Anthwal Neal, Hall Ronald P, de la Rosa Hernandez Frederick Aneudy, Koger Michael, Yohe Laurel R, Hedrick Brandon P, Davies Kalina T J, Mutumi Gregory L, Roseman Charles C, Dumont Elizabeth R, Dávalos Liliana M, Rossiter Stephen J, Sadier Alexa, Sears Karen E
King's College London, Centre for Craniofacial and Regenerative Biology, London, UK.
Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, California, USA.
Anat Rec (Hoboken). 2023 Nov 23. doi: 10.1002/ar.25353.
Sensory organs must develop alongside the skull within which they are largely encased, and this relationship can manifest as the skull constraining the organs, organs constraining the skull, or organs constraining one another in relative size. How this interplay between sensory organs and the developing skull plays out during the evolution of sensory diversity; however, remains unknown. Here, we examine the developmental sequence of the cochlea, the organ responsible for hearing and echolocation, in species with distinct diet and echolocation types within the ecologically diverse bat super-family Noctilionoidea. We found the size and shape of the cochlea largely correlates with skull size, with exceptions of Pteronotus parnellii, whose high duty cycle echolocation (nearly constant emission of sound pulses during their echolocation process allowing for detailed information gathering, also called constant frequency echolocation) corresponds to a larger cochlear and basal turn, and Monophyllus redmani, a small-bodied nectarivorous bat, for which interactions with other sensory organs restrict cochlea size. Our findings support the existence of developmental constraints, suggesting that both developmental and anatomical factors may act synergistically during the development of sensory systems in noctilionoid bats.
感觉器官必须与包裹它们的大部分颅骨一起发育，这种关系可能表现为颅骨限制器官、器官限制颅骨，或者器官在相对大小上相互限制。然而，在感觉多样性的进化过程中，感觉器官与发育中的颅骨之间的这种相互作用是如何发生的，仍然未知。在这里，我们研究了生态多样的叶口蝠超科中具有不同饮食和回声定位类型的物种中，负责听觉和回声定位的耳蜗的发育序列。我们发现，耳蜗的大小和形状在很大程度上与颅骨大小相关，但帕氏叶鼻蝠除外，其高占空比回声定位（在其回声定位过程中几乎持续发出声脉冲，以便收集详细信息，也称为恒频回声定位）对应于更大的耳蜗和基转，以及小红长舌蝠，一种小型食蜜蝙蝠，其与其他感觉器官的相互作用限制了耳蜗大小。我们的研究结果支持发育限制的存在，表明发育和解剖因素可能在叶口蝠感觉系统的发育过程中协同作用。
