@article {492,
	title = {Reproductive biology and development of Themiste lageniformis, a parthenogenic sipunculan},
	journal = {Bulletin of Marine Science},
	volume = {41},
	number = {1},
	year = {1987},
	note = {@ POPS OF T.L. HAVE TEMPORALLY STABLE BIASED SEX RATIOS WITH FEMALE OUTNUMBERING MALES 24 TO 1. MEASUREMENTS OF COELOMIC OOCYTES \& RECORDS OF SPAWNS DEFINE AN ANNUAL REPRO CYCLE. OOCYTES BEGIN IN EARLY SPRING \& REACH MAX SIZE BY JULY. SPAWNING FROM JULY-JAN BUT PEAKS IN AUGUST/SEPT. T.L. UNIQUE IN SIPS IN THAT FEMALES PRODUCE EGGS THAT SPONTANEOUSLY ACTIVATE \& DEVELOP INTO NORMAL LARVAE. MULTIPLE HYPOTHESES ARE CONSIDERED AS EXPLANATIONS OF THIS PHENOM. BUT ONLY FACULTATIVE PARTHENOGENESIS IS SUPPORTED. T.L. IS ONLY SIP REPORTED TO USE THIS REPRO MODE. **TEXT CITES REF TO OTHER STUDIES OF SPAWNING PERIODICITY - MAY WANT TO LIFT.},
	pages = {59-67},
	keywords = {parthenogenesis, repro. cycles, th. lageniformis},
	author = {Pilger, J. F.}
}
@article {493,
	title = {Ultrastructural evidence for the contractile vessel of sipunculans as a possible ultrafiltration site},
	journal = {American Zoologist},
	volume = {27},
	year = {1987},
	note = {@ CONT. VESS. IS POST. EXTENSION OF TENTACULAR CANALS INTO THE TRUNK COELOM. THIS SYSTEM CONTAINS HEMOCYTES \& CONSIDERED TO BE A VASCULAR SYSTEM ANALOGUE. THE CV WALL HAS COELOMIC EPITHEL ON EACH SIDE WITH AN ECM BETWEEN. CIRC. \& LONGI MUSC. ARE SCATTERED WITHIN THE ECM. THE CV EPITHEL FACING THE TRUNK COELOM IS COMPOSED OF PODOCYTES. THE FUNCTIONAL ROLE OF THIS ARRANGEMENT MAY BE AS A FILTRATION SURFACE IN THE FORMATION OF A PRIMARY ULTRAFILTRATE. INCREASED HYDROSTATIC PRESSURE IN THE CV AS THE TENTS \& HEAD ARE RETRACTED COULD DRIVE FLUIDS THRU THE CV WALL TO THE TRUNK COEL. MODIFICATION TO SECONDARY FILTRATE COULD OCCUR IN THE METANEPH. THE ULTRASTRUCTURAL OBSERVATIONS SUPPORT THE HYPOTHESIS OF RUPPERT \& SMITH, *ABST. OF TALK ONLY* NOTE SAYS HE{\textquoteright}LL SEND ME REPRINT WHEN THIS GETS DEVELOPED \& PUBLISHED IN FULL.},
	pages = {810a},
	keywords = {CONTRACTILE VESSEL},
	author = {Pilger, J. F. and Rice, M. E.}
}
