110 



P.BRONNIMANN AND J.E. WHITTAKER 



Bronnimann & Zaninetti (1984b: 222, Addendum) have 

 shown that Haplophragmium agglutinans d'Orbigny var. trip- 

 erforata Millett (1899) is identical with H.salsum Cushman & 

 Bronnimann (1948a), which is the type species of Acupeina 

 Bronnimann & Zaninetti, 19846. 



Lectotype. The individual illustrated by Millett (1899, pi. 5, 

 figs 2a, b; Figs 1.2, 13-15 herein) is designated lectotype of//. 

 agglutinans var. triperforata , now Acupeina triperforata. It is 

 deposited in the collections of the BMNH, no. 

 1955.11.1.1076. 



Dimensions (lectotype). Height of test — 380 um; diam- 

 eter of coiled portion — 235 urn; maximum diameters of 

 apertural pores — 25 um, with everted rims 4 urn high. 



Environment. This species ... 'is not uncommon at Station 

 9, and occurs also, but very sparingly, at Station 5' of Area 1. 

 At Station 9, Millett (1899: 359) also reported Haplophrag- 

 mium cassis (Parker) (= Ammoastuta salsa Cushman & 

 Bronnimann and Ammotium spp.), all brackish water spe- 

 cies. Both Acuipeina triperforata and Arenoparella mexicana 

 are also exclusively brackish forms, occurring commonly in 

 tropical to subtropical mangrove swamp sediments. 



Genus AMMOSASTUTA Loeblich & Tappan, 1984 



Type species. Ammoastuta salsa Cushman & Bronnimann, 

 1948a. 



Ammoastuta salsa Cushman & Bronnimann, 194&V* 



Figs 1.6,35 



1899 



1948a 



1970 

 1986 



Haplophragmium cassis (Parker); Millett (pars): 359; 

 pi. 5, figs 6a, b only (non figs 4,5,7) (non Lituola 

 cassis Parker, 1870). 



Ammoastuta salsa Cushman & Bronnimann: 17; pi. 

 3, figs 14-16. 



Ammoastuta salsa Cushman (sic); Hofker: 3. 

 Ammoastuta salsa Cushman & Bronnimann; Bronni- 

 mann: 29-AA; figs 1-7. (a. v. for synonymy). 



Remarks. Millett (1899: 359, pi. 5, figs 6a,b; here repro- 

 duced as Fig. 1.6a,b) figured side and edge views of a slightly 

 damaged, but clearly recognizable specimen of Ammoastuta 

 salsa under the name of Haplophragmium cassis (Parker). He 

 also illustrated two different species of Ammotium (pi. 5, figs 

 4a,b, 5a, b; Figs 1.4, 5) and, used for all these different 

 morphologies the same name, as he thought . . . 'the Malay 

 specimens of this species [//. cassis] are very variable in form, 

 some of them being extremely compressed, and composed of 

 numerous chambers'. 



The SEM photograph of the side view (Fig. 35), although 

 now slightly more damaged, is demonstrably of the same 

 specimen as in Millett's drawing. The tight initial coil cannot 

 be seen, but on the other hand, the final two chambers of the 



juvenile stage are clearly visible. The adult consists of at least 

 7 elongate uniserial chambers which make up the main 

 portion of the compressed test. 



Bronnimann's (1986) morphological revision of A. salsa 

 has shown that the test starts with a tight early spiral 

 consisting only of a proloculus and deuteroloculus. On the 

 basis of this arrangement, Ammosastuta is correctly placed in 

 the Lituolidae. Loeblich & Tappan (1987: 79) accepted this 

 interpretation, but stated that the second chamber is growing 

 in the . . . 'opposite direction' (without saying in respect to 

 what). This is simply not the case. The second chamber 

 develops from a porus in the side of the proloculus. It is just 

 the normal forward continuation, considering the flow of the 

 protoplasm, which produces the elongate deuteroloculus with 

 a porus at its apex. Hence the embryonic chambers form a 

 tight, reduced spiral (see Bronnimann, 1986: 32, fig. 3). 



Ammoastuta salsa is occasionally placed in synonymy with 

 Ammobaculites (=Ammoastuta) ineptus Cushman & McCul- 

 loch, 1939. Cushman & Bronnimann (1948a) regarded the 

 two as distinct, as did Bronnimann (1986). An examination 

 by Bronnimann of the two paratypes of A. ineptus, deposited 

 in the collections of the U.S. National Museum of Natural 

 History, Washington, confirms this separation. Of the 

 paratypes, only one, registration no. 35826, is well preserved. 

 It is definitely an Ammoastuta, but differs from the com- 

 pressed A. salsa by having a strongly inflated test. 



Dimensions of figured specimen (BMNH no. 

 1955.11.1.1121). Maximum height (damaged) — 280 um. 



Environment. Recorded from Station 9, Area 1. It occurs 

 together with Acupeina triperforata, Ammotium spp. and 

 Arenoparella mexicana, all typical brackish water species. 



Genus AMMOBACULITES Cushman, 1910 



Type species. Spirolina agglutinans d'Orbigny, 1846. Lecto- 

 type designated by Loeblich & Tappan (1964: C241, figs 

 251.6a,b). 



Remarks. The genus Ammobaculites Cushman (1910) con- 

 tains free agglutinated tests with a simple interior; the early 

 portion is planispiral, the later part uncoiled and rectilinear. 

 It is radially-symmetrical in transverse section. The single 

 aperture is terminal, areal and radially symmetrical. The wall 

 structure of the type species is unknown. 



This definition is more restrictive than Loeblich & Tap- 

 pan's (1987: 74) as it not only excludes streptospiral and 

 trochospiral initial coils, but also laterally compressed tests. 

 The transverse sections of the chambers of the uncoiled 

 portion of the test and the outlines of the terminal apertures 

 are radially symmetrical; these features are regarded as 

 important generic criteria. 



The wall structure of Ammobaculites exiguus, the species in 

 the Millett Collection, is of the Trochamminina type. If A. 



Figs 3-8 Trunculocavus durrandi gen. et sp.nov. Figs 3,4, Detail of aperture (X900) and side view (X160), respectively. Holotype, BMNH 



no. 1955.11.1.187; Fig. 5, Side view (X175). Paratype, BMNH no. 1911.11.1.189; Figs 6-8, Detail of initial coil (X540), aperture (X730) 



and side view (X160), respectively. Paratype, BMNH no. 1955.11.1.188. 

 Figs 9-12 Arenoparrella mexicana (Kornfeld). Detail of apertures (X480), side, edge and view of other side (X160), respectively. BMNH 



no. 1955.11.1.1075. 

 Figs 13-15 Acupeina triperforata (Millett). Edge and side view (X160) and detail of aperture (X700), respectively. BMNH no. 



1911.1. .1.1076. 

 All from the Millett Collection, Malay Archipelago. 



