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FAMILY VAEJOVIDAEGenus ParavaejovisGenus ParuroctonusGenus PseudouroctonusGenus SerradigitusGenus SmeringerusGenus Syntropis

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Syntropis macrura Kraepelin 1900

Syntropis macrura Kraepelin, 1900: 16-17; Kraepelin, 1901: 274; Werner, 1934: 281; Gertsch, 1958: 14-15; Stahnke, 1965: 257-263, fig. 1, 2; Williams, 1969a: 285, 290-291; Stahnke, 1974a: 120; Hjelle, 1974: 221-226; Vachon, 1974: fig. 140, 148-150; Díaz Najera, 1975: 6, 12; Williams, 1980: 47-48, fig. 49, 50, 108B; Kovarík, 1998: 146; Beutelspacher, 2000: 70, 136, 152, map 43; Sissom, 2000:526; Soleglad & Fet, 2003b: 6, fig. 7; Soleglad & Fet, 2003a: 8, 67, 162; Prendini & Wheeler, 2005: Fig. 24; Soleglad, Lowe & Fet, 2007, 119-123, 128-133, Fig. 1, 24–25, 31–32; Tables I–II.

HOLOTYPE:  Syntropis macrura Kraepelin holotype (male) (Museum National d'Histoire Naturelle, Paris), “Lower California, L. Diguet.", México.

Original description: Syntropis macrura Kraepelin, 1900: 16-17.

subsequent accounts:
Williams (1980):

"Diagnosis. Adults to about 80 mm long; adults with base color of cuticle rusty brown; pedipalp fingers dark reddish brown; juveniles with base color of cuticle light yellow, pedipalp fingers light yellow; metasoma with ventromedian keels smooth on segments I and II, smooth to crenulate on III, irregularly crenulate on IV and V; metasomal segments each longer than wide; telson with elongate vesicle, short aculeus; pedipalp with long slender fingers, 6 supernumerary granules on fixed finger, 8 supernumerary granules on movable finger; movable pedipalp finger longer than carapace, fixed finger equal to or longer than carapace; pedipalp fingers terminate distally with elongate terminal tooth; chelicera with ventral margin of movable and fixed fingers lacking denticles; pectine teeth 26-32 in males, 24-31 in females."

Soleglad, Lowe & Fet (2007):

"DIAGNOSIS. Large sized species, reaching 90 mm in adult females and 100 mm in adult males. Overall coloration is a rusty brown; chelal fingers much darker color than the palm. Pectinal tooth counts 27–31 in female and 29–32 in male. Pedipalpal femur and patella are 5.8 and 5.2 times longer than wide in adult females and 7.3 and 7.1 in males; metasomal segment V is 5.3 times longer than wide in adult females and 7.1 in males; telson vesicle is 2.7 times longer than deep in females and 3.4 in males."

distribution: NORTH AMERICA. México (Baja California Sur and associated islands).  Williams (1980) reported the range as San Ignacio south to Los Aripes near La Paz, and Isla Carmen.  Soleglad, Lowe and Fet, (2007) restricted the range to the Sierras Guadalupe and de la Giganta (San Ignacio to San Miguel Comondú, and Isla del Carmen in the Sea of Cortez), Baja California Sur, Mexico  View Map

Published Records:  Baja California Sur, Mexico: San Ignacio, 26-VI-1968 (Williams. Cazier): 56.8 km NW Los Aripes, 27-VII-1968 (Williams. Bentzien. Bigelow); 24.1 km NW Los Aripes, 27-VII-1968 (Williams. Bentzien. Bigelow); Isla Carmen, Puerto Balandra. 23-III-1971 (Lee); Isla del Carmen, Ensenada Marques, 17 May 1982 (Sissom); 13 km SW San Miguel Comondú, 3-VII-1968 (Williams. Cazier).

notes:  Beutelspacher (2000: 136) erroneously listed Syntropis macrura for Baja California (Norte) rather than for Baja California Sur.
Williams (1980) noted:

"This species is adapted to volcanic habitats where it utilizes the spaces between fractured rocks for shelter. Most specimens found were on more or less vertical cliffs, often high above the ground. In the Comondu area this species has invaded rock walls built by residents in the bottom of the arroyo to keep goats out of farm lands. It does not generally spend much time in exposed situations, even during nocturnal hours.
Juveniles appear much different from adults. They are uniformly pale yellow and lack the contrasting color markings of adults, their metasoma is not as elongate, and their telson is not elongate.
Some geographical variation was evident. The Comondu populations were very much like those taken on Isla Carmen except that the vesicle of the island population was slightly less hirsute. Other than this, the two populations seemed essentially the same and corresponded with the description of the holotype. Adult specimens taken at the southern end of the Sierra Giganta appeared different from the Comondu population as follows: lighter coloration (perhaps reflecting the general lighter coloration of their habitat); adult males had metasomal segment V 5.2 times longer than wide (instead of 7 times longer); adult females had metasomal segment V 4.0 to 4.3 times longer than wide (instead of 5.2 times longer); pectine teeth of males were 26-28 (not 29-32); pectine teeth of females were 24-26 (not 27-31); vesicle was less elongate and more swollen in both sexes."


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