Metagonia spiders of Galapagos: blind cave-dwellers and their epigean relatives (Araneae, Pholcidae)
Por:
Huber, Bernhard A., Meng, Guanliang, Acurio, Andrea E., Astrin, Jonas J., Inclan, Diego J., Izquierdo, Matias, Valdez-Mondragon, Alejandro
Publicada:
1 ene 2022
Categoría:
Ecology, evolution, behavior and systematics
Resumen:
The spider genus Metagonia has been represented on the Galapagos Islands
by two blind species inhabiting lava tubes on Isabela and Santa Cruz.
Epigean relatives had not been found on Galapagos and were thus thought
to be extinct. During a collecting trip in 2019 we found two epigean
species and a third blind hypogean species. Here we describe these new
species based on males and females, redescribe both previously known
species, and add all five species to the recently published molecular
phylogeny of Pholcidae, together with more than 30 further congeners
from the mainland. Galapagos Metagonia is recovered as a monophyletic
group within the South American-Caribbean M. potiguar group. Galapagos
Metagonia is divided into an epigean Glade and a hypogean Glade. Each
species is restricted to an individual island (Isabela or Santa Cruz;
with one possible exception), suggesting that the epigean Metagonia
species are native rather than introduced.
Filiaciones:
Zool Res Museum Alexander Koenig, Arachnol Sect, Adenauerallee 127, D-53113 Bonn, Germany
Charles Darwin Fdn, Charles Darwin Res Stn, Santa Cruz Isl, Galapagos, Ecuador
Inst Nacl Biodiversidad, Secc Invertebrados, Quito, Ecuador
Univ Cent Ecuador, Fac Ciencias Agricolas, Quito, Ecuador
Univ Nacl Cordoba, Inst Diversidad & Ecol Anim, Avda Velez Sarsfield 299,X5000 JJC, Cordoba, Argentina
Univ Nacl Autonoma Mexico, Inst Biol, Lab Aracnol, Santa Cruz Tlaxcala 90640, Tlaxcala, Mexico
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