Juxtlacampa juxtlahuacensis Wygodzinsky, 1944

Sendra, Alberto, Palacios, Jose, Garcia, Arturo & Montejo, Maira, 2016, New Species of Campodeidae (Diplura) from Mexican caves, Zootaxa 4072 (5), pp. 540-558 : 551

Juxtlacampa juxtlahuacensis Wygodzinsky, 1944

( Figs. 22‒25 , 29‒33 , 34 )

Redescription from neotype material. Although the description by Wygodzinsky (1944) of J. juxtlahuacensis was accurately done and well-illustrated, a new redescription is needed with details of macrosetae, epicuticle, sensilla of the head and antennae, glandular setae on urosternite I and telotarsal morphology.

Body length of five females 3.5‒5.7 mm, length of five males 3.3‒4.2 mm ( Fig. 34 ). Epicuticle with dense, thin microspines; body with numerous clothing setae covered by short, thick barbs ( Fig. 24 ).

Antennae with 28 or 29 antennomeres, six antennae apparently intact but with sensilla of cupuliform organ deformed, suggesting regenerated antennae. Sensillum of third antennomere subcylindrical, sharply pointed, located in ventral position between macrosetae d and e. Central antennomeres 2.5 times longer than wide in larger adults, twice longer than wide in medium-sized adults, and 1.4 times longer than wide in the smallest adults and juveniles. Gouge sensilla ( Fig. 22 , 29‒31 ) atypical, being shorter than those of typical troglomorphic species, with 10‒12 Μm long in a single distal whorl of about 12 sensilla on each medial and distal antennomere. Frontal process slightly developed ( Fig. 23 ), with one apical and two posterior short, thick macrosetae with small, thick barbs. Three macrosetae along line of insertion of antennae and x setae, in female neotype (length 5.0 mm) length ratios as a = 0.56, p = 0.58, i = 1, x = 0.51; all covered with thick barbs along the distal half. Labial palp subtriangular, with subcylindrical latero-external sensillum ending in blunt tip, with two guard setae, up to 18 setae on the anterior border and up to 80 neuroglandular setae.

Thoracic macrosetae distribution ( Fig. 24 ): pronotum with 1+1 ma, 1+1 la, 1+1 lp; mesonotum with 1+1 ma; metanotum without macrosetae. All macrosetae short, heavy, covered by thick barbs; marginal setae thicker and longer than clothing setae, mostly covered by thick barbs. Legs slightly elongated, metathoracic legs reaching abdominal segment VIII. Femur III without dorsal macrosetae. Tibia III without ventral macrosetae. Calcars well barbed from base to tip with long barbs. Dorsal and lateral tarsal setae completely covered by thin barbs almost from their base. Subequal elbow-like claws with short extension at the basal end of the posterior claw; lateral crests well developed, noticeably ridged on ventral side and very slightly on dorsal side ( Fig. 32 ). Telotarsal process laminar in basal portion with long ventral pubescence, becoming larger in distal portion and covered with long foliate barbs on ventral side ( Fig. 33 ).

Distribution of abdominal macrosetae on tergites: 2+2 post VIII and 4+4 post IX, all of them long and well barbed along the distal two-thirds. Urosternite I with 15‒17+15‒17 thick macrosetae with long barbs; urosternites II to VII with 7+7 macrosetae, urosternite VIII with 2+2 macrosetae. Apical setae of styli with basal tooth divided in two branches and completely barbed with thin barbs; subapical and medial sternal setae barbed. One cercus regenerated but complete, length 11.7 mm in paraneotype male 4.2 mm long, with 25 articles plus base; each article progressively longer and covered with increasing numbers of whorls (4 up to 20) of barbed macrosetae.

Male urosternite I ( Fig. 25 ) with two very large bacilliform appendages, each bearing more than 110 a1 - glandular setae in a large field, and more than 100 a2 -glandular setae in another large field that starts at the base of the appendages; marginal field very large with more than 180 g 1 -glandular setae. In largest neoparatype males these appendages 0.35 mm long in males of 4.1 mm and 4.2 mm body length; in adults with well developed genital papilla and body lengths of 3.9 mm and 3.3 mm these appendages 0.2 mm and 0.13 mm long, respectively, and supporting only 6‒10 each of a1, a2 and g1 glandular setae. Female ursoternite I with thick subcylindrical appendages, in neotype with distal portion thinner and with 8 “a1-glandular setae.

Type material. Wygodzinsky (1944) did not indicate where type material was deposited and none could be found in any American or Mexican collections. Designation of a neotype is warranted, as follows: Neotype female, four female and five male paraneotypes from “Grutas de Juxtlahuaca”, 99° 07’ N, 17°25’ W, located in Xotlametzi limestone hill at Quechultnango,Guerrero, México, 8 IX 2014, O. Moldovan leg., mounted in Hoyer’s solution, deposited in UNAM.

Figures

FIGURE 25. Juxtlacampa juxtlahuacensis. Urosternite I of the male.

FIGURE 34. Juxtlacampa juxtlahuacensis from “ Grutas de Juxtlahuaca ”, Guerrero, Mexico.

FIGURES 22 ‒ 24. Juxtlacampa juxtlahuacensis. 22) Gouge sensillum. 23) Frontal process. 24) Chaetotaxy of pronotum and mesonotum, right side.

FIGURES 29 ‒ 33. Juxtlacampa juxtlahuacensis. 29) Medial antennomere showing a distal verticillum of gouge sensilla. 30) Detail of the external-distal portion of an medial antennomere showing six gouge sensilla. 31) Gouge sensillum. 32) Telotarsus. 33) Detail of the end of the telotarsal process.