The conglutinate of the creeper, Strophitus undulaus (Say, 1817) (Unionoidea: Unionidae), was studied with light and scanning electron microscopy. This conglutinate has a very simple structure consisting of a homogeneous, spongy material containing the glochidia. Each glochidium is contained within its egg membrane and is tethered to this membrane by the glochidial thread. Within the female's marsupium, the glochidia are contained within the conglutinate. When they are expelled to the water the glochidia emerge through pores to the outside and become infective. The mechanism for pushing the glochidia out of the conglutinate is osmotic. The marsupium apparently bathes the conglutinates in a hypertonic solution. When conglutinates are expelled to the surrounding hypotonic water, the spongy material of the conglutinate swells, pushing the glochidia out through the pores. Unlike other conglutinates studied, that of S. undulatus displays a brief period of innate motion which may be adaptive in attracting a suitable host.

中文翻译：

---

淡水贻贝的动力学接合，STROPHITUS UNDULATUS (SAY, 1817)

用光学和扫描电子显微镜研究了爬行动物 Strophitus undulaus (Ssay, 1817) (Unionoidea: Unionidae) 的粘连物。这种黏附物具有非常简单的结构，由均质的、海绵状材料组成，其中含有球果。每个钩球藻都包含在它的卵膜内，并通过钩球线被拴在这个膜上。在雌性的有袋动物中，glochidia 包含在粘连物中。当它们被排出到水中时，钩虫会通过毛孔出现在外面并具有传染性。将 glochidia 从粘合物中推出的机制是渗透性的。有袋类动物显然在高渗溶液中浸泡了粘着物。当粘着物被排出到周围的低渗水中时，粘着物的海绵状物质膨胀，通过毛孔推出glochidia。与其他研究的粘连物不同，波状沙门氏菌显示出短暂的先天运动，这在吸引合适的宿主方面可能是适应性的。