Condyloderes multispinosus (McIntyre 1962) Higgins 1969

Condyloderes multispinosus (McIntyre, 1962)

Centroderes multispinosus McIntyre, 1962.

DIAGNOSIS.—Condyloderes with three nearly equal knobby projections along anterior margin of midventral placid, three larger projections near posterior margin, one projection near anterior margin and slightly larger projection near posterior margin of remaining placids; middorsal and lateral spines pilose; lateral accessory appendages short, ovoid, on segments

4, 7, 10 and 11; intersegmental protuberances of seventh ventral plates missing.

HOLOTYPE.—Adult of undetermined sex, TL ca. 350μ; Loch Nevis (West Coast), Scotland; 101 m; 1962?; British Museum (Natural History) 1962/82.

TOPOTYPES.—1 juvenile, TL 272μ, Higgins K80.1; 1 adult of undertermined sex, TL 336μ, Higgins K80.2; 1 female, TL 352μ, Higgins K81.1; 1 female, TL 370μ, (K81.2); USNM 37459; material provided by McIntyre without data.

REDESCRIPTION.—Topotypic adults, TL 336μ–370μ; MSW–9 88μ–90μ; SW 65μ–80μ; SW/TL 0.18–0.22.

First segment (Figure 9) with 9 thin, unsegmented oral styles, ca. 30μ surrounding mouth cone; 6 rows of scalids, first row with 10 uniformly thick, blunt scalids, ca. 70μ, generally with 9 setae, 10μ–20μ, near origin, 2 smaller setae at joint; second row with 10 tapering, pointed scalids, ca. 50μ; third row with 20 tapering, pointed scalids, ca. 40μ; fourth row with 10 slightly more robust, tapering, pointed scalids, ca. 35μ; fifth row with 28 filiform scalids, ca. 30μ, one pair centered over each of the 14 trichoscalids of row 6; trichoscalids, heavily setate, ca. 25μ, centered above placids (segment 2) except for placids adjacent to midventral placid.

Second segment (neck) with 16 nearly truncate placids, poorly cuticularized; midventral placid distinctly larger than others, three knobby projections along anterior margin (Figure 9), three similar but slightly larger projections near middle; remaining placids with single projection in both positions, placids adjacent to midventral placid slightly narrower than others.

Third segment (first trunk segment) slightly vaulted dorsally, especially noticeable along median one-fourth of segment; posterior border of segment with distinctive pectinate fringe (Figures 3–4), basal half lanceolate in longitudinal section, appearing as a series of lammelate units, becoming aristate at apex to form border of setae; short, weakly developed hairs on dorsal and ventral surface, small, dense patch of very short hairs midventrally, pattern as illustrated (Figures 1–4); distinctive pores on either side of ventral midline, similar to base of adhesive tubes of male homalorhagids but no tubular extensions apparent; patch of closely set hairs at base of each lateral and middorsal spine, spines pilose, lateral spine 28μ–34μ, middorsal spine 24μ–30μ.

Fourth segment with two ventral plates; without lateroventral pores; spinoid intersegmental protuberances on subdorsal posterior border, a second blunt-tubicolous protuberance more laterally and a third protuberance centered at posterior border of each ventral plate; lateral spine 30μ–34μ; lateral accessory appendage 15μ–16μ, slightly dorsal to lateral spine, originating from intersegmental zone of tergal plate near the lateroventral articulation zone, increasingly ovoid from point of origin, flat in cross-section, abruptly tapering, becoming filiform distal one-third

to one-half the length; middorsal spine 28μ–34μ; segment with minute hairs, pattern as illustrated; pectinate fringe as in segment 3.

Segments 5, 6, 8, and 9 similar to fourth but without lateral accessory appendage; subdorsal intersegmental protuberance more bluntly tubicolous; L–5 34μ40μ, L–6 35μ–40μ, L–8 38μ–42μ, L–9 40μ–46μ; D–5 28μ–42μ, D–6 30μ34μ, D–8 40μ–52μ, D–9 50μ–54μ.

Segments 7, 10, and 11 similar to preceding segments but with lateral accessory appendages; LA–7

2μ–22μ, LA–10 26μ–28μ, LA–11 16μ–20μ; L–7 36μ–42μ, L–10 42μ–50μ, L–11 50μ–58μ; D–7 38μ–50μ, D–10 52μ–53μ, D–11 52μ–60μ; ventral intersegmental protuberance missing in segment 7.

Segment 12 (Figures 7, 8) without intersegmental protuberances; lateral spine thin, 40μ–42μ, slightly pilose, dorsally displaced from lateral margin; middorsal spine 40μ; without lateral accessory appendage.

Segment 13 (terminal segment) without hairs, middorsal, or lateroterminal accessory spines; lateroterminal spine prominent, 210μ–222μ, one-fourth to one-third the trunk length, slightly pilose at base.

See Table 1 for measurements and indices for specimens of Condyloderes multispinosus.