Table 2 in The first fossil spider cricket (Orthoptera: Gryllidae: Phalangopsinae): 20 million years of troglobiomorphosis or exaptation in the dark?

Table 2. Explanation of the synapomorphies in Fig. 4
1.C-sclerites located at the apex of the epiphallic arm(B-sclerite without any particular development),from which they are distinctly separate.2.Endophallic apodeme without mediodorsal crestbetween endophallic sclerite and apex of ectophallicfold.3.Ectophallic arc extended above ectophallic fold, andprotruding beyond it.4.Male metanotal gland globose.5.Epiphallic sclerite with visor-like median projection.6.Epiphallic parameres 1 and 2, large, spine-like.7.Mesotibia with two apical spurs.8.Median inner apical spur of metatibia longer thandorsal apical spur.9.C-sclerite reduced, forming a soft, quadrangularlobe.10.Ectophallic apodemes large and robust, with anabutment that supports the epiphallic sclerite.11.Lateral lamina of endophallic apodeme markedlyelongate.12.Epiphallic–ectophallic membrane with pair ofnon-glandular invaginations.13.Epiphallic paramere 2 elongate, bordering the entiredorsal surface of the epiphallic arm.14.Membrane separating the A-sclerite from theepiphallic parameres inflated, displacing theA-sclerite posteriad of the basal plate of theC-sclerite.15.Metafemora very thin, even basally.16.C-sclerite differentiated and complex, comprising along, thin plate, a lateral spine or notch, and amore or less developed ventral pouch.17.C-sclerite vertically articulated with epiphallic arm.18.Invaginations of epiphallic–ectophallic membranedeveloped into two large glands.19.Membrane between A-sclerite and epiphallicparameres greatly developed, altering the entireshape of the epiphallic arm.20.C-sclerite with a large glandular system formed bythe ventral pouch and the lateral spine, located onthe outer face of the epiphallic arm.

表2 图4中共源性状解释
1. C-骨片（C-sclerites）位于阳茎端臂（epiphallic arm）的顶端，B-骨片（B-sclerite）无特殊发育，且与阳茎端臂明显分离。
2. 内阳茎突（endophallic apodeme）在内阳茎骨片（endophallic sclerite）与外阳茎褶（ectophallic fold）顶端之间，无背中脊（mediodorsal crest）。
3. 外阳茎弧（ectophallic arc）延伸至外阳茎褶上方，并超出该褶的边缘。
4. 雄性后胸背板腺（metanotal gland）呈球形。
5. 阳茎端骨片（epiphallic sclerite）具帽檐状的中突。
6. 阳茎端侧突（epiphallic parameres）1与2粗大，呈棘状。
7. 中胫节（mesotibia）具2根端距。
8. 后胫节（metatibia）的内侧中端端距长于背侧端距。
9. C-骨片退化，形成柔软的四方形叶状突。
10. 外阳茎突（ectophallic apodemes）粗大强健，具支撑阳茎端骨片的抵止结构。
11. 内阳茎突的侧片（lateral lamina）显著延长。
12. 阳茎端-外阳茎膜（epiphallic–ectophallic membrane）具一对无腺性内陷。
13. 阳茎端侧突2延长，环绕阳茎端臂的整个背侧面。
14. 分隔A-骨片（A-sclerite）与阳茎端侧突的膜膨大，将A-骨片推至C-骨片基板的后方。
15. 后足股节（metafemora）极为纤细，就连基部亦然。
16. C-骨片分化复杂，由细长骨板、侧棘或缺刻，以及发育程度不一的腹囊构成。
17. C-骨片与阳茎端臂以垂直方式关节连接。
18. 阳茎端-外阳茎膜的内陷发育为两个大型腺体。
19. 分隔A-骨片与阳茎端侧突的膜极度发达，改变了阳茎端臂的整体形态。
20. C-骨片具由腹囊与侧棘构成的大型腺体系统，该系统位于阳茎端臂的外侧面。