Lamparia pratensis 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 : 514

Lamparia pratensis Shear & Marek , n. sp.

Figs 26–29 , 66–68

Types: Male holotype from Grassy Flat Campground, Rt. 199, 5 mi by road E of Gasquet , Del Norte Co., California, 41.8564°N, - 123.8890°W, 700’ asl, collected 25 March 1976 by A. K. Johnson. The specimen is mounted on SEM stub WS35-10, deposited in FMNH .

Etymology: The species epithet is a Latin adjective, meaning “of the meadow,” and refers to Grassy Flats, the type locality.

Diagnosis: Very similar to the L. millicoma n. sp., but distinct in the form of the ninth legs, which lack the expanded coxosternum, the median coxosternal knob, and the curved coxosternal process. Instead, there is a smaller triangular coxosternal process (compare Figs 68 and 71 ).

Description: Male holotype. Length, 5.0 mm, width 0.45 mm. Two black ommatidia on each side of head. Sixth crests well extended as broad paranota ( Figs 26, 27 ). Telson lobes nearly completely suppressed ( Fig. 29 , tel). Metazonital setae not seen, absent or concealed by heavy cerotegument. Color after long preservation medium brown. Flasks of third coxae short, when extended posteriorly reaching only to anterior margin of fifth coxae. Other characters as described for genus.

Gonopods ( Figs 66, 67 ) moderately large. Coxae with 3 setae, bulbous, with acute angle distally ( Fig. 66 , cx). Anterior angiocoxites narrow, erect, with slightly expanded, curved tip, posterior and anterior surface finely fimbriate from base to about half length of coxite ( Figs 66, 67 , aac). Posterior angiocoxite much reduced; flagellocoxite not sheathed. Flagellocoxite ( Figs 66, 67 , fc) single, thin, short. Colpocoxite bulbous, shifted anteriomesally, set with a few triangular, fine cuticular teeth ( Fig. 67 , cc). Ninth legs ( Fig. 68 ) with coxosternum. Coxosternal processes flattened, long, bluntly triangular ( Fig. 68 , cp), arising near midline. Telopodites ( Fig. 68 , cp) free, rounded, with projecting posterior lobe. Tenth coxae not much swollen, gland openings anteriodorsal.

Females not collected.

Distribution: Known only from the type locality.

Figures

FIGURES 25–29. Striariid millipedes. 25. Coxae of legpairs 3–6 of male Lamparia bentonensis, n. gen., n. sp., ventral view. Figs 26–29. Lamparia pratensis, n. gen., n. sp. 26. Ring 14 of male, posterior view. 27. Rings 3–5 of male, dorsal view. 28. Prefemur of leg 3 of male, lateral view. 29. Telson and paraprocts of male, lateral view. Abbreviations: cf, cosal flask of leg 3; cx5, coxa of leg 5; cx6, coxa of leg 6; c1–6, crests 1 to 6, respectively, numerals, ring numbers; pf4, prefemur of leg 4; tel, telson.

FIGURES 63–70. Striariid millipedes. Figs 63–65. Lamparia bentonensis, n. gen., n. sp. 63. Right gonopod, lateral view. 64. Right gonopod, mesal view. 65. Male legpair 9, posterior view. Figs 66–68. Lamparia pratensis, n. gen. n. sp. 66. Right gonopod, lateral view. 67. Right gonopod, mesal view. 68. Male right leg 9, posterior view. Figs 69, 70. Lamparia millicoma, n. gen., n. sp. 69. Right gonopod, lateral view. 70. Right gonopod, mesal view. Abbreviations: aac, anterior angiocoxite; cc, colpocoxite; cp, coxal process; cx, gonopod coxa; fc, flagellocoxite; pac, posterior angiocoxite; s9, sternum of ninth legs; t9, telopodite of ninth leg.

FIGURES 71–78. Striariid millipedes. 71. Right leg 9 of male Lamparia millicoma, n. gen., n.sp., anterior view. Figs 72– 75. Rampalia cheathamensis, n. gen. n. sp. 72. Right gonopod, lateral view. 73. Right gonopod, mesal view. 74. Male ninth legpair, anterior view. 75. Male ninth legpair, posterior view. Figs 76–78. Plaramia arcata, n. gen., n. sp. 76. Right gonopod, lateral view. 77. Right gonopod, mesal view. 78. Left leg 9 of male, anterior view. Abbreviations: aac, anterior angiocoxite; cc, colpocoxite; cxp, coxal process; cx, gonopod coxa; fc, flagellocoxite; pac, posterior angiocoxite; t9, telopodite of ninth leg.