Caseya richarti, Shear, William A. & Leonard, William P., 2007

Shear, William A. & Leonard, William P., 2007, Additions to the milliped family Caseyidae. I. Caseya richarti, n. sp., and new records of previously described species in the genus Caseya Cook and Collins 1895 (Diplopoda, Chordeumatida, Caseyidae), Zootaxa 1524, pp. 23-34 : 26-31

Caseya richarti , new species

Figs. 2–10

Types: Male holotype, one male and two female paratypes from WASHINGTON: King Co.: Holder Creek, 1.5 miles north of Hobart, Issaquah exit on Route 18, N47°27.135’, W121°57.217’, elevation 700’ asl, 25 February 2004, W. P. Leonard, C. Richart (FMNH). Male paratype from same state and county, Interstate Highway 90 at Snoqualmie River, Twin Falls/Iron Horse trailhead, N47° 23.86', W121° 29.02', elevation 1250’ asl, 25 February 2004, W. P. Leonard, C. Richart (FMNH).

Diagnosis: Similar to, and sympatric only with C. borealis , from which it can be distinguished by the form of the gonopod. In richarti , the angiocoxite has a nearly deltoid terminal process; this is missing in borealis . The angiocoxite of borealis has a strong distoventral hump which causes the terminus of the coxite to be directed dorsally; in richarti the curve of the anterior edge of the angiocoxite is smooth and even. Seen in lateral view, the angiocoxite of richarti also has a much stronger lateral flange than in borealis , while in richarti the mesal flange or process is much stronger than in borealis . The terminal process in richarti somewhat resembles that of Caseya paradoxa G & S, but the rest of the gonopod looks entirely different, and paradoxa is far to the south in Mariposa Co., California. Coloration is also slightly different between richarti and borealis , but this may be variable. In borealis , the impression is of a light tan base color with two narrow, paramedian purplish-brown stripes and a purplish-brown spot on the ventrolateral edge of each metazonite; in richarti the ground color is a little darker, the stripes much wider, and the spots much larger. In the field richarti gives the impression of a dark animal with a pale median stripe. The anterior five segments and head of richarti are nearly all darker purplish-brown, and in borealis the striping extends much further anteriorly. While females of borealis also show the striped pattern, females of richarti are entirely dark, and in the field show no apparent pale median stripe. Females may also be separated by the two processes on the cyphopod receptacle in richarti ; these are absent in borealis .

Description: Male: 10 mm long, 1.0 mm wide. Oval eyepatch with 22 ocelli. Color pattern as described above in Diagnosis. Second legs ( Fig. 5 ) with gonapophyses shorter than telopods, apically hooked, densely setose, telopods with six podomeres, reduced in size. Third legs ( Figs. 5, 6 ) with large, blocky sternum, coxae with anteriorly projecting, flattened lobe more massive than telopods, body of coxa extends beyond coxa/trochanter articulation to setose tip; coxal lobe densely setose anteriorly, glabrous posteriorly but with subapical group of long, decurved setae; lobe appears only lightly sclerotized mesally. Legs 4 and 5 normal. Coxae 6 somewhat enlarged. Seventh legs ( Figs. 4, 7 ) with enlarged, elaborately lobed coxae; posterior basal lobe lightly sclerotized, lateral apical process with pore near tip, mesoapical lobe blunt, curved.

Gonopods in lateral view ( Fig. 3 ) with single seta posterior on sternal plate, lateral lamella apically bifurcate, with basal setal group. Angiocoxite with strongly projecting lateral shelf, anterior row of four long setae; terminus complex but with prominent subdeltoid apical process densely set with short cuticular fimbriae. In mesal view ( Fig. 2 ), mesal lamella bifurcate but distal bifurcation much broader than proximal, colpocoxite with membranous basal region, colpocoxite lamella typical of genus, sheathing double-branched flagellocoxite. Angiocoxite bearing two mesal subapical branches, anteriormost knoblike, posteriormost curved, itself two-branched.

Ninth legs ( Fig. 9 ) typical of Caseya species; coxal process very similar to that of C. borealis ; telopodite swollen, oblate-reniform. Tenth leg coxae ( Fig. 8 ) in posterior view with posteriorly directed processes and median setose region, broadly expanded laterally, openings of coxal glands on anterior side.

Female: 10 mm long, 1.1 mm wide. Oval eyepatch with 22 ocelli, color entirely dark purplish brown with slightly lighter mottling. Legpair 3 with elongate coxae; sternum produced laterally, with triangular median process. Cyphopod receptacle U-shaped, with two processes, the lateral broadly flattened laterally, the mesal finger-like; both setose on posterior surface ( Fig. 10 ).

Etymology: It is our pleasure to dedicate this species to Casey Richart, which required the addition of only two letters to his full name. Richart has accompanied WPL on many collecting trips, and secured all of the known specimens of this new species. We wish him well as he embarks on a promising career in systematic biology.

Notes: The intensive collecting mentioned above has been confined mostly to the Coast Ranges, with occasional excursions to the western slopes of the Cascades, where C. richarti was found. Caseya borealis was also collected near the two C. richarti localities. Further collecting may reveal that both of these species have much wider distributions in the Cascade Mountains, especially north of the Snoqualmie River.

Collection locality Latitude / Elev. Coll. Collectors

Longitude (ft. ASL) Date Clallam Co.: Deer Park Road, 6.1 mile S of US 101 N48° 1.19' 1123' 14-VI-03 WPL W123° 20.62'

Clallam Co.: Olympic National Park, 3.1 mile S of N48° 04.406' 1100' 10-XI-03 WPL Port Angeles, road to Hurricane Ridge W123° 25.951'

Clallam Co.: Olympic National Park, Heart of the N48° 02.137' 581' 10-XI-03 WPL Hills Campground W123° 25.581'

Grays Harbor Co.: 3.0 mile N SR12 on Middle Sat- N47° 01.992' 70' 26-III-04 WPL sop Rd. W123° 31.553'

Grays Harbor Co.: Canyon River, 6.0 mile W, 1.25 N47° 17.12' 500’ 17-I-03 WPL mile N of Matlock W123° 31.65'

Grays Harbor Co.: Canyon River, 6.0 mile W, 1.5 N47° 26.018' 500' 26-V-03 WPL mile N of Matlock W123° 52.041'

Grays Harbor Co.: Inner Creek at Quinault Lake N47° 30.015' 400' 13-II-05 WPL, Loop Road, W123° 46.093' C. Richart Grays Harbor Co.: Porter Creek Rd. and B-line, 3.1 N46° 58.217' 100' 24-I-05 WPL mile E of Porter, Capitol State Forest W123° 16.357'

Jefferson Co.: Alder Creek, 1.5 mile N of Hoh River, N47° 49.043' 450' 1-III-03 WPL W124° 3.030'

Dosewallups River, 7.0 mile W of US 101, Jefferson N47° 45.961' 260' 10-XI-03 WPL Co. W123° 01.213'

Jefferson Co: Falls View Campground, Olympic N47° 47.39' 450' 22-II-03 WPL National Forest, 7.8 mile N of Brinnon W122° 55.66'

Jefferson Co.: Nolan Creek at US 101 N47° 45.003' 100' 1-III-02 WPL W124° 19.019'

King Co.: Exit 38 on I-90, near Olallie State Park N47° 26.651' 1250' 23-II-04 WPL,

W121° 40.081' C. Richart Lewis Co.: 604 Roswell Road, Centralia N46° 43.339' 280' 5-I-03 C. Richart

W122° 56.664'

Mason Co.: Beerbower Rd. at Schafer State Park N47° 06.004' 50' 31-XII-04 WPL Rd., beside Schafer SP W123° 23.024'

Mason Co.: Kennedy Creek N47° 05.023' 40' 30-III-03 WPL W123° 05.045'

Mason Co.: Kennedy Creek, 0.6 mile upstream of N47° 05.428' 40' 8-II-03 WPL US 101 W123° 05.723'

to be continued.

Collection locality Latitude / Elev. Coll. Collectors

Longitude (ft. ASL) Date Mason Co.: Potlatch State Park N47° 21.043' 60' 17-II-03 WPL W123° 09.030'

Mason Co.: Mount Rose Trailhead, Olympic N47° 29.74' 805' 25-XI-03 WPL National Park W123° 16.09'

Mason Co.: Skokomish Valley Road 4.5 mile W of N47° 19.06' 15-II-03 WPL US 101 W123° 10.35'

Mason Co.: Skokomish Valley Road at US 101 N47° 19.06' 100' 15-II-03 WPL W123° 10.35'

Mason Co.: SR 119, 6.0 mile W of US 101 at Hood- N47° 26.047' 750' 17-II-03 WPL sport W123° 12.035'

Pacific Co.: 2.0 mile W of Astoria Bridge on US 101 N46° 15.415' 10' 2-I-04 WPL,

W123° 55.501' C. Richart Thurston Co.: The Evergreen State College campus, II-03 C. Richart Olympia

Thurston Co.: The Evergreen State College campus, N47° 4.09' 140' 22-III-03 WPL Olympia W122° 58.72'

Thurston Co.: The Evergreen State College, Olympia N47° 4.51' 150' 14-II-03 WPL W122° 57.65'

Thurston Co.: The Evergreen State College, Olympia N47 0 4.089 150' 16-III-03 WPL W122 58.043

Thurston Co.: The Evergreen State College, Olympia N47° 4.51' 150' 26-I-03 WPL W122° 57.65'

Thurston Co.: Hospital Creek, 5.0 mile S, 3.0 mile E N46° 46.39' 700' 12-X-03 WPL of Vail W122° 35.17'

Thurston Co.: Hospital Creek, above confluence N46° 46.396' 700' 15-XII-03 WPL, with Skookumchuck River W122° 35 133' K. McAllister Thurston Co.: McAllister Creek, S of Steilacoom N47° 03.042' 100' 11-XII-04 WPL Road W122° 42.079'

Thurston Co.: McAllister Springs N47° 02.837' 60-123' 7-II-04 WPL,

W122° 43.722' C. Richart

Thurston Co: McAllister Springs N47° 02.946' 60-123' 22-II-04 WPL W122° 43.678'

Thurston Co.: Mission Creek, Priest Point Park, N47° 4.02' 70' 17-V-03 WPL Olympia W122° 53.50'

Thurston Co.: Priest Point Park, Olympia N47° 04.057' 70' 2-II-03 WPL W122° 53.085'

to be continued.

Thurston Co.: Woodard Bay Natural Resource Con- N47° 7.82' 50' 2-III-03 WPL servation Area W122° 51.21'

Wahkiakum Co.: 11.7 mile up Elochoman Valley Rd. N46° 19.007' 450' 28-III-04 C. Richart from SR 4 W123° 15.702'

Wahkiakum Co.: Lower Hendrickson Canyon N46° 22.158' 90' 23-I-04 WPL, M. W123° 39.950' Leonard, C. Richart, B. Pyle, K. Novoselic

Figures

FIGURE 2, 3. Caseya richarti n. sp. male. 2. Left gonopod, mesal view. 3. Same, lateral view. ac, angiocoxite (blue); fc, flagellocoxite (yellow); ll, lateral lamina (violet); ml, mesal lamina (green); tla, colpocoxite lamina (red); tll, membranous lobe of colpocoxite (red).

FIGURE 4 – 8. Caseya richarti n. sp. male. 4. Gonopod complex, ventral view, posterior at top. 5. Second and third legpair, anterior view. 6. Third legpair, posterior view. 7. Seventh legpair, posterior view. 8. Tenth legpair, posterior view. ccx, angiocoxite of right gonopod (blue); cp 9, coxite of left ninth leg (green); cp 10, process from coxae of right leg 10 (orange); cx 7, coxa of right leg 7 (yellow); cx 2, coxa of right leg 2; cl 3, coxal lobe of left leg 3; ga, gonapophysis of right leg 2; t 9, teolopodite of leg 9 (red).

FIGURE 9 – 10. Caseya richarti n. sp. 9. Right leg 9 of male, anterior view. 10. Cyphopod receptacles of female, anterior view.