Ammatophoroides angeloi, Martino & Rosso & Taylor & Chiu & Fujita & Kitamura & Yasuhara, 2025

Ammatophoroides angeloi gen. et sp. nov. Di Martino, Rosso, and Taylor

Figure 5 View FIGURE 5

zoobank.org/ 6597F524-5F13-4A81-A2EB-D25E8C08BB01

Type material. Holotype PMC. B44. 29.7.2024 a, sample 19027 ( Figure 5A–B View FIGURE 5 ); paratype PMC. B44. 29.7.2024 b1, sample 19016 ( Figure 5C–D View FIGURE 5 ); paratype PMC. B44. 29.7.2024 b2, sample 19002 ( Figure 5E–F View FIGURE 5 ); paratype PMC. B44. 29.7.2024 b3,

sample 19018 ( Figure 5G View FIGURE 5 ); Core 19, Daidokutsu cave, Okinawa, Japan, Holocene.

Etymology. Named after a close friend of the first author, Angelo Cavallaro, geologist and natural science teacher with a deep passion for rocks and fossils.

Diagnosis. As for Ammatophoroides gen. nov.

Description. Colony encrusting, multiserial, unilaminar; zooidal communications through numerous uniporous septula along lateral, vertical walls, with pore diameters ranging from 9 to 26 µm. Gymnocyst smooth, generally flat and more extensive proximally, slightly convex and narrower laterally, sometimes nodular but never developing into nodular kenozooids, sloping towards the oval to ovoidal cryptocystal rim outlining autozooids, longer than wide (mean ZL/ZW 1.38). Cryptocyst forming a raised, beaded rim, 8–19 µm wide, developing into an extensive proximal shelf occupying one-third to half of the frontal wall, slightly depressed, narrower laterally, gradually sloping towards the opesia, tapering distally and completely disappearing in ovicellate zooids, finely and evenly granular with granules arranged in radial rows becoming almost horizontal and parallel along the lateral margins. Opesia rounded trapezoidal to bell-shaped, occupying two-thirds to half of the frontal surface (mean OpL/ZL 0.51); elliptical muscle scars visible through the opesia in its distal part. Ovicell subimmersed; ooecium cap-like, smooth, imperforate, with lateral and median sutures sometimes visible, and proximolateral corners projecting into the opesia, forming a slight constriction. Spines and avicularia absent. Signs of repair visible in the cryptocyst of some zooids.

Measurements (µm). ZL 690±75, 570–903 (4, 20); ZW 501±64, 360–649 (4, 20); OpL 352±25, 305– 391 (4, 20); OpW 274±19, 233–311 (4, 20); CryL 185±30, 121–237 (4, 20); GymL 119±50, 46–243 (4, 20); OvL 111±11, 98–121 (3, 4); OvW 383±24, 354–410 (3, 4).

Remarks. This species is one of the commonest in samples from Daidokutsu cave.