Tenagodus modestus, (DALL, 1881)

Bieler, Rüdiger, 2004, Sanitation with sponge and plunger: western Atlantic slit-wormsnails (Mollusca: Caenogastropoda: Siliquariidae), Zoological Journal of the Linnean Society 140 (3), pp. 307-333 : 330

TENAGODUS MODESTUS (DALL, 1881) : SELECTED

SPECIMENS EXAMINED

BERMUDA: 1 shell, Argus Bank 55 m, FMNH 13675; 2 shells, Challenger Bank, MCZ 228069. USA: FLOR- IDA (Atlantic Ocean): fragments of alcohol-preserved sponge colony with embedded and isolated specimens ( Figs 41, 42 ; Demospongiae: Choristida: Thrombidae : Thrombus sp. ); off Key Largo, Elbow Reef (25∞07.79¢N, 80∞14.32¢W), 56 m, 06-VI-1979, by R/V Johnson/ submersible Johnson-Sea-Link-I dive 688, HBOM 065: 00767 (sponge), HBOM 065: 02026 (with isolated specimens, intact protoconch), HBOM 065:T0021, T0022 (photographic documentation), DMNH A00625 , DMNH 181857, FMNH 296715, 296716 (with SEM samples), 296717 (histological slides); 1 shell, 0.5 miles off Lauderdale-by-the-Sea, 50–100 ft [15–30 m], DMNH 40578. FLORIDA (Gulf of Mexico): alcohol-preserved sample of thrombid (?) sponge with embedded siliquariids, about 48 nm NW of Dry Tortugas, Gulf of Mexico, Florida Shelf (25∞06.91¢N, 83∞37.05¢W), 43 m, bottom with gravel, sand, Halimeda algae, 16-VII-1992; R/V Johnson, 15 ft trawl, HBOM 65-002-93, FMNH 296711; 2 alcoholpreserved samples in sponge, 92 miles W of Sanibel Island Light, Lee County (26∞24¢N, 83∞43¢W), 73 m, R/ V Herman Cortez Sta. M 1965, FSBC I 957, FSBC I 1196; 1 shell, due W of Tampa, 91 m, DMNH 38096; 1 shell, off Tarpon Springs, 30 m, DMNH 84284; 1 shell, W Gulf, 60 m, DMNH 175374; 2 shells, W of Egmont Pass, 55–110 m, DMNH 105493; 3 shells from large ‘sponge mass’ collected with ‘some fifty or sixty other specimens’, 75 miles SW of Egmont Key, DMNH 105931; 2 shells, off Pensacola, 64 m, ANSP 193119. TEXAS: 8 shells, 107 miles SE of Galveston (27∞54.5¢N, 93∞35.2¢W), 18 m, MCZ 199223. BAHAMAS: 5 shells, Lucaya, Grand Bahama Island (26∞29¢45≤N, 78∞37¢15≤W) ANSP 372431, 373596, 411178; 2 shells, Tamarind, Grand Bahama Island (26∞30¢45≤N, 78∞36¢00≤W), ANSP 374748, 374585. 2 shells, off Black Rock, W side of Abaco Island, submersible Johnson- Sea-Link I, dive 1906, R/V Seward Johnson, 182 m, FMNH 296694. CUBA: several shells, off Havana, USFC R/V Albatross 1884–1885 stations 2164, 2332, 2333, 2348, 285– 386 m, USNM 94177, 193557, 193563, 225007; 7 shells, off Havana, USFC R/V Blake 1877– 78, 415 m, MCZ 7420; 1 shell, off Havana, USFC R/V Blake 1877– 78, 823 m, MCZ 7422; 3 shells, off Bahia Honda, USFC R/V Blake 1877– 78, 402 m, MCZ 7419 (paralectotypes as above); 10 shells, 4 miles from Havana, USFC R/V Blake 1877– 78, 1472 m, MCZ 7417, 7418 (the latter illustrated by Agassiz, 1888; see above). PUERTO RICO: 1 shell, Ramey Air Force Base (beach), DMNH 110235. Many shells, Johnson- Smithsonian Deep Sea Expedition, station 16, 69 m (18∞29¢40≤-31¢00≤N, 66∞08¢30≤-10¢15≤W), USNM 430166. LEEWARD ISLANDS: VIRGIN ISLANDS: Saint Croix: 1 shell, USFC R/V Blake 1879, 929 m, MCZ 7425; 3 shells, USFC R/V Blake 1879, 210 m, MCZ 7426. ANTIGUA: many shells, Smithsonian University of Iowa Expedition 1918, station 115, 219 m, USNM 500079. 4 shells, NMFS R/V Oregon, station 5070, 91– 110 m (17∞06¢30≤N, 62∞39¢W), USNM 811132. WIND- WARD ISLANDS: DOMINICA: many large shells, NMFS R/V Oregon station 5920, 30 miles NE of Roseau, 69 m (15∞37¢N, 61∞22¢W), USNM 811136; 2 shells, USFC R/V Blake station 177, 65 m, USNM 87243; 3 shells, USFC R/V Blake 1879, 216 m, MCZ 7427. MARTINIQUE: 3 shells, NMFS R/V Oregon station 5000, 73 m (14∞53¢N, 61∞06¢W), USNM 811130; 4 shells, USFC R/V Blake 1877– 78, 311 m, MCZ 7428. ST. VINCENT: 7 shells, USFC R/V Blake 1879 station 231, 105 m, USNM 87241. THE GRENADINES: USFC R/ V Blake 1879, 298 m, MCZ 7429. Grenada: 1 shell, USFC R/V Blake 1879, 402 m, MCZ 7430. BARBA- DOS: many shells, Smithsonian-University of Iowa Expedition 1918 various stations (e.g. 24, 44, 67, 78, 85), 64–183 m, USNM 500049, 500052, 500056, 500067, 500071, and others; several specimens in sponge, off Barbados, USFC R/V Blake 1879, 172 m, MCZ 7423; 1 shell, USFC R/V Blake 1879, 183 m, MCZ 7424; several specimens in sponge, off Barbados, R/V Blake 1879 station 278, 126 m, MCZ 259091; 1 shell, St. James, Holetown, 13∞10¢52≤N, 59∞38¢30≤W, ANSP 353540; 19 shells, off Speightstown, 101 m (13∞14.82¢N, 59∞39.82¢W; 17-IV-89), submersible Johnson-Sea-Link II, dive 1732, R/V Seward Johnson, FMNH 296712, HBOM 065: 0000; 2 shells, off Speightstown, 74 m (13∞14.80¢N, 59∞39.50¢W), submersible Johnson-Sea-Link II dive 1736, R/V Seward Johnson,( FMNH 296710. TRINIDAD: 12 shells, off Monos Island, 21 m, collected in Thrombus sponge, USNM 86776. VENEZUELA: 4 shells, trawled off Morrocoy, Golfo Triste, 46–55 m (10∞40-53¢N, 68∞00- 10¢W), FMNH 296714. COLOMBIA: 7 shells, NMFS R/V Oregon station 4904, 50 miles SW of Cartagena, 146–183 m (10∞00¢N, 76∞05¢W), USNM 811129. PAN- AMA: 1 shell, NMFS R/V Oregon station 5737, 15 miles E of Punta San Blas (9∞37¢N, 79∞03¢W), 66 m, USNM 811135. BRAZIL: 19 shells and fragments, Martin Vaz Islands, off SE Brazil, R/V ‘Marion-Dufresne’ (Bouchet, Leal & Metivier 05/1987) MD55 station DC55 (20∞32¢S, 28∞52¢W), 780–795 m, ex J. Leal, DMNH 184929, FMNH 29713.

Figures

Figures 41–43. Tenagodus modestus in sponge Thrombus sp. (Florida Keys, HBOM 065: 00767, 065: 02026). 41: sponge colony in 56 m depth off Key Largo; approximately 3 m in length (underwater photograph by submersible). 42: detail of Fig. 41, sponge surface with apertural openings of gastropods (alcohol-preserved). 43: side view of dissected, alcoholpreserved sponge, showing density in situ. Coin diameter = 19 mm.