Description of a new species of Loxosceles Heineken & Lowe (Araneae, Sicariidae) recluse spiders from Hidalgo, Mexico, under integrative taxonomy: morphological and DNA barcoding data (CO1+ITS2)
Por:
Isabel Navarro-Rodriguez, Claudia, Valdez-Mondragon, Alejandro
Publicada:
19 ago 2020
Categoría:
Ecology, evolution, behavior and systematics
Resumen:
Based on an integrative taxonomic approach, a new species of the genus
Loxosceles Heineken & Lowe, 1832, is described from the state of
Hidalgo, Mexico. Loxosceles tolantongo sp. nov. is described based on
DNA barcoding using cytochrome c oxidase subunit 1 (CO1) and internal
transcribed spacer 2 (ITS2), and morphology. For species delimitation,
four molecular methods were implemented: 1) corrected p-distances under
neighbor joining (NJ); 2) automatic barcode gap discovery (ABGD); 3)
general mixed yule coalescent model (GMYC) and 4) Bayesian Poisson tree
processes (bPTP). The new species morphologically resembles L. jaca,
another species from Hidalgo, but there are morphological differences
mainly in the tibiae of the male palp, the seminal receptacles of the
females and also the high genetic p-distances. CO1 was more informative
than ITS2 for the genetic separation; however, both concatenated genes
(CO1 +ITS2) present robust evidence for species delimitation. Loxosceles
tolantongo sp. nov. is considered a unique species for four reasons: 1)
it can be diagnosed and distinguished by morphological characters (of
the male palps mainly, but also of the seminal receptacles of the
females); 2) the genetic p-distances with CO1 were high (>10%); 3) the
molecular species delimitation methods were congruent under CO1 and CO1
+ ITS2; and 4) under CO1 and CO1 + ITS2, the new species is a putative
sister group of L. jaca + L. tenango.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Biol, Lab Reg Biodiversidad & Cult Tejidos Vegetales LB, Lab Arachnol LATLAX, Santa Cruz Tlaxcala 90640, Tlaxcala, Mexico
Univ Autonoma Tlaxcala UATx, Ctr Tlaxcala Biol Conducta CTBC, Posgrad Ciencias Biol, Carretera Fed Tlaxcala Puebla,Km 1-5, Puebla 90062, Tlaxcala, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Colecc Nacl Aracnidos CNAN, Ciudad Univ, Mexico City 04510, DF, Mexico
|