Pomacea maculata）、福寿螺（Pomacea canaliculata）的形态学比对。斑瓶螺与福寿螺的典型形态特征引自Hayes等（2012）的研究。灰色列为两种物种共有的特征。 各列依次为：斑瓶螺、福寿螺、隐瓶螺新种 ## 成体贝壳 1. 厚度：斑瓶螺：厚实；福寿螺：单薄；隐瓶螺新种：厚实 2. 表面：斑瓶螺：整体光滑，具细密轴向生长线及频繁的周期性生长停滞纹，缝合线呈沟槽状且带有螺旋排列的浅褶皱；福寿螺：表面光滑；隐瓶螺新种：整体光滑，具细密轴向生长线及频繁的周期性生长停滞纹 ## 体螺层肩部：斑瓶螺：棱角状；福寿螺：圆弧形；隐瓶螺新种：棱角状 ## 外套膜内唇（inner pallial lip）：斑瓶螺：具黄-橙-红色素沉着；福寿螺：无色素沉着；隐瓶螺新种：具黄-橙-红色素沉着 ## 厣（operculum）：斑瓶螺：无柔韧性，厚度均匀；福寿螺：具柔韧性，背侧向边缘逐渐变薄；隐瓶螺新种：具柔韧性，背侧向边缘逐渐变薄 ## 解剖学特征 1. 肾脏 - 前叶：斑瓶螺：狭窄；福寿螺：宽阔；隐瓶螺新种：宽阔 - 后叶：斑瓶螺：浅裂，顶端呈弧形；福寿螺：深渐狭裂；隐瓶螺新种：深渐狭裂 2. 齿舌（radula） - 齿舌基底板：斑瓶螺：凹形；福寿螺：凸形；隐瓶螺新种：凹形 3. 阴茎鞘腺体：斑瓶螺：具顶端腺体与基部腺体；福寿螺：具顶端腺体与内侧腺体，内侧腺体位于鞘管通道右侧；隐瓶螺新种：具顶端腺体与内侧腺体，内侧腺体位于鞘管通道内并延伸至通道中 ## 卵相关特征 1. 每产卵簇卵粒数：斑瓶螺：数百枚至>4500枚；福寿螺：12枚至~1000枚；隐瓶螺新种：87枚至~1000枚 2. 平均卵径：斑瓶螺：<2.00 mm；福寿螺：>3.00 mm；隐瓶螺新种：2.38 mm ## 1日龄幼螺 1. 孵化幼螺平均高度：斑瓶螺：1.249 mm；福寿螺：2.754 mm；隐瓶螺新种：2.23 mm 2. 幼螺首个螺层平均宽度：斑瓶螺：0.812 mm；福寿螺：2.406 mm；隐瓶螺新种：2.11 mm
