Procheiridium judsoni Porta, Michalik & Proud, 2020

Porta, Andrés O., Michalik, Peter, Franchi, Ezequiel & Proud, Daniel N., 2020, The first fossil pycnocheiridiine pseudoscorpion (Pseudoscorpiones: Cheiridiidae Procheiridium gen. nov.) from Cretaceous Burmese amber, Zootaxa 4801 (1), pp. 142-150 : 146-147

† Procheiridium judsoni Porta, Michalik & Proud n. sp.

Figs 1–5

Etymology. The new speccies is named in honor of Dr. Mark L. I. Judson who contributed to the phylogeny and paleobiology of the superfamily Cheiridioidea .

Type material. Holotype ( MLP 36246), apparently adult based on the sclerotization, and probably a male based on the morphology of the galea. Preserved in a single amber sample collected from the Hukawng Valley of Kachin Province, northern Myanmar; lowermost Cenomanian, mid-Cretaceous ( Grimaldi et al., 2002, Shi et al., 2012).

Type locality. Hukawng Valley southwest of Maingkhwan in Kachin

State (26º20’N, 96º36’E), Myanmar .

Diagnosis. Same as the genus.

Figures

FIGURE 1: Procheiridium judsoni n. gen. et n. sp., holotype (MLP 36246): A. Carapace; B. Tergites 1–3 showing details of the surface; C. Right palpus, femur, dorsal view; D. Habitus, dorsal; E. Detail of the lateral setae of the last tergites; F. Right palpus, femur, ventral view, with details of the setae; G. Left chela, ventral view of the hand; H. Same view of the moveable digit; I. Same view of the articulation. Scale bars: A, 0.2 mm; B, 0.05 mm; C, 0.2 mm; D, 0.5 mm; E–G, 0.05 mm; H, 0.1 mm, I, 0.05 mm.

FIGURE 2: Procheiridium judsoni n. gen. et n. sp., holotype (MLP 36246): A. Habitus, ventral; B. Right coxae; C. Manducatory process; D. Anal plate and last sternites; E. Left leg IV, junction between femur and patella. Scale bars: A, 0.5 mm; B, 0.2 mm; C, 0.05 mm; D–E, 0.1 mm.

FIGURE 3: Procheiridium judsoni n. sp., holotype (MLP 36246): A. Carapax; B. Right chelicera; C. Rallum; D. Right Coxae, E. Right leg I; legs not belonging to the holotype in the same amber sample: F. Right leg III; G. Right leg IV. Scale bars: A–B, 0.2 mm; C, 0.01 mm; D–G, 0.2 mm.

FIGURE 4: Procheiridium judsoni n. gen. et n. sp., holotype (MLP 36246): A. Right chela, dorsal view; B. Left chela, ventral view; C. Right palpus, trochanter to patella, ventrolateral view. Scale bars: A–C, 0.20 mm.

FIGURE 5: Procheiridium judsoni n. gen. et n. sp., holotype (MLP 36246): A. Right leg I, ventral view; B. Right tarsus III; C. Right tarsus II distal portion; D. Right chelicera and detail of the galea; E. Left chelicera, ventral view, showing rallum (arrow); F. Same, detail of rallum (arrow). Scale bars: A, 0.2 mm; B–D, 0.05 mm; E, 0.1 mm; F, 0.05 mm.