Scorpionidae (Vachon, 1963)

Afifeh, Bassam Abu, Yağmur, Ersen Aydın, Al-Saraireh, Mohammad & Amr, Zuhair, 2024, Revision of the genus Scorpio in Jordan, with a description of a new genus and three new species (Scorpiones: Scorpionidae), Euscorpius 391, pp. 1-66 : 64

Key to Family Scorpionidae in Jordan

1. External surface of chela manus densely covered with large, raised, rounded and somewhat pointed granules, the posterior margin of the external surface of chela manus bears very large spinoid protrudings, chela fingers granulated with small, pointed, gradually decreased granules anteriorly, Chela manus elongated (Manus Length/Chela Depth (1.24–1.29) ( Fig. 1 ). ........................ .............................................. Jordanius gen. n. ……… 2

– External surface of chela manus is almost smooth, or covered with isolated, rounded, or flattened, and sometimes with reticulated fused granules, chela fingers smooth, chela manus inflated (Manus Length/Chela Depth (1.0–1.18) ( Fig. 2 ). .. Scorpio Linnaeus, 1758 … 3

2. Coloration generally dark yellow to light yellowish brown, external surface of chela manus with moderately dense and generally small granulation. ............................ .............................. Jordanius maysaraensis gen. et sp. n.

– Coloration generally reddish brown, external surface of chela manus with dense, large and somewhat pointed granulation ............... Jordanius granulomanus , comb. n.

3. Metasomal segment II usually longer than wide, or sometimes as long as wide, generally dark coloration, adult total length> 60 mm. ............................................ 4

– Metasomal segment II always wider than long, generally light coloration, adult total length <55mm. ..................... ................................................ Scorpio jordanensis sp. n.

4. The basal median lamellae of pectines is narrowly triangular in shape, pectines extending well beyond coxa-trochanter articulation of leg IV, general coloration reddish yellow to olive brown in male, reddish brown to reddish black in females. ............ Scorpio wahbehi sp. n.

– The basal median lamellae of pectines are broadly triangular in shape, pectines extending approximately to the coxa-trochanter articulation of leg IV, general coloration dark reddish brown to brownish black. ........... .................................... Scorpio fuscus (Ehrenberg, 1829)

Figures

Figures 1–2: External view of chela under UV light showing variation in shape, slenderness, and pattern of granulation between Jordanius, gen. n. and Scorpio. Figure 1. Jordanius granulomanus comb. n., female paratype. Figure 2. Scorpio jordanensis sp. n., female paratype. Abbreviations: Manus Length (ML), Chela Depth (CD).