Family EXCENTROCONCHIDAE Hollande & Enjumet, 1960 sensu Dumitrica (2014a) Excentroconchidae Hollande & Enjumet, 1960: 68, 86. — Dumitrica 1979: 18; 1984: 94; 2001: 193-194 ( sensu emend.); 2014a: 59-60 [in Entactinaria]. — Petrushevskaya 1979: 105. — Kozur & Mostler 1979: 33. — Anderson 1983: 50. — Cachon & Cachon 1985: 288 [in the Order Periaxoplastida]. TYPE GENUS. — Excentroconcha Mast, 1910: 64 [type species by subsequent designation (Campbell 1954: D67): Excentroconcha minor Mast, 1910: 64]. INCLUDED GENERA. — Excentroconcha Mast, 1910: 64. — Gonosphaera JØrgensen, 1905: 132. — Lonchosphaera Popofsky, 1908: 217 (= Arachnostylus synonymized by Dumitrica 1984: 94). DIAGNOSIS. — The central structure consists of an MB, two A-rays, four B-rays (rarely two), one to three AA-rays, and a central frame. The MB is also a part of the central frame. A-rays, B-rays and AArays are oriented towards upper, lateral (equatorial) and lower directions, respectively, from the central frame. A-rays emerge from both ends of MB. Four B-rays extend laterally from each corner of the central frame at the equatorial plane. The central frame is vertically subdivided into upper and lower hemispheres by the height level of the central frame where B-rays are joined. The upper hemisphere of the central frame is constructed by the MB and four to three downward rays. The lower hemisphere is variable but two sets of the four downward rays are joined near the opposite side of MB, respectively. The junction point is visible from a view parallel to MB. These two joint points are connected by a small arch at the antapical end of the central frame (named the antapical arch). The plane of the antapical arch is perpendicularly oriented to the length of MB. One to three AA-rays extend from the end of the antapical arch towards the opposite direction of the double A-rays. Some members develop an additional equatorial ring that is also connected by four B-rays and, or, other arches in the lower hemisphere of the central frame. One ...