Regarding all these synonymous or very closely related species in the Ficus carica-palmata complex, there is one undeniable fact. The oldest officially named species is Ficus carica L., named by Linnaeus & published in Species Plantarum in 1753. According to the International Codes of Botanical Nomenclature, Rule (Law) of Priority, this is a correct name that should be used!

5.   Socotran Fig (Ficus vasta)

One additional comment about host sharing. Fig biologists originally thought each species of fig had its own unique symbiotic pollinator wasp; however, peer-reviewed publications during the past few decades have clearly shown that host sharing and pollinator sharing are a lot more common than previously thought. I have included the following section from my Pollinators 1 about this subject.

When I began studying figs (Ficus) with horticulturist Steven Disparti over 30 years ago, I thought each species of fig had it own unique, symbiotic pollinator. This may still be true for some of the 876 species of Ficus; however, multiple pollinators and evidence from host & pollinator sharing data have complicated the fig & fig wasp story. The relationships undoubtedly follow kinships within subgenera & sections depicted in enormous Ficus DNA cladograms (evolutionary trees). There are 4 pollinated Australian fig species on campus in subgenus Urostigma and at least 3 verified species of Australian fig wasps: (12 possible interactions). If you exclude Section Conosycea & wasp Eupristina, and only consider the more closely related Section Malvanthera & 2 Pleistodontes wasp species on campus, there would be 7 possible interactions. Another complicating factor introduced into seedling diversity is possible hybridization between fig species pollinated by multiple wasp species each coming from at least 2 different host fig species. In fact, some authorities have speculated that host-sharing and host-switching by fig wasps may have lead to the enormous number of fig species. In host-sharing multiple fig species share the same pollinator wasp, while in host-switching a pollinator wasp evolves to use a different fig species as its primary host.

Carlos A Machado, Nancy Robbins, M Thomas P Gilbert, & Edward Allen Herre. 2005. "Critical review of host specificity and its coevolutionary implications in the fig/fig-wasp mutualism." Proc Natl Acad Sci U S A. 2005 Apr 25; 102 (Suppl 1):6558–6565. doi: 10.1073/pnas.0501840102

Gang Wang, et al. 2023. “Genomic evidence of prevalent hybridization throughout the evolutionary history of the fig-wasp pollination mutualism.” https://doi.org/10.1038/s41467-021-20957-3

Rasplus, Jean-Yves. 1996. The Biodiversity of African Plants. "The One-to-One Species Specificity of the Ficus-Agaoninae Mutualism: How Casual?" Frech National Institute for Agriculture, Food, and Environment (INRAE). doi: 10.1007/978-94-009-0285-5_78

The 2 divergent rows of ridges are apparently called ventral lamellae (I think). They are apparently useful in identification of fig wasp species. Several online references say they may help the female move or transport pollen within the syconium. This species definitely packs pollen into her pouches (corbiculae) on the underside of her thorax.