Phonotimpus calenturas Platnick & Chamé-Vázquez & Ibarra-Núñez 2022, sp. nov.

Phonotimpus calenturas sp. nov.

Figures 277–279, 327–330

Type material. Female holotype from the Sótano de las Calenturas [23.9054488°N, 99.4202091°W], Yerbabuena, Purificación area, Tamaulipas, Mexico (Apr. 28–29, 1980; P Sprouse et al.), deposited in AMNH.

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Although taken in a cave that also houses P.arcitos sp. nov., this species is not a member of the eutypus group. Indeed, judging by the substantial pigmentation, it may be a surface species only incidentally occurring in the cave. Females can be recognized by the small epigynum, the pair of small, round copulatory openings situated at the posterior end of the epigynum, leading to narrow copulatory ducts, directed anteriorly, bursae elongated; oval primary spermathecae contiguous to copulatory ducts, touching the posterior epigynal margin (Figs 277–279).

Description. Male: Unknown.

Female (holotype): Total length 1.63. Carapace yellow, with dark maculations radiating from lateral margins, opposite each leg, toward thoracic groove, median area without maculations, pars thoracica gently sloping, pars cephalica sloping evenly from thoracic groove to clypeus; sternum, mouthparts yellow, unmarked, except each cheliceral paturon anteriorly darkened, with two strong, erect bristles near base; abdomen narrow, dorsum dark gray, with vague traces of four white chevrons on posterior half, followed posteriorly by larger white chevron above spinnerets, scutum small, triangular, restricted to cardiac area, narrowed posteriorly, where occupying only about one-seventh of abdomen width at that point, sides dark gray, with oblique, longitudinal rows of small white spots, venter white, unmarked (Figs 327–330); legs yellow, femora, patellae, tibiae with dusky markings over most of their surface. Leg spination: femora: I d1-0-0, p0-0-2; II–IV d1-0-0; tibiae: I v4-4-4; II v4-4-1p; metatarsi I, II v2-2-3.

Epigynum small, with pair of small, round copulatory openings set at posterior margin, separated by about their diameter; copulatory ducts sinuous, as long as primary spermathecae, extending anteriorly; bursae elongated, anteriorly directed, contiguous; oval primary spermathecae situated laterally and contiguous to copulatory ducts; secondary spermathecae fingerlike arising at union of copulatory duct and spermatheca; fertilization ducts arising latero-posteriorly (Figs 277–279).

Distribution. Known only from the Sótano de las Calenturas, in the Purificación area, Municipio de Güémez, Tamaulipas (Fig. 339).