de Siqueira Gustavo Henrique Lima, Silva Felipe Ennes, Santana Marcelo Ismar Silva
Wild Animal Anatomy Laboratory, School of Agricultural Sciences and Veterinary Medicine, University of Brasília, Brasília, DF, Brazil.
School of Environment & Life Sciences, University of Salford, Salford, UK.
Anat Histol Embryol. 2018 Aug;47(4):372-384. doi: 10.1111/ahe.12365. Epub 2018 Jun 3.
Morphological characterisation of the genital organs of primates may bring significant contributions to the understanding of different reproductive behaviours and support new conservation strategies. However, relevant or detailed descriptions of genital morphology of several primate species are still lacking. This study describes the gross and microscopic anatomy of the internal and external genitalia of Marca's marmoset (Mico marcai). The same organs described in other primate species were identified here, but some anatomical particularities were detected, such as absence of a dartos tunic, presence of a vas deferens ampulla, absence of spongious erectile tissue in the pelvic urethra, separation of prostate gland lobes by a longitudinal sulcus and lack of septation in the corpus cavernosus and spongiosus at the level of the shaft and free portion of the penis. Keratinised type 1 spicules arising from epidermal or dermal projections were found in the free portion of the penis. Microscopic analysis revealed a small bone (baculum) consisting of peripheral compact bone and a central, non-ossified area filled with vascular tissue at the distal end of this portion of the penis. Results of this study may support further comparative studies of primates' reproductive ecology.
灵长类动物生殖器官的形态学特征描述可能会对理解不同的生殖行为做出重大贡献，并支持新的保护策略。然而，目前仍缺乏对几种灵长类物种生殖器官形态的相关或详细描述。本研究描述了马尔卡狨（Mico marcai）内外生殖器的大体解剖和微观解剖结构。本研究中识别出了与其他灵长类物种中描述的相同器官，但也发现了一些解剖学上的特殊性，例如缺乏肉膜、存在输精管壶腹、盆腔尿道中无海绵状勃起组织、前列腺叶被纵向沟分开以及阴茎体部和游离部的海绵体和尿道海绵体缺乏分隔。在阴茎游离部发现了由表皮或真皮突起产生的1型角质化小刺。显微镜分析显示，在阴茎该部分远端有一块小骨（阴茎骨），由外周致密骨和中央充满血管组织的非骨化区域组成。本研究结果可能有助于进一步开展灵长类动物生殖生态学的比较研究。
