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Marine Science UH Hilo

Dr. D's Guide to un-Hoover-able and Hoover-able Invertebrates little stuff to worms. Marine Science UH Hilo. Contributors:. Marta deMaintenon (compiler) Matt Barton Nancy Chaney John Coney Jon Bjornen. Micro!. Crawling sand grains you say…. Foraminifera!

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Marine Science UH Hilo

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  1. Dr. D's Guide to un-Hoover-able and Hoover-able Invertebrates little stuff to worms Marine Science UH Hilo

  2. Contributors: Marta deMaintenon (compiler) Matt Barton Nancy Chaney John Coney Jon Bjornen

  3. Micro! Crawling sand grains you say… Foraminifera! These benthic forams are about 1-2 mm in diameter

  4. Staurocladia sp. This is a minute creeping medusa with no oral tentacles. It does have a polyp stage. The central disc is 0.5 mm diameter. The lumps along the tentacles are clusters of nematocysts. CNIDARIA HYDROZOA- HYDROIDA ELEUTHERIIDAE

  5. Convoluta sp. This small worm was about 1 mm long, but they get larger. The color pattern seen here and the triple points on the tail are typical; its green coloration may be due to symbionts but this is unknown. ACOELOMORPHA

  6. Acoel flatworm This small worm was about 4 mm long. They are fast but essentially featureless; this one has been contained in a water drop to be photographed. The round end is the front. ACOELOMORPHA

  7. Unknown roundworm This small worm was about 8 mm long. NEMATODA

  8. Paraplanocera oligoglena (Schmarda, 1859) Size to 70 mm; nocturnal. These are more circular than bilateral, with a pair of nuchal tentacles in the middle of the dorsal surface and eyespots in clusters at the tentacle bases. The yellow areas are the uterus. Eats micromolluscs. Polycladida - Acotylea Planoceridae Platyhelminthes

  9. Pseudoceros ferrugineus Hyman, 1959 – Fuschia flatworm. size to 50 mm; nocturnal. Note the clusters of eyespots on and centrally behind the pseudotentacles. This one is about 20 mm long. Polycladida - Cotylea Pseudocerotidae Platyhelminthes

  10. Pseudoceros paralaticlavus Newman & Cannon, 1994 – Gold rim flatworm. May be just a color form of P. jebborum. size to 40 mm; nocturnal. Note the clusters of eyespots around the margin and centrally behind the pseudotentacles. This one is about 15 mm long. Polycladida - Cotylea Pseudocerotidae Platyhelminthes

  11. Pseudoceros c.f. dimidiatus von Graff, 1893 – Divided flatworm. Size to 65 mm; day active. These are toxic, and have been found to contain tetrodotoxin. Photo by John Coney Polycladida - Cotylea Pseudocerotidae Platyhelminthes

  12. Pseudobiceros hymanae Newman & Cannon, 1997 – Hyman’s flatworm. Size to 75 mm; nocturnal. Photo by John Coney Polycladida - Cotylea Pseudocerotidae Platyhelminthes

  13. Unknown annelid? This small worm was about 6 mm long; it might be a nematode. ANNELIDA

  14. Eurythoe complanata (Pallas, 1766) – Green fire worm size to 24 cm; Hoover doesn’t do these much justice. You can identify this species by the iridescent grey to greenish or pink color and shape of the caruncle. They are very common under rocks. caruncle Polychaeta Amphinomidae Annelida

  15. Pherecardia striata (Kinberg, 1857) – Lined fire worm size to 20 cm; This is the more active and aggressively voracious of the large local fire worms. The body is lined and the head has a large fuzzy caruncle. Photo by John Coney Polychaeta Amphinomidae Annelida

  16. Syllidsp. This small polychaete, about 1.5 cm long, was found in algae. Syllids usually have long articulated tentacles and cirri and two pairs of eyes. They’re very common and diverse but not large. Polychaeta Syllidae Annelida

  17. Spionidsp. This small polychaete is about 7 mm long. Spionids are diverse, with varying habits and typically have a set of very long, grooved palps on the head. Polychaeta Spionidae? Annelida

  18. Iphione muricata (Savigny, 1818) The spiny scale worm is typically tan or orange and up to about 50 mm long. The back is covered with 13 pairs of overlapping scales. The front can be recognized by the longer tentacles. Found subtidally, under rocks Upper Photo by J. Coney Polychaeta Polynoidae Annelida

  19. Chaetopteridsp. This small tube worm (body about 5 mm long) was found by shaking rubble. It is sedentary and builds tubes of sand and mucus (which this one was unhappily picked out of). They have a pair of long tentacle-like palps and 3 distinct body regions. Polychaeta Chaetopteridae Annelida

  20. Sabellastarte spectabilis (Grube, 1878) This large species uses its fan for feeding and respiration. The worm is up to 8 cm in length, and is found in shallow water to ~30m Photo by J. Coney Polychaeta Sabellidae Annelida

  21. Spirobranchus giganteus (Grube, 1862) Despite it’s name, the visible feeding structures in this species are small, only a couple cm long; the entire animal is about 4 cm long. They vary in color and each has 2 spiral fans. Photos by J. Coney Polychaeta Serpulidae Annelida

  22. Loimia medusa (Savigny, 1818) A crown of long bluish-white feeding tentacles are all that is typically seen of this species, though the worm itself can be up to 30cm long. Lanice conchilega is indistinguishable, but less common. Photo by J. Coney Polychaeta Terebellidae Annelida

  23. Echiuridsp. Echiurids are strange infaunal worms with highly elastic non-retractable probosces used in feeding. This one is about 5 cm long. Although annelids are segmented, the segmentation is lost; so body shape is up to the worm. Echiuridae Annelida

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