Nototrisaria ornata 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 : 504-506

Nototrisaria ornata Shear & Marek , n. sp.

Figs 1–6 , 49–51

Types: Male holotype and male paratype from 9.6 miles up Elochoman Valley Road from Rt. 4, Wahakiakum Co., Washington, 46.289633°N, - 123.26485°W, 450’ asl, collected 28 March 2004 by C. Richart, W. Leonard; male paratype from 11.7 mi up Elochoman Valley Road from Rt. 4, 450’ asl, 46.316783°N, - 123.2617°W, 28 March 2004, collected by C. Richart; male and female paratypes from Trap Creek , 1.1 mi S of SR6, Pacific Co. Washington, 46.5468°N, - 123.6161°W, 180’ asl, collected 11 January 2003 and 3 May 2003 by W. Leonard. Parts of a male paratype are mounted on SEM stub WS3-8. Types deposited in the CAS.

Etymology: The species name, a Latin adjective, refers to the ornate dorsum.

Diagnosis: As for the genus; see above.

Description: Male paratype from Elochoman River Road. Length, 5.5 mm, width 0.6 mm (includes paranota). Thirty postcephalic rings including telson.

Head ( Fig. 2 ) densely setose, with sculpture of tiny, acute tubercles; labral corners rounded, without projecting hook. Ommatidia absent. Antennae short, robust. Mandibular stipes ( Fig. 2 , m) with sawtooth distal edge, acute apical projection. Color of live specimen white to pale yellow ( Fig. 1 ).

Collum ( Fig. 2 , col) broadly expanded, with 10 subequal crests limited to posterior two-thirds; anterior third with pebbled sculpture. Anterior rings ( Fig. 3 ) with C2 and C6 exaggerated, the latter expanded into prominent paranota with deep posterior notch; C1 reduced to a few knobs, absent on more posterior rings, C2 also progressively lower on midbody ring, exaggerated again on most posterior 6–8 rings ( Fig. 4 ). Metazonital setae not observed, probably absent. Limbus serrate.

Telson without crests, lobes deeply incised ( Fig. 4 ).

First legpair crassate ( Fig. 2 , L 1 ), larger than legpairs 2 and 3 ( Fig. 2, L2, L3 ), postfemora and tibia set with long, stiff setae, tarsus with comb. Legpair 2 relatively small, similar to postgonopodal legs. Legpair 3 with prominent, broad, slightly sigmoidal coxal flasks bearing curled setae on anterior surface ( Fig. 2 , cf); prefemora expanded, flattened. Legpairs 4–6 strongly crassate. Legpair 7 similar to pairs 4–6, but with large, flattened coxal plates covering bases of gonopods.

Gonopods in mesal view ( Figs 5 , 50 ) with anterior angiocoxites erect, narrow, hooked and expanded at tip; posterior edge with continuous fimbriate lamina, lamina ends in long distal projection; tuft of strong, thin cuticular projections subapically (aac, Figs 5 , 49, 50 ). Posterior angiocoxites as broad, rounded plate (pac, Figs 5 , 50 ). Flagellocoxites absent. Colpocoxite (cc, Figs 5 , 49, 50 ) developed as compact mass of finely divided, sinuous fimbriae with small posterior portion unmodified, sclerotized.

Ninth legpair ( Figs 6 , 51 ) strongly reduced, sternum (s9), coxae (cx) and telopodites (t9) fused; coxal part with blunt triangular process (cp), telopodite part with long, finger-like basal process bearing acute setae.

Tenth leg with enlarged, glandular coxae ( Fig 6 , cx10).

Female paratype similar to male in nonsexual characters, but exaggerated crests significantly lower. A living female specimen is depicted in Fig. 1 .

Distribution: As for the genus. The Grays Harbor County record (WASHINGTON: Grays Harbor Co.: Canyon River, 47.303517°N, - 121.508167°W, 1500’ asl, 12 December 2004, W. P. Leonard) is based on a female that strongly resembles the females from other localities.

Figures

FIGURE 1. Nototrisaria ornata, n. gen., n. sp., live female in habitat. About 5.0 mm long. Photo by Bill Leonard.

FIGURES 2–6. Nototrisaria ornata, n. gen., n. sp. 2. Anterior end of male, ventral view. 3. Rings 2–4 of male, dorsal view. 4. Posterior end of male, oblique view. 5. Right gonopod, lateral view. 6. Legpair 9 of male, anterior view. Abbreviations: aac, anterior angiocoxite; col, collum; cc, colpodoxite; c1, crest 1; c6, crest 6; cxs, coxosternite; cx10, coxa of leg 10; L1, leg 1; L2, leg 2; L3, leg 3; m, mandible; numerals, ring numbers; pac, posterior angiocoxite; t9, telopodite of leg 9.

FIGURES 49–55. Striariid millipedes. Figs 49–51. Nototrisaria ornata, n. gen., n. sp., right gonopod, lateral view. 50. Same, mesal view. 51. Legpair 9 of male, anterior view. Figs 52–54. Maraplia napa, n. gen., n. sp. 52. Right gonopod, mesal view. 53. Right gonopod, lateral view. 54. Right leg 9 of male, posterior view. 55. Right gonopod of Maraplia schusteri, n. gen., n. sp., lateral 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.