Topic
Stiliger
About: Stiliger is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 42 citations.
Papers
Journal Article•
TL;DR: A natural history review of the regional sacoglossan fauna synthesizes the scattered literature about the stenophagous gastropods and highlights the major gaps that malacologists should seek to fill in the study of this highly specialized order.
Abstract: The species richness and geographic ranges of the sacoglossan (synonym: ascoglossan) opisthobranch fauna have been well characterized for northeastern Pacific shores, particularly in the Californian province, but the natural history and ecology of these gastropods have been comparatively less well studied. Over half of the described sacoglossan genera and approximately two-thirds of the families are represented on northeastern Pacific shores. At least 25 species of sacoglossans occur: eighteen species are known stenophagous herbivores, and one feeds on opisthobranch eggs. Eight species occur on cold-temperate northeastern Pacific shores, 19 species inhabit the Gulf of California and warm-temperate to tropical Pacific shores, and four species occur in the Aleutian, Oregonian, Californian, and Panamic provinces. Five of the species have been studied appreciably more than the others: Elysia hedgpethi (Marcus, 1961), Alderia modesta (Loven, 1844), Placida dendritica (Alder & Hancock, 1843), Aplysiopsis enteromorphae (Cockerell & Eliot, 1905), and Stiliger fuscovittatus Lance, 1962. The paucity of study on other species is not necessarily due to low abundance. This natural history review of the regional sacoglossan fauna synthesizes the scattered literature about the stenophagous gastropods and highlights the major gaps that malacologists should seek to fill in the study of this highly specialized order. Future research should focus more on the autecology, population ecology, and community ecology of sacoglossans. Recent advances in isotope analysis, fluorometry, larval culturing, and molecular techniques provide challenging opportunities to enhance our understanding of sacoglossan biology.
21 citations
TL;DR: Development type for 33 species of benthic opisthobranch gastropod gastropods collected mainly from the Southern California Bight is document, highlighting the predominance of planktotrophic development in benthics opistHobranchs from the northeast Pacific Ocean.
Abstract: We document development type for 33 species of benthic opisthobranch gastropods – 15 for the first time – collected mainly from the Southern California Bight. Fourteen of the newly examined species had planktotrophic development, while the dorid nudibranch Atagema alba had capsular metamorphic development, the first example of direct development in a non-dendrodoridid nudibranch known from the northeast Pacific Ocean. For the remaining 18 species our new data are either consistent with earlier determinations of development type, or confirm previous inferences. The new data also broaden geographic coverage for some species, and for the sacoglossan Stiliger fuscovittatus and the nudibranch Melibe leonina, suggest that egg size is inversely related to temperature. We correct the previous erroneous identification of nephrocysts as eyespots in the hatching planktotrophic larvae of the nudibranchs Tritonia festiva and Janolus fuscus. These results further highlight the predominance of planktotrophic de...
11 citations
1 Jan 1963
TL;DR: The species under the genus Stiliger Ehrenberg 1831 known hitherto from the coastal waters or backwaters and estuaries of India are very few and S. nigrovittatus described here is one of the few species collected by the present writers from the Palk Bay and the Gulf of Mannar in the vicinity of Mandapam.
Abstract: The species under the genus Stiliger Ehrenberg 1831 known hitherto from the coastal
waters or backwaters and estuaries of India are very few. S. pica Annandale and
Prashad (Sewell & Annandale, 1922) from Chilka Lake and S. gopalai Rao (1937)
from Madras backwaters are the only species on record. Stiliger viridis (Kelaart)
as described by Eliot (1906a) from the Ceylon coast of Gulf of Mannar and S. tentaculatus
Eliot (1916) from Siam are two other species known from regions very close
to Indian coasts. S. nigrovittatus described here is one of the few species collected
by the present writers from the Palk Bay and the Gulf of Mannar in the vicinity of
Mandapam. It has been experienced that a careful search among the members of
filamentous algae like Chaetamorpha revealed one or the other species of the sacoglossan
Opisthobranchs which feed on those algae. A few individuals of S. nigrovittatus
were obtained from the Gulf of Mannar close to the Central Marine Fisheries
Research Institute, Mandapam Camp, on November 29, 1962, for the first time.
Subsequently they were collected from the same locality and also from Kundagal
Point near Pamban in all months upto March 1963. They were observed on algal
growths of Cladophoropsis zoolingeri (Kuetz.) Boergs., covering the rocks in the intertidal
region. In captivity they were found feeding on this alga as also on
Chaetomorpha sp.
3 citations
TL;DR: Using flow cytometric analysis, haploid genome size of the Stiliger felinus species was found to be 2.8 pg: the highest value encountered in the subclass Opisthobranchia.
Abstract: A karyological investigation was carried out on the testis cells of the tidal pool sacoglossan sea slug Stiliger felinus from New Zealand. The haploid chromosome set was characterised by 14 elements where median‐, subterminal‐, and terminal‐centromere chromosomes were present. Using flow cytometric analysis, haploid genome size of the species was found to be 2.8 pg: the highest value encountered in the subclass Opisthobranchia. Stiliger felinus differs from other Stiligeridae in chromosome number and frequency of cross‐shaped bivalents in spermatocytal metaphase I plates.
1 citations
Journal Article•
TL;DR: It is predicted that these sacoglossans and their ecological analogs on other shores may have an unexpectedly important role in consuming and/or fragmenting ceramialean red algae.
Abstract: At least 20 species of sacoglossan opisthobranchs worldwide feed on delicately branching red algae; these species include members of three genera (Hermaea Loven, 1844; Stiliger Ehrenbergh, 1831; and Elysia Risso, 1818) in three sacoglossan families. The algal hosts include members of three algal families and at least ten algal genera in the order Ceramiales. We studied two sacoglossan species that feed on filamentous red algae: (1) the temperate to boreal Stiliger berghi Baba, 1937, on wave-sheltered shores of Honshu and Hokkaido, Japan, and (2) the subtropical to tropical Elysia sp. on moderately wave-exposed shores of Okinawajima and Honshu, Japan. Preference experiments demonstrated that S. berghi prefers to associate with the alga Dasya when given pairwise algal choices but readily consumes members of several algal genera and exhibits no preferences between algal lifehistory phases (diploid tetrasporophytes vs. haploid female gametophytes). Elysia sp. is a small sacoglossan that consumes uniseriate and polysiphonous red algae. Given the small size and seasonally abundant populations of organisms that feed on red algae, we predict that these sacoglossans and their ecological analogs on other shores may have an unexpectedly important role in consuming and/or fragmenting ceramialean red algae. Given the known propensity of these algae to be dispersed by international shipping and oyster mariculture, careful malacological consideration should be given to the potential of sacoglossans to be inadvertent ‘‘hitchhikers’’ on a global scale.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2013 | 1 |
| 2010 | 1 |
| 2002 | 1 |
| 1996 | 1 |
| 1963 | 1 |