Maraplia chico, Shear & Marek, 2022

Shear, William A. & Marek, Paul E., 2022, The millipede family Striariidae Bollman, 1893. VI. Six new genera and thirteen new species from western North America (Diplopoda, Chordeumatida, Striarioidea), Zootaxa 5205 (6), pp. 501-531 : 509-511

Maraplia chico, Shear & Marek , n. sp.

Figs 12–15 , 58–60

Types: Male holotype from West Branch of Feather River , Butte Co., California, 39.8290°N, 121.7734°W, 1600’ asl, sift in goak and grape litter(sample#81-291),collected 13April1981 byD. S.Chandler; Male paratype (SEMstubWS35-7) from same locality, but collected sifting laurel litter; two male paratypes from 4 mi SE of Chico, Butte Co. , California, sifting elderberry and oak litter (sample 79-12), 39.6877°N, - 121.7734°W, 200’ asl, collected 24 February 1979 by D. S. Chandler. All specimens deposited in FMNH .

Etymology: The species epithet is a noun in apposition, after one of the paratype localities near the town of Chico, California.

Diagnosis: Differs from M. napa n. sp., in having males with 30 rings and from M. schusteri , n. sp., in the much shorter, sharply deflexed anterior angiocoxites of the gonopods ( Figs 58, 59 , aac).

Description: Male paratype. Length, about 3.5 mm, width 0.35 mm. Thirty postcephalic rings including telson. Two black ommatidia on each side of head. Color white. Telson lobes obscure ( Fig. 15 , tel). Other characters as described for the genus. Third coxae flasks ( Fig. 13 , cf) short, reaching only to fourth coxae when reflexed posteriorly.

Gonopods ( Figs 14 , 58, 59 ) small, compact. In lateral view, coxa ( Fig. 58 , cx) with about 6 or 7 setae. Coxal process broad, with deep, semicircular apical notch separating a curved, narrow anterior part from more broad, less curved posterior part. Anterior angiocoxite sharply deflexed ( Figs 14 , 58, 59 , aac), with two branches. Posterior angiocoxite in lateral view ( Fig. 58 , pac) with two branches, one of which sheaths a thick, blunt, short, gently curved flagellocoxite ( Fig 58 , fc). Colpocoxite ( Figs 58, 59 , cc) shifted anteriomesally, with anterior branch densely fimbriate, posterior part swollen, with a few small, fine triangular fimbriae. Ninth legs ( Fig. 60 ) with lateral coxosternal processes ( Fig. 60 , cp) broad at bases, with two branches, mesal branch hamate, lateral branch slightly curved, acute; sternal part with median knob, telopodite fungiform ( Figs 14 , 60 , t 9 ), bearing mesal process set with 6 or 7 ensiform setae (these setae appear socketed in SEM view.

Tenth leg coxae slightly enlarged, with glandular openings.

Females not collected.

Distribution: Presently known only from Butte County, California.

Figures

FIGURES 10–15. Striariid millipedes. Figs 10, 11. Maraplia schusteri, n. gen., n. sp. 10. Gonopods, legpair 9 and paratergite 7, oblique lateral view. 11. Coxae of legpair 2, ventral view. Figs 12–15. Maraplia chico, n. gen., n. sp. 12. Head and first two legpairs, ventral view. 13. Coxal flasks of legpair 3, ventral view. 14. Gonopods, ventral view. 15. Posterior end of male, dorsal view. Abbreviations: aac, anterior angiocoxite; c4, coxa of leg 4; c5, coxa of leg 5; cf, coxal flask of leg 3; cx2, coxa of leg 2; f1, femur of leg 1; lab, labrum; m, mandible; numerals, ring numbers; pac, posterior angiocoxite; pf, prefemur of leg 3; pt7, paratergite of ring 7; s, gonopod sternum; t9, telopodite of ninth leg; tp9, telopodite process; vcp, common opening of vas deferens.

FIGURES 56–62. Striariid millipedes. Figs 56, 57. Maraplia schusteri, n. gen., n. sp. 56. Right gonopod, mesal view. 57. Right leg 9 of male, anterior view. Figs 58–60. Maraplia chico, n. gen., n. sp. 58. Right gonopod, lateral view. 59. Right gonopod, mesal view. 60. Right leg 9 of male, posterior view. Figs 61, 62. Lamparia curryensis, n. gen., n. sp. 61. Right gonopod, lateral view. 62. Right gonopod, mesal view. Abbreviations: aac, anterior angiocoxite; cc, colpocoxite; cp, coxal process; cx, gonopod coxa; cxs, coxosternite of legs 9; fc, flagellocoxite; pac, posterior angiocoxite; s9, sternum of ninth legs; t9, telopodite of ninth leg.

FIGURES 7–9. Maraplia napa, n. gen., n. sp. 7. Female, lateral view. 8. Head and first legpair of male, ventral view. 9. Coxal flask of leg 3 of male, lateral view. Abbreviation: cf, coxal flask of leg 3.