團隊報導了一個木斑蜂的雌雄同體個體，中體段與後體段為雌蟲形態，頭部為雄蟲與雌蟲的雜合形態，稱為馬賽克式雌雄同體。其中左眼比右眼稍小；臉部花紋為雄蟲的黃色，大顎為雌蟲的橘色；右觸角為雄蟲的13節，左觸角為雌蟲的12節。因為觸角形態與費洛蒙偵測相關，為一個適應性選汰的特徵，若之後能以電子顯微鏡掃鐘形感受器分佈，能做出更可靠的性徵發育論證。此外團隊認為眼睛大小在捕食性(或寄生性)蜂類亦為性別適應性特徵，因為產卵者需要地貌與地標的辨識與記憶能力，而雄蟲只需要在巢位周圍等待雌蟲，所以雌蟲具有更大的複眼。我覺得缺少視神經以及視覺認知的資料，難以直接做此論述。畢竟很多銀口蜂和胡蜂有類似的性別生態分化，但雄蟲複眼更大。至於木蜂的雄蟲幾乎無所事事，複眼是雌蟲的1.5倍，遠比木斑蜂的雌雄差異更大。我認為生態與行為與雌雄複眼二型性沒有必然的邏輯關係。

#iread #ithink #gynandromorphism #sex_determination

#KnowledgeByte: #Gynandromorphism is a characteristic of an organism that contains both male and female characteristics. Such organisms are also called gynandromorphs.

Here is a short overview.

https://knowledgezone.co.in/posts/What-is-Gynandromorphism-5f9413ae752a3d0b1e66d3d4

#KnowledgeByte: #Gynandromorphism is a characteristic of an organism that contains both male and female characteristics. Such organisms are also called gynandromorphs.

Here is a short overview.

https://knowledgezone.co.in/posts/What-is-Gynandromorphism-5f9413ae752a3d0b1e66d3d4

#KnowledgeByte: #Gynandromorphism is a characteristic of an organism that contains both male and female characteristics. Such organisms are also called gynandromorphs.

Here is a short overview.

https://knowledgezone.co.in/posts/What-is-Gynandromorphism-5f9413ae752a3d0b1e66d3d4

Love a good "look at this tick with two buttholes"-type paper. Click the image if you wanna see what a gynandromorph tick looks like.

 but up on ResearchGate: https://www.researchgate.net/publication/372027859

#arachnews #arachnids #ticks #Acari #Ixodidae #gynandromorphism

#KnowledgeByte: What is #Gynandromorphism?

https://knowledgezone.co.in/posts/5f9413ae752a3d0b1e66d3d4