Serratochaerilobuthus schmidti Lourenço, 2024

Serratochaerilobuthus schmidti Lourenço sp. n.

( Fig. 1-11)

ZooBank:https://zoobank.org/ AC18400E-5F9C-4145-AF9E-1653036C339F

Holotype. – Most certainly an adult female.

Type locality and horizon. – Myanmar ( Burma), Kachin; precise locality unknown; Lower Cretaceous.

Patronym. – The specific name honors Mr Andrè Schmidt (Zofingen, Switzerland) who supported the present study.

Repository. – The type specimen is deposited in the collection of Mr Andrè Schmidt ( Zofingen Switzerland) .

Description

Coloration. –The scorpion is reddish-yellow to brownish-yellow with some dark reddish zones; carapace brownish; tergites and sternites brownish-yellow; metasomal segments brownish; telson reddish-brown to reddish-yellow; pedipalps reddish-brown; legs yellow with brownish spots. Ventral aspect paler than dorsal aspect; pectines yellowish-brown.

Morphology. – Carapace without granulations; almost smooth; anterior margin with a weakto moderate median concavity. Carinae and furrows weak or absent. Median ocular tubercle totallyabsent;median eyes absent; possible presence of one or two reduced lateral eyes. Sternum approximately pentagonal and conspicuous, slightly larger than long. Mesosomal tergites not granular as carapace and with vestigial carinae; VII not well observable. Pectines are well observed, but extremely small and with 5-5 teeth; fulcra absent; the zone with peg sensillae can be observed on some teeth. Sternites can be roughly observed since they partially suffered with the dissection process; almost smooth, with spiracles small and rounded in shape. Metasomal segments I to IV with 10-10-10-8 observable carinae; segment V with 5 carinae; dorsal carinae on segments I-V with strong spinoid granules forming serrulas; ventral carinae on segments I-V equally with strong spinoid granules; setation on segments I to V weak. Telson with a moderately to strongly bulbous vesicle and a long but moderately curved aculeus; globally weakly granular to smooth but with spinoid granulations on ventral carina; setation strongly marked. Cheliceral dentition not observed. Pedipalps moderately elongated;femur pentacarinate with two strong spinoid apophysis on internal face; patella with dorso-internal, ventro-internal, dorso-external, external and ventral carinae; two spinoid apophysis on internal face, stronger thatthoseof femur.Chela with moderatelyto weaklymarked carinae;allfaces weakly granular to smooth; internal face with some spinoid granules. Fixed and movable fingers with 7-8 series of moderate to strong granules separated by marked spinoid accessory granules; extremity of fingers with one stronger spinoid granule. Trichobothriotaxy: a trichobothrial pattern related to those of both buthoid andchaeriloids, typesAand B can be observed (Vachon, 1974); for details see diagnosis. Legtarsi with a few long and thin ventral setae. Very long and sharped ungues.Pedal spurs present and weakly marked; tibial spurs absent.

Morphometric values (mm), holotype of Serratochaerilobuthus schmidti Lourenço gen. n., sp. n.

– Total length (including telson) 6.43.

– Carapace length 0.91,

anterior width 0.57,

posterior width 0.85.

– Mesosoma length 1.64.

– Metasomal segments

I: length 0.31, width 0.47;

II: length 0.36, width 0.44;

III: length 0.43, width 0.44;

IV: length 0.57, depth 0.37;

V: length 1.07, depth 0.37.

– Telson length 1.14.

– Vesicle depth 0.37.

– Pedipalp femur length 0.84, width 0.31;

patella length 0.94, width 0.32;

chela length 1.51, width 0.41;

movable finger length 0.81.

Second species also examined during this study