Dawydoffia siphonocryptida, Wesener & Moritz & Akkari, 2023

Wesener, Thomas, Moritz, Leif & Akkari, Nesrine, 2023, Integrative redescription of the sucking millipede genus Dawydoffia Attems, 1953 with a description of a new species and a transfer to the family Hirudisomatidae (Diplopoda, Polyzoniida), Zootaxa 5263 (3), pp. 411-429 : 422-423

Dawydoffia siphonocryptida new species

Figures 6–9

Etymology: The first author’s first thought was, when observing this species, that it belongs to the Siphonocryptida, whose members resemble this species in their habitus. Noun in apposition.

Material examined:

Holotype: 1 ♁, SMF, broken and utilized for SEM and genetic sampling. Laos, Luang Prabang Prov., SE Luang Prabang, Nam Khan, Xien Ngeun Dist., Ban Keng Koung , 372 m, 19°40'96.3'' N, 102°18'44.2'' E, disturbed forest, valley, waterfall, forest soil, pitfall trap, leg. P. Jäger 21– 28.2.2008.

Paratypes: 1 ♀, SMF, same data as holotype, but coll. by Winkler extraction, leg. P. Jäger, 23.2.2008 ; 1 ♀, SMF, Laos, Luang Prabang Prov., SE Luang Prabang, Nam Khan , between Ban Khon Why and Xieng Ngeun, Houay Tham, 363 m, 19°44'51.2'' N, 102°13'15.4'' E, along stream, leaf litter at rocks, daytime, sieving, leg. P. Jäger, 24.3.2007 ; 1 ♀, ZFMK MYR 12266 , same data as previous .

Diagnosis:

D siphonocryptida n. sp. differs from D. kalonota in the coloration: body white, with black stripe starting at tergite 3 (body red-brown, with conspicuous black-brown stripe running from collum to anal segment in D. kalonota ). It also differs from D. kalonota in the number of conical protuberances on the second sternite (4 versus 2) and in the posterior gonopod, with podomere 2 being the largest, as long as (but wider then) podomeres 3 and 4 combined (in D. kalonota with podomere 3 being larger than 2, cylindrical, as long as 4 and 5 combined).

Figures

FIGURE 6. Dawydoffia siphonocryptida n. sp., female paratype (SMF), volume rendering based on µCT-data.A. Habitus lateral view. B. Head and anterior body, ventral view. C. Telson and posterior body, ventral view. Abbreviations: At = Antennae; Co = collum; ep = epicranium; fh = forehead; oz = ozopore, Pl = pleurite; St = sternite; T = tergite; Te = telson; Vu = vulva.

FIGURE 7. Dawydoffia siphonocryptida n. sp., male holotype (SMF), scanning electron micrographs (SEM). A. Anterior body, lateral view. B. Anterior body, ventral view. C. Frontal view of specimen. D. Detail of labrum and gnathochilarium, apical view. E. Anterior segments showing fused tergites-pleurites. F. Head, lateral view. G. Right antenna, ventral view. H. Apical tip of right antenna. Abbreviations: aG = anterior gonopod; CO = collum (tergite 1); d = antennal disc; gn = gnathochilarium; La = labrum; ms = macrosetae; O = ommatidium; oz = ozopore; pG = posterior gonopod; sb = sensilla basiconica. Arabian numbers refer to number of leg pair, tergite or antennomere.

FIGURE 8. Dawydoffia siphonocryptida n. sp., male holotype (SMF), scanning electron micrographs. A. Posterior body end, dorsal view. B. posterior body end with telson, ventral view. C. First tarsal claw. D. Leg 5, tarsal claw. E. Hirudisoma roseum (Victor, 1839), ZFMK MYR11859, midbody leg, tarsal claw. F. Midbody leg, posterior view. Abbreviations: Cx = coxa; cp = coxal pouch; Fe = femur; Go = tip of male gonopore; oz = ozopore; P = pleurite; paro = paronychium; Po = postfemur; Pre = prefemur; St = sternite; T = tergite; Ta = tarsus; Ti = tibia; tr = trochanter.

FIGURE 9. Dawydoffia siphonocryptida n. sp., male holotype (SMF), scanning electron micrographs. A. Sternite 1 and 2, coxa of leg pair 2 with gonapophysis or pseudopenis, ventral view.Arrows point to sternal protuberances. B. Left gonapophysis or pseudopenis, ventral view. C. Anterior and posterior gonopod, lateral view. D. Gonopods, anterior view. E. Anterior and posterior gonopod, posterior view. F. Detail of podomere 5, posterior gonopod. Abbreviations: aG = anterior gonopod; aG-P = process on anterior gonopod; cp = coxal pouch; Cx = coxa; H = head; LP –= lateral process of podomere 6 of anterior gonopod; MP = mesal process of podomere 6 of anterior gonopod; pG = posterior gonopod; PP = pseudopenis; St = sternite; St-p = sternite process.