Crisia recurva Heller, 1867: 118

HAYWARD, PETER J. & McKINNEY, FRANK K., 2002, Northern Adriatic Bryozoa From The Vicinity Of Rovinj, Croatia, Bulletin of the American Museum of Natural History 2002 (270), pp. 1-139 : 122-123

Crisia recurva Heller, 1867: 118 .

LECTOTYPE (chosen here): UIIZ 315.

DESCRIPTION (AMNH 1041, 1042): Small bushy colonies of biserial, articulated, flat branches, white, less than 1 cm high. Colonies generally highly branched, with branch internodes commonly giving rise to one or more lateral branches and, in some, a distally formed internode. Internodes flat, short, straight to gently curved, usually of 15 to 20 autozooids, except smaller number associat­ ed with attachment zooids in basal segments. Lateral branches almost always arising at third zooid or higher, with second lateral branch if present originating about 3 zooids farther along. Circular autozooidal orifices alternating from side­to­side of branches, at end of long strongly frontally curved peristome.

Gonozooids large, with conspicuously inflated brood chambers. Brood chambers typically with a short, broad, median keel along distal frontal surface and circular ooeciopore at end of frontally directed, slightly flared ooeciostome approximately centered at distal end of brood chamber. Each gonozooid generally near middle of fertile internode, at a point at which a lateral branch is formed. Fertile colonies collected in June, July, and November.

REMARKS: Heller’s specimen chosen as lectotype is illustrated here as fig. 59I. This species has not been recorded since being named by Heller from sparse material found at Lesina, Croatia. The species is distinctive, easily recognized by the tiny branches, small zooids, strongly curved peristomes, and abundant and uniquely shaped brood chambers. Colonies of C. recurva commonly are attached to basal segments of Cellaria within the meadow west of Banjole ( McKinney and Jaklin, 2000), the only locality in which we have found them.

DISTRIBUTION: Known only from the northeastern Adriatic Sea.

MEASUREMENTS (SKELETAL): AD 57 ± 7 µm, 45–70 (3, 39), AS 303 ± 44, 230–400 (3, 34), ASW 257 ± 31m 200–312 (3, 31), BrD 151 ± 21, 120–187 (3, 17), GL 351 ± 24, 310–380 (3, 15), GW 292 ± 39, 220– 360 (3, 15), OsD 68 ± 14, 40–80 (3, 13).

SUBORDER RECTANGULATA WATERS, 1887 FAMILY LICHENOPORIDAE SMITT, 1866 (1867) GENUS DISPORELLA GRAY, 1848

Disporella hispida ( Fleming, 1828)

Figures 60A–J , 61 , 62A, B

Discopora hispid a Fleming, 1828: 530. Tubulipora hispida: Johnston, 1847: 268 . Discoporella hispida: Busk, 1875: 30 .

Figures

Fig. 60. A–J. Disporella hispida. A–D. Yellow variety. A. General aspect (AMNH 1043; 0.5 mm). B. Autozooids (orifices at top) largely buried below alveoli (AMNH 1044; 0.2 mm). C. Spines within autozooid closed by inset diaphragm (AMNH 1043; 0.02 mm). D. Growing edge of colony, with minimal orificial spines (AMNH 1043; 0.1 mm). E–J. white variety. E. Colony with incompletely formed central brood chamber (AMNH 1046; 0.5 mm). F. Spinose orifice of autozooid, and alveoli (AMNH 1046; 0.1 mm). G. Spines within autozooid (AMNH 1047; 0.01 mm). H. Growing edge of colony with spinose autozooidal orifices (AMNH 1048; 0.1 mm). I. Fertile colony with completely formed brood chamber and ooeciostome (AMNH 1047; 0.5 mm). J. Ooeciostome (AMNH 1047; 0.05 mm).

Fig. 61. Disporella hispida. A, B. Yellow colonies with 9 tentacles. A. Ontogenetic increase in tentacle and exposed introvert length: Filled circles plot maximum tentacle length within lophophores (Y = 106.231 + 0.250X), open circles plot minimum tentacle lengths (Y = 106.340 + 0.159X), and diamonds plot exposed introvert length (Y = ‾27.526 + 0.090X). B. Ontogenetic increase in lophophore diameter (Y = 189.359 + 0.110X). C, D. White colonies with 10 tentacles. C. Ontogenetic increase in tentacle and exposed introvert length: Filled circles plot maximum tentacle length within lophophores (Y = 156.909 + 0.514X), open circles plot minimum tentacle lengths (Y = 172.051 + 0.226X), and diamonds plot exposed introvert length (Y = ‾35.225 + 0.166X). D. Ontogenetic increase in lophophore diameter (Y = 192.398 + 0.330X).

Fig. 62. A, B. Disporella hispida, yellow variety. A. Ancestrula and early autozooids (AMNH 1048; 0.1 mm). B. Young colony (AMNH 1049; 0.5 mm). C–I. Patinella radiata. C. Fertile colony (AMNH 1050; 0.5 mm). D. Short ooeciostome with circular ooeciopore (AMNH 1050; 0.1 mm). E. Radiating fascicles of autozooids separated by alveoli, and growing edge of colony (AMNH 1051; 0.1 mm). F. Stellate­headed spines within autozooids (AMNH 1051; 0.02 mm). G. Broken ancestrula (AMNH 1052; 0.1 mm). H. Ancestrula and first autozooids of young colony (specimen destroyed; 0.05 mm). I. Ancestrula and first zooids of young colony in early stages of reflection of basal lamina back over ancestrula, establishing radial growth (AMNH 1048; 0.2 mm).