Parasmittina acondylata Dick & Ngai & Doan 2020, n. sp.

Parasmittina acondylata n. sp. (Fig. 9 A–C) urn:lsid:zoobank.org:act: D3FE34D9-98B3-4883-9A6C-AC0C5B74281A Etymology. The specific name is derived from the Greek prefix a- (without) and condyle, referring to the apparent lack of condyles. Material examined. Holotype, VNMN-0236 (CT-32), on SEM stub. VNMN-0237, additional dried specimens. Measurements. AzL, 0.35–0.56 (0.430 ± 0.063); AzW, 0.19–0.32 (0.267 ± 0.037); SecOrL, 0.088 –0.143 (0.119 ± 0.013); SecOrW, 0.077 –0.117 (0.103 ± 0.009); OvL, 0.13–0.17 (0.158 ±0.014); OvW, 0.19–0.23 (0.203 ± 0.014) (n = 15, 1). AvRL, 0.07–0.13 (0.103 ± 0.024); AvRW, 0.03–0.04 (0.034 ± 0.003) (n = 12, 1). Diagnosis. Three oral spines. Orifice with lyrula moderately broad and tall, alate or non-alate; condyles lacking. Frontal shield coarsely pustulose; areolae conspicuous, circular. Single, rather small frontal avicularium per zooid, proximolateral to orifice (occasionally medial), abutting peristomial collar, directed proximally, rostrum elongate, narrow, rounded at both ends; no giant avicularia observed. Ooecium broader than long, smooth, with around 20 scattered pseudopores; peristomial rim continuous around proximal ooecial margin. Description. Colony encrusting, unilaminar, sheet-like. Zooids irregular; rectangular, barrel-shaped, or spindle-shaped; distinct, delineated by groove and marginal line flanked by opposing columns of areolae. Frontal wall highly convex, rising to raised peristomial collar surrounding orifice laterally and proximally; coarsely pustulose, with six to nine conspicuous areolae along each lateral margin, with short struts between adjacent areolae. Primary orifice submerged, appearing longer than broad, with median lyrula about one-third as wide as orifice; lyrula moderately long, tapering, weakly alate or truncate. Condyles appear lacking, or scarcely evident, possibly represented by slight, broad convexity on either side distolateral to lyrula. Secondary orifice pear-shaped in outline, with proximal median constriction forming weak or pronounced ...