Occidenchthonius cazorlensis / Chthonius cazorlensis

Spread the love

DESCRIPCIÓN: Tamaño mediano para el subgénero, longitud corporal 1.41-1.78 mm. Troglomorfismo débil. Escudo Prosómico sin ojos ni manchas oculares

Spread the love

Phylum Arthropoda / Subphylum Chelicerata / Classis Arachnida / Ordo Pseudoscorpiones / Subordo Epiocheirata / Superfamilia Chthonioidea / Familia Chthoniidae / Genus Occidenchthonius / Species Occidenchthonius cazorlensis = Chthonius cazorlensis


Datos principales recogidos del GEV


LOCALIDAD TIPICA: Cueva secreta de sagreo, La Iruela, Jaen.

DESCRIPCIÓN: Tamaño mediano para el subgénero, longitud corporal 1.41-1.78 mm. Troglomorfismo débil. Escudo Prosómico sin ojos ni manchas oculares; Sin microsedas proculares, sólo dos macrosedas en el borde posterior. Quelícero con seis sedas en la mano y de ninguna a dos microsedas laterales; tubérculo sedicígero muy reducido en los machos, tamaño medio y romo en las hembras; dedo movil sin diente subapical aislado. Terguitos1 En artrópodos, terguito o tergito es cada una de las placas transversales que cubren el dorso del mesosoma. Se trata de placa endurecida de cutícula que forma parte del exoesqueleto. Cada uno de los terguitos se encuentra delimitado por suturas, surcos o articulaciones, y su ornamentación puede ser variada I-IV: 4:4:4:4:6:6 sedas. Coxa 2Primer artejo o segmento de la pata de un insecto, por el cual esta se une al tórax II con 7-12 espinas, III con 3-6 espinas. Pedipalpos: mano de la quela deprimida a nivel de los tricobotrios ib-isb, seguida de una prominente y redondeada protuberancia distal; tricobotrio 3Tricobotrios (singular tricobotrio) son “vellos” alargados presentes en Arácnidos, varias clases de insectos, y miriápodos los cuales sirven para la detección de vibraciones en corrientes de aire. ist distal de esb, dedo fijo de la quela con 17-22 dientes puntiagudos, y con una lámina proximal elevada con 3-7 dientes vestigiales redondeados y sin canal dental hasta la altura del tricobotrio sb. Longitudes en mm. y ratios del pedipalpo en los machos, las hembras entre corchetes: fémur 0.68-0.78 (6.3-7 .1 x) [O. 72-0.8 (6.3-7 .1 x)], patela 0.29-0.31 (2.2-2.4x) [0.33-0.34 (2.2-‘2.4x)], quela lateral 0.93-1.03 (6.2-6.6x) [1.06-1.08 (5.9-6.1 x)], mano lateral 0.37-0.41 (2.4-2.6x) [0.42-0.44 (2.3-2.4x)], dedo móvil 0.56-0.61 [0.64-0.65], ratio dedo móvil/mano lateral 1.4-1.5x [1.5x].
4Distribución: Además de la localidad típica, se la encuentra en la Sima de la Fractura 11, Hornos de Segura (Zaragoza & Pérez, 2013).


Article 201 // Zootaxa
http://dx.doi.org/10.11646/zootaxa.3700.2.1
http://zoobank.org/urn:lsid:zoobank.org:pub:8119DAED-D7AF-4858-BC63-F082151A4DAE

Diagnosis: Weakly troglomorphic facies. Without eyes or eye-spots. Chelicera with 6 setae on palm and 0–2
microsetae laterally; movable finger without isolated subapical tooth; spinneret strongly reduced in males,
prominent in females. Carapace with two macrosetae on posterior margin, preocular microsetae absent. Pedipalp:
femur length in males 0.68–0.78 (ratio 6.3–7.1), females 0.72–0.80 (6.3–7.1×); chela length in males 0.93–1.03
(length/depth 6.2–6.6), females 1.06–1.08 (length/depth 5.9–6.1); fixed finger with 17–22 teeth, movable finger
with 14–17 teeth with dental canals reaching distad sb, closer to sb than to st, proximal raised lamina with 3–7
rounded vestigial teeth without canal; trichobothrium ist markedly distad esb.
Description. Specimens from Sima de la Fractura II. Weak troglomorphic facies; integument depigmented,
pale brown.
Carapace slightly longer than broad, slightly constricted posteriorly, subquadrate; anterior margin prominent
and medially dentate, without epistome; without eyes or eye-spots; 18 setae, without preocular microsetae, formula
4:6:4:2:2, anteromedial seta 0.11–0.13 mm long, ocular seta 0.07–0.1 mm.
Pedipalpal coxa 5 setae (including 2 on manducatory process), coxa I 3 + 3 marginal microsetae, II 4 + 7–12
bipinnate coxal spines, III 5 + 3–6 bipinnate coxal spines, IV 6; intercoxal tubercle bisetose.
Chaetotaxy of tergites I–XI 4:4:4:4:6:6:6:6:6:4:1T2T1. Genital area with 9–10 setae on sternite II in males and
9 in females; sternite III with (3)7(3) setae in females; sternite III in males with genital opening flanked by 6–10 setae on each side, 4+4 internal glandular setae and (3)9(3) marginal setae. Chaetotaxy of sternite IV–XI: (2)6–
7(2):7–8:6:6:6:6:6–8:0. Anal cone 0+2 setae.
Chelicera with 6 setae on palm and one microseta laterally (one female with 1–2 microsetae); seta gl 0.53–0.56
from base of movable finger. Fixed finger with 11 teeth, two distal teeth distinctly larger than others, proximally
reduced in size, three denticles at base. Movable finger without an isolated subapical tooth (di), with a large distal
tooth and 7–8 contiguous teeth proximally decreasing in size, two denticles on base; spinneret strongly reduced in
males, low in females.
Pedipalp with femoral chaetotaxy 3:6–7:3:5:1, four lyrifissures: 1 antiaxial and 3 paraxial. Chelal hand
markedly depressed at level of ib-isb, with a short and prominent hump distad of ib-isb and distinct ventral hollow
just before base of movable chelal finger. Fixed finger with 20–22 pointed teeth, all with dental canals except the
two distal ones small; third distal tooth from tip a little wider than others; up to ten microtubercles at base; tip of
finger with an accessory tooth (td) on antiaxial face; five teeth at level of est/it occupying 0.1 mm, distance
between apices 0.020–0.025 mm. Movable finger with 16–17 pointed teeth with dental canals, two distal ones tiny
and two-three proximal ones reduced in size; proximally with slightly raised lamina with 4–7 rounded vestigial
teeth, without dental canals, reaching to slightly proximad of trichobothrium sb, level with end of dental row of
fixed finger; five microtubercles at base. Trichobothrium ist markedly distal of esb.

Measurements and ratios. Males. Body 1.52–1.69. Carapace 0.43–0.49/0.41–0.48 (1.0). Chelicera: palm 0.44–
0.20 (2.2), movable finger 0.23. Pedipalp: femur 0.68–0.78/0.1–0.12 (6.8–7.1); patella 0.29–0.31/0.12–0.14 (2.2–
2.4); chela 0.93–1.03/0.14–0.16 (6.2–6.6), depth 0.14–0.17 (6.2–6.6); hand 0.37–0.41 (2.5–2.6), length/depth (2.5–
2.6); movable finger 0.56–0.60; ratio movable finger/hand 1.4–1.5; ratio femur/movable finger 1.2–1.3; ratio
femur/carapace 1.6; ratio chela/carapace 2.1–2.2.
Females. Body 1.58–1.78. Carapace 0.48–0.51/0.47–0.48 (1.0–1.1). Chelicera: palm 0.45–0.47/0.21–0.22
(2.1–2.2), movable finger 0.23–0.24. Pedipalp: femur 0.78–0.80/0.11–0.12 (6.9–7.1); patella 0.33–0.34/0.15 (2.2);
chela 1.07–1.08/0.18 (5.9–6.1), depth 0.17–0.18 (5.9–6.1); hand 0.43–0.44 (2.4), length/depth 0.43–0.44 (2.4);
movable finger 0.64–0.65; ratio movable finger/hand 1.5; ratio femur/movable finger 1.2; ratio femur/carapace 1.6;
ratio chela/carapace 2.1–2.2.
Distribution. Andalusia, Spain.
Remarks. We have no hesitation in assigning these specimens to C. (E.) cazorlensis. The ratio of the chelal
femur is distinctly slender in the studied sample (male 6.8–7.1, female 6.9–7.1), relative to the previously
published data: male 6.27 (Carabajal Márquez et al. 2010) and female 6.26 (Pérez & Zaragoza 2010). The other
data fit quite well.
The main difference between this species and C. (E.) perezi, its close relative, is the length of the lamina on the
chelal movable finger and the number of vestigial teeth without dental canals: short with 3–7 vestigial teeth (Pérez
& Zaragoza 2010; this paper) in C. (E.) cazorlensis and long with 9–11 vestigial teeth in C. (E.) perezi. (Carabajal
Márquez et al. 2011; this paper). The pedipalpal ratios in C. (E.) cazorlensis are also significantly higher than those
of C. (E.) perezi.
The records of Chthonius (E.) verai Zaragoza, 1985 from this cave (Pérez Fernández & Tinaut Ránera 2005;
Barranco et al. 2008; Pérez Fernández 2008; Pérez Fernández & Tinaut Ránera 2009) are misidentifications based
on C. (E.) cazorlensis.


Deja una respuesta

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *