The penises of bats are taxonomically distinctive in size and shape. In addition, they are variable in microscopic anatomy, indicating that histomorphological studies of copulatory organs of bats may help understanding their successful reproductive strategies. We studied adult males of 13 species of vespertilionid and phyllostomid bats. Both families exhibited the basic structure of the vascular penis of mammals: the hydrostatic elements of the corpora cavernosa and the corpus spongiosum surrounding the urethra, as well as accessory cavernous tissue. Variation in the position and amount of the tissues were observed in these families. Vespertilionid bats have a small glans penis with abundant accessory cavernous tissue on the prepuce and a highly variable baculum. The baculum varied in size and morphology, even among congeneric species, such as the three Lasiurus species and the two Myotis species. Phyllostomid species possess no bacula, but vascular structures are present to produce penile stiffening, particularly on the glans. Variation in the microscopic anatomy of the phyllostomid prepuce was observed, for example, Artibeus species had accessory cavernous tissue surrounded by a tunica albuginea, but Carollia perspicillata had two bundles of striated musculature and some adipose tissue; abundant pigments were present in the prepuce of most species.

中文翻译：

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Vespertilionidae 和 Phyllostomidae 物种（手足目，哺乳动物）龟头的组织形态学

蝙蝠的阴茎在大小和形状上在分类学上是独特的。此外，它们在微观解剖结构上是可变的，这表明对蝙蝠交配器官的组织形态学研究可能有助于了解它们成功的繁殖策略。我们研究了 13 种 vespertilionid 和 phyllostomid 蝙蝠的成年雄性。这两个家族都展示了哺乳动物血管阴茎的基本结构：海绵体和尿道周围的海绵体的静水元件，以及辅助海绵体组织。在这些家族中观察到组织位置和数量的变化。Vespertilionid 蝙蝠有一个小的龟头，包皮上有丰富的海绵状组织和高度可变的阴茎。杆菌的大小和形态各不相同，即使在同类物种中，例如三个 Lasiurus 物种和两个 Myotis 物种。Phyllostomid 物种没有 bacula，但存在血管结构以产生阴茎变硬，特别是在龟头上。观察到叶状包皮的显微解剖结构的变化，例如，Artibeus 物种具有被白膜包围的附属海绵状组织，而 Carollia perspicillata 具有两束横纹肌肉组织和一些脂肪组织；大多数物种的包皮中存在丰富的色素。Artibeus 物种具有被白膜包围的辅助海绵体组织，但 Carollia perspicillata 具有两束横纹肌肉组织和一些脂肪组织；大多数物种的包皮中存在丰富的色素。Artibeus 物种具有被白膜包围的辅助海绵体组织，但 Carollia perspicillata 具有两束横纹肌肉组织和一些脂肪组织；大多数物种的包皮中存在丰富的色素。