Abstract

A new vaejovid genus from Mexico, Franckeus, gen. nov., is described based on unique neobothriotaxy. Species placed in this genus are from the Vaejovis “nigrescens” group (previously called the “nitidulus” group). Six species comprise this new genus, distributed throughout Mexico (mainland as well as Baja California Sur): Franckeus nitidulus, F. rubrimanus, F. platnicki, F. minckleyi, F. kochi and F. peninsularis. A new species of the Vaejovis “nigrescens” group, Vaejovis davidi, sp. nov., is also described.

Highlights

  • In the early 1970s Oscar Francke called to the attention of the senior author the unusual trichobothrial patterns of Vaejovis minckleyi Williams, 1968, in particular, the neobothriotaxy present on the external surface of the pedipalp patella

  • After further analysis, Francke decided that V. minckleyi was closely related to several other Mexican species that did not exhibit this unusual neobothriotaxy and did not erect a new genus at that time

  • Since Francke’s early observation of neobothriotaxy in V. minckleyi, no less than five additional species have been described from Mexico (Williams, 1980; Sissom & Francke, 1985; Sissom, 1991), each exhibiting the identical neobothriotaxy as that seen in V. minckleyi

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Summary

Introduction

In the early 1970s Oscar Francke called to the attention of the senior author the unusual trichobothrial patterns of Vaejovis minckleyi Williams, 1968, in particular, the neobothriotaxy present on the external surface of the pedipalp patella. Since Francke’s early observation of neobothriotaxy in V. minckleyi, no less than five additional species have been described from Mexico (Williams, 1980; Sissom & Francke, 1985; Sissom, 1991), each exhibiting the identical neobothriotaxy as that seen in V. minckleyi. These species are widely distributed in the eastern Mexico (from north-eastern to central eastern states) as well as in Baja California Sur. Soleglad & Fet (2003: 41, Fig. 80) stressed the importance of the unusual neobothriotaxy found in these species

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